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2272 lines
1.3 MiB
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H04L" definition-exists="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION </text><reference><text>arrangements common to telegraphic and telephonic communication <class-ref scheme="cpc">H04M</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subclass <u>covers</u> transmission of signals having been supplied in digital form and includes data transmission, telegraphic communication, or methods or arrangements for monitoring.</note-paragraph><note-paragraph>In this subclass, it is desirable to add the indexing codes of group <class-ref scheme="cpc">H04L2101/00</class-ref>.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">H04L9/18</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L9/065</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L9/20</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L9/0656</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L9/22</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L9/0662</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L9/24</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L9/0662</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L9/26</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L9/0668</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L9/28</class-ref></entry><entry> covered by </entry><entry> <class-ref scheme="cpc">H04L9/002</class-ref>, <class-ref scheme="cpc">H04L9/008</class-ref>, <class-ref scheme="cpc">H04L9/06</class-ref>, <class-ref scheme="cpc">H04L9/08</class-ref>, <class-ref scheme="cpc">H04L9/30</class-ref>, <class-ref scheme="cpc">H04L9/32</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L12/20</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L69/00</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/04</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/03</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/17</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/02</class-ref> - <class-ref scheme="cpc">H04L25/0298</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/18</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/027</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/28</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/0268</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/30</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/061</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/32</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/49</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/34</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/4917</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/48</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/49</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/52</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/20</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/54</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/20</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/56</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/202</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/58</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/20</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/60</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/207</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/62</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/205</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/64</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/245</class-ref></entry></row><row><entry><class-ref scheme="ipc">H04L25/66</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H04L25/247</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H04L1/00" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L1/00" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L1/00</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Arrangements for detecting or preventing errors in the information received </text><CPC-specific-text><reference><text>correcting synchronisation <class-ref scheme="cpc">H04L7/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/0001" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems modifying transmission characteristics according to link quality, e.g. power backoff </text><reference><text>adaptive data allocation for multicarrier modulation <class-ref scheme="cpc">H04L5/0044</class-ref>; controlling transmission power for radio systems <class-ref scheme="cpc">H04W52/04</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0002" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adapting the transmission rate</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0003" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by switching between different modulation schemes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0004" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied to control information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0005" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied to payload information</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0006" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adapting the transmission format</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0007" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modifying the frame length</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0008" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by supplementing frame payload, e.g. with padding bits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0009" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adapting the channel coding </text><reference><text><class-ref scheme="cpc">H04L1/1812</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/001" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied to control information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0011" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied to payload information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0013" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rate matching, e.g. puncturing or repetition of code symbols</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0014" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adapting the source coding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0015" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the adaptation strategy</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0016" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving special memory structures, e.g. look-up tables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0017" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the mode-switching is based on Quality of Service requirement</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0018" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on latency requirement</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0019" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which mode-switching is based on a statistical approach</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/002" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Algorithms with memory of the previous states, e.g. Markovian models</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0021" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the algorithm uses adaptive thresholds</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0022" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which mode-switching is influenced by the user</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0023" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the signalling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0025" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of mode-switching indication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0026" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of channel quality indication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0027" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scheduling of signalling, e.g. occurrence thereof</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0028" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formatting</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0029" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling </text><reference><text>power control <class-ref scheme="cpc">H04W52/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/003" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0031" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple signaling transmission </text><reference><text><class-ref scheme="cpc">H04L1/1664</class-ref>, <class-ref scheme="cpc">F15</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0032" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Without explicit signalling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0033" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements specific to the transmitter</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0034" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the transmitter decides based on inferences, e.g. use of implicit signalling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0035" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>evaluation of received explicit signalling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0036" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements specific to the receiver</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0038" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blind format detection </text><reference><text>for detection of modulation format <class-ref scheme="cpc">H04L27/0012</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0039" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>other detection of signalling, e.g. detection of TFCI explicit signalling </text><reference><text><class-ref scheme="cpc">H04L1/0046</class-ref>, <class-ref scheme="cpc">H04L27/0012</class-ref> and <class-ref scheme="cpc">H04L25/0262</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/004" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using forward error control </text><reference><text><class-ref scheme="cpc">H04L1/0618</class-ref> takes precedence; coding, decoding or code conversion, for error detection or correction <class-ref scheme="cpc">H03M13/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0041" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements at the transmitter end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0042" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape </text><reference><text><class-ref scheme="cpc">H04L1/0067</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0043" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Realisations of complexity reduction techniques, e.g. use of look-up tables</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0044" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for power saving</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0045" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements at the receiver end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0046" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code rate detection or code type detection </text><reference><text><class-ref scheme="cpc">H04L1/0038</class-ref> takes precedence; detection of the data rate <class-ref scheme="cpc">H04L25/0262</class-ref>; for packet format <class-ref scheme="cpc">H04L1/0091</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0047" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Decoding adapted to other signal detection operation </text><reference><text>in conjunction with sequence estimation or equalization <class-ref scheme="cpc">H04L25/03286</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0048" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder </text><reference><text>for spatial equalizer <class-ref scheme="cpc">H04L25/03286</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/005" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Iterative decoding, including iteration between signal detection and decoding operation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0051" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stopping criteria</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0052" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0053" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for power saving</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0054" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0055" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>MAP-decoding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0056" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems characterized by the type of code used </text><reference><text><class-ref scheme="cpc">H04L1/08</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0057" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Block codes </text><reference><text><class-ref scheme="cpc">H04L1/0061</class-ref>, <class-ref scheme="cpc">H04L1/0064</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0058" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Block-coded modulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0059" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Convolutional codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/006" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Trellis-coded modulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0061" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error detection codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0063" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single parity check</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0064" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Concatenated codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0065" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Serial concatenated codes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0066" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel concatenated codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0067" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rate matching </text><reference><text><class-ref scheme="cpc">H04L1/0013</class-ref> and <class-ref scheme="cpc">H04L1/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0068" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by puncturing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0069" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Puncturing patterns</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/007" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unequal error protection </text><reference><text>for format <class-ref scheme="cpc">H04L1/0078</class-ref>; for codes <u>per se</u> <class-ref scheme="cpc">H03M13/35</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0071" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Use of interleaving </text><reference><text>interleaving <u>per se</u> <class-ref scheme="cpc">H03M13/27</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0072" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error control for data other than payload data, e.g. control data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0073" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special arrangements for feedback channel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0075" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of coding parameters to receiver </text><reference><text><class-ref scheme="cpc">H04L1/0023</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0076" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed coding, e.g. network coding, involving channel coding </text><reference><text>coding in both space and time <class-ref scheme="cpc">H04L1/0618</class-ref>; cooperative diversity <class-ref scheme="cpc">H04B7/022</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0077" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cooperative coding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/0078" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location </text><reference><text>forward error control, e.g. FEC, CRC <class-ref scheme="cpc">H04L1/004</class-ref>; adaptive formatting <class-ref scheme="cpc">H04L1/0006</class-ref>; mappings <class-ref scheme="cpc">H04L27/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0079" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formats for control data </text><reference><text><class-ref scheme="cpc">H04L1/16</class-ref> takes precedence; training sequences <class-ref scheme="cpc">H04L25/00</class-ref> and <class-ref scheme="cpc">H04L27/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/008" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the control data relates to payload of a different packet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0081" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formats specially adapted to avoid errors in the feedback channel </text><reference><text><class-ref scheme="cpc">H04L1/1607</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0082" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fields explicitly indicating existence of error in data being transmitted, e.g. so that downstream stations can avoid decoding erroneous packet; relays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0083" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formatting with frames or packets; Protocol or part of protocol for error control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0084" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formats for payload data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0085" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formatting with cells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0086" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unequal error protection </text><reference><text><class-ref scheme="cpc">H04L27/00</class-ref> and <class-ref scheme="cpc">H04L1/004</class-ref> take precedence for layer 1/2 aspects, e.g. bit loading</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0088" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in control part</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0089" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in payload</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/009" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements specific to transmitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/0091" definition-exists="true" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements specific to receivers, e.g. format detection </text><reference><text>detection of data rate <class-ref scheme="cpc">H04L25/0262</class-ref>; detection of coding rate <class-ref scheme="cpc">H04L1/0046</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L1/0092" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error control systems characterised by the topology of the transmission link</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/0093" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Point-to-multipoint</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/0094" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/0095" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/0096" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel splitting in point-to-point links</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/0097" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Relays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L1/0098" definition-exists="false" ipc-concordant="H04L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/0098</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unequal error protection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/02" definition-exists="true" ipc-concordant="H04L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L1/02</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>by diversity reception</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/04" definition-exists="true" ipc-concordant="H04L1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using frequency diversity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/06" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using space diversity</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0606" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Space-frequency coding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0612" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Space-time modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/0618" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Space-time coding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0625" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmitter arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0631" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receiver arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0637" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Properties of the code</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0643" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>block codes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/065" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of convolutional encoding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0656" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cyclotomic systems, e.g. Bell Labs Layered Space-Time [BLAST]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0662" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Limited orthogonality systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0668" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Orthogonal systems, e.g. using Alamouti codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/0675" definition-exists="true" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the signaling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0681" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapting space time parameters, i.e. modifying the space time matrix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0687" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Full feedback</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/0693" definition-exists="false" ipc-concordant="H04L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/0693</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Partial feedback, e.g. partial channel state information [CSI]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/08" definition-exists="true" ipc-concordant="H04L1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by repeating transmission, e.g. Verdan system </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H04L1/1858</class-ref> and <class-ref scheme="cpc">H04L1/189</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/12" definition-exists="true" ipc-concordant="H04L1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using return channel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L1/125" definition-exists="false" ipc-concordant="H04L1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2001/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for preventing errors in the return channel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/14" definition-exists="true" ipc-concordant="H04L1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L1/14</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>in which the signals are sent back to the transmitter to be checked </text><CPC-specific-text><text>; echo systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/16" definition-exists="true" ipc-concordant="H04L1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the return channel carries supervisory signals, e.g. repetition request signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/1607" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1607</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Details of the supervisory signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1614" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bitmaps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1621" definition-exists="true" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1628" definition-exists="true" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers </text><reference><text><class-ref scheme="cpc">H04L1/1614</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1635" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1642" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formats specially adapted for sequence numbers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/165" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable formats</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1657" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1664" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the supervisory signal being transmitted together with payload signals; piggybacking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1671" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the supervisory signal being transmitted together with control information</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1678" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the control information is for timing, e.g. time stamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1685" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1692" definition-exists="false" ipc-concordant="H04L1/1607" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/18" definition-exists="true" ipc-concordant="H04L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/18</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Automatic repetition systems, e.g. Van Duuren systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1803" definition-exists="false" ipc-concordant="H04L1/1803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1803</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Stop-and-wait protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1806" definition-exists="false" ipc-concordant="H04L1/1806" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1806</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Go-back-N protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1809" definition-exists="false" ipc-concordant="H04L1/1809" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1809</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Selective-repeat protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1812" definition-exists="false" ipc-concordant="H04L1/1812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1812</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Hybrid protocols</text></title-part><title-part><text>Hybrid automatic repeat request [HARQ]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1816" definition-exists="false" ipc-concordant="H04L1/1812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with retransmission of the same, encoded, message</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1819" definition-exists="false" ipc-concordant="H04L1/1812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1819</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with retransmission of additional or different redundancy</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1822" definition-exists="false" ipc-concordant="H04L1/1822" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1822</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>involving configuration of automatic repeat request [ARQ] with parallel processes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1825" definition-exists="false" ipc-concordant="H04L1/1825" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1825</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Adaptation of specific ARQ protocol parameters according to transmission conditions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1829" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1829</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements specially adapted for the receiver end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1832" definition-exists="true" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1832</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of sliding window management</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1835" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Buffer management</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1838" definition-exists="true" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for semi-reliable protocols, e.g. for less sensitive applications such as streaming video </text><reference><text>buffer level management for video bitstream receiver <class-ref scheme="cpc">H04N21/44004</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1841" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resequencing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1845" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combining techniques, e.g. code combining</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1848" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-out mechanisms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1851" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1851</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiple timers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1854" definition-exists="false" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scheduling and prioritising arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1858" definition-exists="true" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1858</classification-symbol><class-title date-revised="2021-08-01"><title-part><CPC-specific-text><text>Transmission or retransmission of more than one copy of acknowledgement message</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1861" definition-exists="true" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical mapping arrangements </text><reference><text>for ACK signaling <u>see</u> also <class-ref scheme="cpc">H04L5/0053</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1864" definition-exists="true" ipc-concordant="H04L1/1829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1864</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ARQ related signaling </text><reference><text><class-ref scheme="cpc">H04L1/1607</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L1/1867" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1867</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements specially adapted for the transmitter end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/187" definition-exists="true" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of sliding window management</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1874" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Buffer management</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1877" definition-exists="true" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for semi-reliable protocols, e.g. for less sensitive applications like streaming video </text><reference><text>buffer level management for video bitstream control arrangements <class-ref scheme="cpc">H04N21/44004</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/188" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-out mechanisms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L1/1883" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiple timers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1887" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1887</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scheduling and prioritising arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/189" definition-exists="true" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/189</classification-symbol><class-title date-revised="2021-08-01"><title-part><CPC-specific-text><text>Transmission or retransmission of more than one copy of a message</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1893" definition-exists="true" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1893</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical mapping arrangements </text><reference><text>physical resource mapping in general <class-ref scheme="cpc">H04L5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L1/1896" definition-exists="false" ipc-concordant="H04L1/1867" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L1/1896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ARQ related signaling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/20" definition-exists="true" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H04L1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using signal quality detector</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/201" definition-exists="true" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frame classification, e.g. bad, good or erased </text><reference><text>frame indication <u>per se</u> <class-ref scheme="cpc">H04L1/0082</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/203" definition-exists="false" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of error rate determination, e.g. BER, FER or WER</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/205" definition-exists="true" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>jitter monitoring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/206" definition-exists="false" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for modulated signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/208" definition-exists="false" ipc-concordant="H04L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving signal re-encoding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/22" definition-exists="true" ipc-concordant="H04L1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L1/22</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>using redundant apparatus to increase reliability</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L1/24" definition-exists="true" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Testing correct operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/241" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pseudo-errors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/242" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by comparing a transmitted test signal with a locally generated replica</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/243" definition-exists="true" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the transmitter, using a loop-back</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/244" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>test sequence generators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/245" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using the properties of transmission codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/246" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two-level transmission codes, e.g. binary</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L1/247" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>three-level transmission codes, e.g. ternary</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L1/248" definition-exists="false" ipc-concordant="H04L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L1/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distortion measuring systems </text><reference><text>measurement of non-linear distortion <class-ref scheme="cpc">G01R23/20</class-ref>; measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time, duration <class-ref scheme="cpc">G01R29/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L5/00" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L5/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Arrangements affording multiple use of the transmission path</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/0001" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for dividing the transmission path </text><reference><text>duplexing <class-ref scheme="cpc">H04L5/14</class-ref>; multiplexing of different sources on one path <class-ref scheme="cpc">H04J</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0003" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two-dimensional division </text><reference><text>time-code division <class-ref scheme="cpc">H04J11/00</class-ref>, <class-ref scheme="cpc">H04J13/00</class-ref>; for time-space division <class-ref scheme="cpc">H04B7/0413</class-ref>, <class-ref scheme="cpc">H04B7/0697</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0005" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-frequency</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0007" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H04L5/0007</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>the frequencies being orthogonal, e.g. OFDM(A), DMT</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L5/0008" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelet-division</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L5/001" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the frequencies being arranged in component carriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L5/0012" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hopping in multicarrier systems </text><reference><text>for frequency hopping in spread spectrum systems <class-ref scheme="cpc">H04B1/713</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0014" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three-dimensional division </text><reference><text>time-code-space division <class-ref scheme="cpc">H04B7/0413</class-ref>, <class-ref scheme="cpc">H04B7/0697</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0016" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-frequency-code</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0017" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which a distinct code is applied, as a temporal sequence, to each frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0019" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which one code is applied, as a temporal sequence, to all frequencies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0021" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0023" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-frequency-space</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0025" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spatial division following the spatial signature of the channel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0026" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Division using four or more dimensions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0028" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable division </text><reference><text>signaling therefor <class-ref scheme="cpc">H04L5/0092</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/003" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for allocating sub-channels of the transmission path</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0032" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0033" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>each allocating device acting autonomously, i.e. without negotiation with other allocating devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0035" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resource allocation in a cooperative multipoint environment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0037" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-user or inter-terminal allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0039" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0041" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency-non-contiguous</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0042" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intra-user or intra-terminal allocation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0044" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L5/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>allocation of payload</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L5/0044</class-ref> and <class-ref scheme="cpc">H04L5/0046</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2608</class-ref>.<br/>Group <class-ref scheme="cpc">H04L27/2608</class-ref>, <class-ref scheme="cpc">H04L5/0044</class-ref> and <class-ref scheme="cpc">H04L5/0046</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0046" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Determination of how many bits are transmitted on different sub-channels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0048" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L5/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of pilot signals, i.e. of signals known to the receiver</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L5/0048</class-ref> - <class-ref scheme="cpc">H04L5/0051</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2611</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/005" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of common pilots, i.e. pilots destined for multiple users or terminals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0051" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of dedicated pilots, i.e. pilots destined for a single user or terminal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0053" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of signaling, i.e. of overhead other than pilot signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0055" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical resource allocation for ACK/NACK </text><reference><text>for physical mapping arrangements in ARQ protocols <class-ref scheme="cpc">H04L1/1861</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0058" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation criteria</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/006" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quality of the received signal, e.g. BER, SNR, water filling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0062" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoidance of ingress interference, e.g. ham radio channels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0064" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rate requirement of the data, e.g. scalable bandwidth, data priority</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0066" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Requirements on out-of-channel emissions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0067" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation algorithms which involve graph matching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0069" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04L5/0069</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>Allocation based on distance or geographical location </text><reference><text>allocation based on terminal or device properties in general, <class-ref scheme="cpc">H04W72/51</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0071" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation based on fairness other than the proportional kind</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0073" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation arrangements that take into account other cell interferences </text><reference><text>for intercell interference mitigation or co-ordination in orthogonal multiplex systems <class-ref scheme="cpc">H04J11/005</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0075" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation using proportional fairness</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0076" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation utility-based</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0078" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing of allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/008" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>once only, on installation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0082" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at predetermined intervals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0083" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>symbol-by-symbol</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0085" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>when channel conditions change</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0087" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>when data requirements change</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/0089" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>due to addition or removal of users or terminals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/0091" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signaling for the administration of the divided path</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0092" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indication of how the channel is divided</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0094" definition-exists="true" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indication of how sub-channels of the path are allocated</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/0096" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indication of changes in allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/0098" definition-exists="false" ipc-concordant="H04L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/0098</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/02" definition-exists="false" ipc-concordant="H04L5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Channels characterised by the type of signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/023" definition-exists="false" ipc-concordant="H04L5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplexing of multicarrier modulation signals </text><reference><text>multicarrier modulation <class-ref scheme="cpc">H04L27/2601</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/026" definition-exists="false" ipc-concordant="H04L5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using code division</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/04" definition-exists="false" ipc-concordant="H04L5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L5/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>the signals being represented by different amplitudes or polarities, e.g. quadriplex</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/06" definition-exists="true" ipc-concordant="H04L5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the signals being represented by different frequencies </text><reference><text>combined with time-division multiplexing <class-ref scheme="cpc">H04L5/26</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/08" definition-exists="true" ipc-concordant="H04L5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L5/08</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>each combination of signals in different channels being represented by a fixed frequency</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/10" definition-exists="false" ipc-concordant="H04L5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with dynamo-electric generation of carriers</text></title-part><title-part><text>with mechanical filters or demodulators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/12" definition-exists="false" ipc-concordant="H04L5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the signals being represented by different phase modulations of a single carrier</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/14" definition-exists="true" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L5/14</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Two-way operation using the same type of signal, i.e. duplex</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1407" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Artificial lines or their setting </text><reference><text>for line transmission systems in general <class-ref scheme="cpc">H04B3/40</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1415" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using control lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1423" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for simultaneous baseband signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/143" definition-exists="true" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for modulated signals </text><reference><text><class-ref scheme="cpc">H04L5/1469</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1438" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Negotiation of transmission parameters prior to communication </text><reference><text>modified according to link quality <class-ref scheme="cpc">H04L1/0001</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/1446" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of transmission speed</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/1453" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of modulation type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1461" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Suppression of signals in the return path, i.e. bidirectional control circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/1469" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using time-sharing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/1476" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating bitwise</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/1484" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating bytewise</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L5/1492" definition-exists="false" ipc-concordant="H04L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/1492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with time compression, e.g. operating according to the ping-pong technique</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/16" definition-exists="false" ipc-concordant="H04L5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L5/16</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Half-duplex systems</text></title-part><title-part><text>Simplex/duplex switching</text></title-part><title-part><text>Transmission of break signals </text><CPC-specific-text><text>non-automatically inverting the direction of transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/18" definition-exists="false" ipc-concordant="H04L5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic changing of the traffic direction</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/20" definition-exists="true" ipc-concordant="H04L5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L5/20</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>using different combinations of lines, e.g. phantom working</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L5/22" definition-exists="false" ipc-concordant="H04L5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L5/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using time-division multiplexing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/225" definition-exists="false" ipc-concordant="H04L5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with the use of transition coding </text><reference><text>transition coding <class-ref scheme="cpc">H04L25/493</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/24" definition-exists="false" ipc-concordant="H04L5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with start-stop synchronous converters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L5/245" definition-exists="false" ipc-concordant="H04L5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04L5/245</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>with a number of discharge tubes or semiconductor elements which successively connect the different channels to the transmission channels </text><reference><text><u>see</u>: <class-ref scheme="cpc">H04L13/00</class-ref> - <class-ref scheme="cpc">H04L23/00</class-ref>, <class-ref scheme="cpc">H03K5/15</class-ref>, <class-ref scheme="cpc">H03K17/62</class-ref>, <class-ref scheme="cpc">H04J3/047</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L5/26" definition-exists="false" ipc-concordant="H04L5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with the use of different frequencies</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L7/00" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L7/00</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Arrangements for synchronising receiver with transmitter </text><CPC-specific-text><reference><text>synchronisation of generators of electric oscillations or pulses <class-ref scheme="cpc">H03L7/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0004" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Initialisation of the receiver </text><reference><text><class-ref scheme="cpc">H04L7/0075</class-ref> and <class-ref scheme="cpc">H04L7/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0008" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation information channels, e.g. clock distribution lines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0012" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by comparing receiver clock with transmitter clock</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0016" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>correction of synchronization errors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/002" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>correction by interpolation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0025" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interpolation of clock signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0029" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interpolation of received data signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0033" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correction by delay</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0037" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay of clock signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0041" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay of data signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0045" definition-exists="false" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correction by a latch cascade</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/005" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correction by an elastic buffer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0054" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection of the synchronisation error by features other than the received signal transition </text><reference><text>by means of signal transition <class-ref scheme="cpc">H04L7/033</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0058" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detection of error based on equalizer tap values</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0062" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detection of error based on data decision error, e.g. Mueller type detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0066" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detection of error based on transmission code rule</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/007" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detection of error based on maximum signal power, e.g. peak value, maximizing autocorrelation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0075" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with photonic or optical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0079" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receiver details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0083" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/0087" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preprocessing of received signal for synchronisation, e.g. by code conversion, pulse generation or edge detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0091" definition-exists="true" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmitter details</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/0095" definition-exists="false" ipc-concordant="H04L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/02" definition-exists="true" ipc-concordant="H04L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L7/02</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Speed or phase control by the received code signals, the signals containing no special synchronisation information </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H04L7/0075</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/027" definition-exists="true" ipc-concordant="H04L7/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0272" definition-exists="false" ipc-concordant="H04L7/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with squaring loop</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0274" definition-exists="false" ipc-concordant="H04L7/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with Costas loop</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0276" definition-exists="false" ipc-concordant="H04L7/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Self-sustaining, e.g. by tuned delay line and a feedback path to a logical gate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0278" definition-exists="false" ipc-concordant="H04L7/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Band edge detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/033" definition-exists="true" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0331" definition-exists="true" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L7/0331</classification-symbol><class-title date-revised="2022-02-01"><title-part><CPC-specific-text><text>with a digital phase-locked loop [PLL] processing binary samples, e.g. add/subtract logic for correction of receiver clock </text><reference><text><class-ref scheme="cpc">H04L7/0337</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0332" definition-exists="true" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an integrator-detector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0334" definition-exists="true" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0334</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Processing of samples having at least three levels, e.g. soft decisions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L7/0335" definition-exists="false" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gardner detector</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/0337" definition-exists="true" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L7/0338" definition-exists="false" ipc-concordant="H04L7/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/0338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the correction of the phase error being performed by a feed forward loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L7/04" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Speed or phase control by synchronisation signals </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H04L7/0075</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/041" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using special codes as synchronising signal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/042" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detectors therefor, e.g. correlators, state machines </text><reference><text>digital correlators in general <class-ref scheme="cpc">G06F17/15</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/043" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pseudo-noise [PN] codes variable during transmission </text><reference><text>synchronisation of spread spectrum receivers <class-ref scheme="cpc">H04B1/69</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/044" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single bit, e.g. start stop bit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L7/045" definition-exists="false" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2007/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fill bit or bits, idle words</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/046" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a dotting sequence</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L7/047" definition-exists="false" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2007/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a sine signal or unmodulated carrier</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/048" definition-exists="true" ipc-concordant="H04L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the properties of error detecting or error correcting codes, e.g. parity as synchronisation signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/06" definition-exists="true" ipc-concordant="H04L7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L7/06</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>the synchronisation signals differing from the information signals in amplitude, polarity or frequency </text><CPC-specific-text><text>or length</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L7/065" definition-exists="true" ipc-concordant="H04L7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and superimposed by modulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/08" definition-exists="true" ipc-concordant="H04L7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the synchronisation signals recurring cyclically</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L7/10" definition-exists="true" ipc-concordant="H04L7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>H04L7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for initial synchronisation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L9/00" definition-exists="true" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L9/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Cryptographic mechanisms or cryptographic</text></CPC-specific-text><text> arrangements for secret or secure communications</text></title-part><title-part><text>Network security protocols</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>covers</u>: <subnote><note-paragraph>1.1 Cryptographic mechanisms including cryptographic protocols and cryptographic algorithms, whereby a cryptographic protocol is a distributed cryptographic algorithm defined by a sequence of steps precisely specifying the actions required of two or more entities to achieve specific security objectives (e.g. cryptographic protocol for key agreement), and whereby a cryptographic algorithm is specifying the steps followed by a single entity to achieve specific security objectives (e.g. cryptographic algorithm for symmetric key encryption). </note-paragraph><note-paragraph>1.2 <class-ref scheme="cpc">H04L9/00</class-ref> focuses on cryptographic mechanisms such as encryption schemes, digital signatures, hash functions, random number generation, key management, said cryptographic mechanisms providing information security such as privacy or confidentiality, data integrity, message authentication, entity authentication, authorization, validation, certification, time-stamping, anonymity, revocation, non-repudiation. </note-paragraph><note-paragraph>1.3 <class-ref scheme="cpc">H04L9/00</class-ref> covers also countermeasures against attacks on cryptographic mechanisms. </note-paragraph></subnote></note-paragraph><note-paragraph>This group <u>does not cover</u>: <subnote><note-paragraph>2.1 Networking architectures or network communication protocols for securing the traffic flowing through data packet networks and providing secure exchanges among applications communicating through data packet networks, which are covered by <class-ref scheme="cpc">H04L63/00</class-ref>. Attention is drawn to the Note 1. after group <class-ref scheme="cpc">H04L63/00</class-ref></note-paragraph><note-paragraph>2.2 Security arrangements for protecting computers or computer systems against unauthorised activity, which are covered by <class-ref scheme="cpc">G06F21/00</class-ref></note-paragraph></subnote></note-paragraph><note-paragraph> In subgroups <class-ref scheme="cpc">H04L9/001</class-ref> - <class-ref scheme="cpc">H04L9/38</class-ref>, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, classification is made in the last appropriate place. </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/001" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using chaotic signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/002" definition-exists="true" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Countermeasures against attacks on cryptographic mechanisms </text><reference><text>network architectures or network communication protocols for protection against malicious traffic <class-ref scheme="cpc">H04L63/1441</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/003" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for power analysis, e.g. differential power analysis [DPA] or simple power analysis [SPA]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/004" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for fault attacks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/005" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for timing attacks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/006" definition-exists="true" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving public key infrastructure [PKI] trust models </text><reference><text>network architecture or network communication protocol for supporting authentication of entities using certificates in a packet data network <class-ref scheme="cpc">H04L63/0823</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/007" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving hierarchical structures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/008" definition-exists="true" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving homomorphic encryption</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/06" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the encryption apparatus using shift registers or memories for block-wise </text><CPC-specific-text><text>or stream</text></CPC-specific-text><text> coding, e.g. DES systems </text><CPC-specific-text><text>or RC4; Hash functions; Pseudorandom sequence generators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0618" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0625" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0631" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0637" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0643" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hash functions, e.g. MD5, SHA, HMAC or f9 MAC</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/065" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0656" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0662" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with particular pseudorandom sequence generator</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L9/0668" definition-exists="true" ipc-concordant="H04L9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>producing a non-linear pseudorandom sequence</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/08" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Key distribution </text><CPC-specific-text><text>or management, e.g. generation, sharing or updating, of cryptographic keys or passwords </text><reference><text>network architectures or network communication protocols for supporting key management in a packet data network <class-ref scheme="cpc">H04L63/06</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0816" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0819" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0819</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) </text><reference><text>network architectures or network communication protocols for key distribution in a packet data network <class-ref scheme="cpc">H04L63/062</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0822" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using key encryption key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0825" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0827" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving distinctive intermediate devices or communication paths </text><reference><text>network architectures or network communication protocols using different networks <class-ref scheme="cpc">H04L63/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/083" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L9/0833" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving conference or group key </text><reference><text>network architectures or network communication protocols for key management in group communication in a packet data network <class-ref scheme="cpc">H04L63/065</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L9/0836" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tree structure or hierarchical structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0838" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these </text><reference><text>network architectures or network communication protocols for key exchange in a packet data network <class-ref scheme="cpc">H04L63/061</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0841" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving Diffie-Hellman or related key agreement protocols</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L9/0844" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0844</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with user authentication or key authentication, e.g. ElGamal, MTI, MQV-Menezes-Qu-Vanstone protocol or Diffie-Hellman protocols using implicitly-certified keys</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0847" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving identity based encryption [IBE] schemes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/085" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Secret sharing or secret splitting, e.g. threshold schemes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0852" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H04L9/0852</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Quantum cryptography </text><reference><text>transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red <class-ref scheme="cpc">H04B10/00</class-ref>; wavelength-division multiplex systems <class-ref scheme="cpc">H04J14/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0855" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L9/0858" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0861" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generation of secret information including derivation or calculation of cryptographic keys or passwords</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0863" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving passwords or one-time passwords </text><reference><text>network architectures or network communication protocols for using one-time keys in a packet data network <class-ref scheme="cpc">H04L63/067</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0866" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0869" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving random numbers or seeds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0872" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using geo-location information, e.g. location data, time, relative position or proximity to other entities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0875" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on channel impulse response [CIR]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0877" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using additional device, e.g. trusted platform module [TPM], smartcard, USB or hardware security module [HSM]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/088" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms </text><reference><text>network architectures or network communication protocols for using time-dependent keys in a packet data network <class-ref scheme="cpc">H04L63/068</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0891" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Revocation or update of secret information, e.g. encryption key update or rekeying</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/0894" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0894</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/0897" definition-exists="true" ipc-concordant="H04L9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/0897</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving additional devices, e.g. trusted platform module [TPM], smartcard or USB</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/10" definition-exists="false" ipc-concordant="H04L9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H04L9/10</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>with particular housing, physical features or manual controls</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/12" definition-exists="false" ipc-concordant="H04L9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitting and receiving encryption devices synchronised or initially set up in a particular manner</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/14" definition-exists="true" ipc-concordant="H04L9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H04L9/14</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>using a plurality of keys or algorithms</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/16" definition-exists="true" ipc-concordant="H04L9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the keys or algorithms being changed during operation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/30" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3006" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>underlying computational problems or public-key parameters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3013" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the discrete logarithm problem, e.g. ElGamal or Diffie-Hellman systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/302" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the integer factorization problem, e.g. RSA or quadratic sieve [QS] schemes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3026" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details relating to polynomials generation, e.g. generation of irreducible polynomials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3033" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details relating to pseudo-prime or prime number generation, e.g. primality test</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/304" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on error correction codes, e.g. McEliece</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3066" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving algebraic varieties, e.g. elliptic or hyper-elliptic curves</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3073" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3093" definition-exists="true" ipc-concordant="H04L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving Lattices or polynomial equations, e.g. NTRU scheme</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/32" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H04L9/32</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>including means for verifying the identity or authority of a user of the system </text><CPC-specific-text><text>or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/321" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a third party or a trusted authority</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3213" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tickets or tokens, e.g. Kerberos </text><reference><text>network architectures or network communication protocols for entities authentication using tickets in a packet data network <class-ref scheme="cpc">H04L63/0807</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3215" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of channels </text><reference><text>network architectures or network communication protocols using different networks <class-ref scheme="cpc">H04L63/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3218" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using proof of knowledge, e.g. Fiat-Shamir, GQ, Schnorr, ornon-interactive zero-knowledge proofs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3221" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interactive zero-knowledge proofs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3226" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a predetermined code, e.g. password, passphrase or PIN </text><reference><text>network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network <class-ref scheme="cpc">H04L63/083</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3228" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>One-time or temporary data, i.e. information which is sent for every authentication or authorization, e.g. one-time-password, one-time-token or one-time-key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3231" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Biological data, e.g. fingerprint, voice or retina </text><reference><text>network architectures or network communication protocols for supporting authentication of entities using biometrical features in a packet data network <class-ref scheme="cpc">H04L63/0861</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3234" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving additional secure or trusted devices, e.g. TPM, smartcard, USB or software token </text><reference><text>network architectures or network communication protocols for supporting authentication of entities using an additional device in a packet data network <class-ref scheme="cpc">H04L63/0853</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3236" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using cryptographic hash functions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3239" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3242" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3247" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving digital signatures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3249" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using RSA or related signature schemes, e.g. Rabin scheme</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3252" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using DSA or related signature schemes, e.g. elliptic based signatures, ElGamal or Schnorr schemes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3255" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using group based signatures, e.g. ring or threshold signatures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3257" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using blind signatures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3263" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements </text><reference><text>network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network <class-ref scheme="cpc">H04L63/0823</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3265" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using certificate chains, trees or paths; Hierarchical trust model</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3268" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3271" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using challenge-response</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3273" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for mutual authentication </text><reference><text>network architectures or network communication protocols for achieving mutual authentication in a packet data network <class-ref scheme="cpc">H04L63/0869</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L9/3278" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using physically unclonable functions [PUF]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L9/3297" definition-exists="true" ipc-concordant="H04L9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/3297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving time stamps, e.g. generation of time stamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/34" definition-exists="true" ipc-concordant="H04L9/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bits, or blocks of bits, of the telegraphic message being interchanged in time </text><CPC-specific-text><reference><text>for speech signals <class-ref scheme="cpc">H04K1/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/36" definition-exists="true" ipc-concordant="H04L9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for detecting characters not meant for transmission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/38" definition-exists="true" ipc-concordant="H04L9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Encryption being effected by mechanical apparatus, e.g. rotating cams, switches, keytape punchers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/40" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L9/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network security protocols</text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph><CPC-specific-note>When allocating <class-ref scheme="cpc">H04L9/40</class-ref> to patent documents, attention should be made to check whether other subgroups from <class-ref scheme="cpc">H04L63/00</class-ref> need to be allocated also for a complete classification.</CPC-specific-note></note-paragraph></note><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L9/40</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L61/09</class-ref>, <class-ref scheme="cpc">H04L63/00</class-ref>, <class-ref scheme="cpc">H04L65/60</class-ref>, <class-ref scheme="cpc">H04L65/61</class-ref>, <class-ref scheme="cpc">H04L65/611</class-ref>, <class-ref scheme="cpc">H04L65/612</class-ref>, <class-ref scheme="cpc">H04L65/613</class-ref>, <class-ref scheme="cpc">H04L65/65</class-ref>, <class-ref scheme="cpc">H04L65/70</class-ref>, <class-ref scheme="cpc">H04L65/75</class-ref>, <class-ref scheme="cpc">H04L65/752</class-ref>, <class-ref scheme="cpc">H04L65/756</class-ref>, <class-ref scheme="cpc">H04L67/01</class-ref>, <class-ref scheme="cpc">H04L67/1001</class-ref>, <class-ref scheme="cpc">H04L67/10015</class-ref>, <class-ref scheme="cpc">H04L67/131</class-ref>, <class-ref scheme="cpc">H04L67/133</class-ref>, <class-ref scheme="cpc">H04L67/1396</class-ref> and <class-ref scheme="cpc">H04L67/50</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L9/50" definition-exists="false" ipc-concordant="H04L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L9/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>using hash chains, e.g. blockchains or hash trees</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L12/00" definition-exists="true" ipc-concordant="H04L12/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data switching networks </text><reference><text>interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units <class-ref scheme="cpc">G06F13/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/02" definition-exists="false" ipc-concordant="H04L12/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/04" definition-exists="true" ipc-concordant="H04L12/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switchboards</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/06" definition-exists="false" ipc-concordant="H04L12/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Answer-back mechanisms or circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/08" definition-exists="false" ipc-concordant="H04L12/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L12/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Allotting numbers to messages</text></title-part><title-part><text>Counting characters, words or messages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/10" definition-exists="true" ipc-concordant="H04L12/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Current supply arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/12" definition-exists="true" ipc-concordant="H04L12/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for remote connection or disconnection of substations or of equipment thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/14" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L12/14</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Charging </text><CPC-specific-text><text>, metering or billing</text></CPC-specific-text><text> arrangements </text><CPC-specific-text><text>for data wireline or wireless communications</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1403" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Architecture for metering, charging or billing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1407" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Policy-and-charging control [PCC] architecture</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/141" definition-exists="false" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indication of costs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1414" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in real-time</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1417" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1417</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Advice of charge with threshold, e.g. user indicating maximum cost</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1421" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indication of expected costs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1425" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving dedicated fields in the data packet for billing purposes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1428" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Invoice generation, e.g. customization, lay-out, database processing, algorithms for calculating the bill or formatting invoices as WWW pages </text><reference><text>invoicing in general <class-ref scheme="cpc">G06Q30/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1432" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Metric aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1435" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>volume-based</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1439" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1439</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>time-based</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1442" definition-exists="false" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at network operator level</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1446" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inter-operator billing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/145" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>trading network capacity or selecting route based on tariff</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1453" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods or systems for payment or settlement of the charges for data transmission involving significant interaction with the data transmission network</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1457" definition-exists="false" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an account</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/146" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital cash</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1464" definition-exists="false" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a card, such as credit card, prepay card or SIM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1467" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving prepayment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1471" definition-exists="false" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>splitting of costs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1475" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the splitting involving a third party</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1478" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the splitting involving only the communication parties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1482" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving use of telephony infrastructure for billing for the transport of data, e.g. call detail record [CDR] or intelligent network infrastructure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/1485" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tariff-related aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1489" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>dependent on congestion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1492" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>negotiation of tariff</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1496" definition-exists="true" ipc-concordant="H04L12/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving discounts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/16" definition-exists="false" ipc-concordant="H04L12/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H04L12/16</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Arrangements for providing special services to substations</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/18" definition-exists="true" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L12/18</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>for broadcast or conference </text><CPC-specific-text><text>, e.g. multicast</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1804" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for stock exchange and similar applications</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1809" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for auctioneering devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1813" definition-exists="true" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/1813</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for computer conferences, e.g. chat rooms </text><reference><text>instant messaging <class-ref scheme="cpc">H04L51/04</class-ref>; protocols for multimedia communication <class-ref scheme="cpc">H04L65/1101</class-ref>; arrangements for multi-party communication <class-ref scheme="cpc">H04L65/403</class-ref>; telephonic conference arrangements <class-ref scheme="cpc">H04M3/56</class-ref>; television conference systems <class-ref scheme="cpc">H04N7/15</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1818" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Conference organisation arrangements, e.g. handling schedules, setting up parameters needed by nodes to attend a conference, booking network resources, notifying involved parties</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1822" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1827" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network arrangements for conference optimisation or adaptation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1831" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1831</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tracking arrangements for later retrieval, e.g. recording contents, participants activities or behavior, network status</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1836" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heterogeneous network architecture</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/184" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heterogeneous receivers, e.g. layered multicast</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1845" definition-exists="true" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/1845</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>broadcast or multicast in a specific location, e.g. geocast </text><reference><text>protocols for adapting network applications to user terminal location <class-ref scheme="cpc">H04L67/52</class-ref>; services specially adapted for wireless communication networks making use of the location of users or terminals <class-ref scheme="cpc">H04W4/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/185" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with management of multicast group membership</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1854" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with non-centralised forwarding system, e.g. chaincast</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1859" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted to provide push services, e.g. data channels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1863" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising mechanisms for improved reliability, e.g. status reports </text><reference><text>arrangements for detecting or preventing errors by carrying supervisory signal the return channel <class-ref scheme="cpc">H04L1/16</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1868" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures taken after transmission, e.g. acknowledgments</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/1872" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding ACK or NACK implosion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/1877" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures taken prior to transmission</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1881" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with schedule organisation, e.g. priority, sequence management</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1886" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/189" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with wireless systems </text><reference><text>selective distribution or broadcast in wireless communication networks <class-ref scheme="cpc">H04W4/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/1895" definition-exists="false" ipc-concordant="H04L12/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/1895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for short real-time information, e.g. alarms, notifications, alerts, updates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/22" definition-exists="true" ipc-concordant="H04L12/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing the taking of data from a data transmission channel without authorisation </text><reference><text>means for verifying the identity or the authority of a user of a secure or secret communication system <class-ref scheme="cpc">H04L9/32</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/28" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L12/28</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] </text><reference><text>wireless communication networks <class-ref scheme="cpc">H04W</class-ref> </text><CPC-specific-text><text>; arrangements for dividing the transmission path <class-ref scheme="cpc">H04W40/00</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/2801" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2801</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Broadband local area networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/2803" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Home automation networks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2805" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Home Audio Video Interoperability [HAVI] networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2807" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2807</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Exchanging configuration information on appliance services in a home automation network </text><reference><text>arrangements for maintenance or administration involving network analysis for automatically determining the actual topology of a network <class-ref scheme="cpc">H04L41/12</class-ref>; hardware or software tools for network management using graphical user interfaces <class-ref scheme="cpc">H04L41/22</class-ref>; address allocation <class-ref scheme="cpc">H04L61/50</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2809" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2809</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>indicating that an appliance service is present in a home automation network </text><reference><text>monitoring functionality <class-ref scheme="cpc">H04L43/0817</class-ref>; discovery or management thereof, e.g. service location protocol [SLP] or web services, <class-ref scheme="cpc">H04L67/51</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/281" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/281</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>indicating a format for calling an appliance service function in a home automation network </text><reference><text>for remote control or remote monitoring of applications <class-ref scheme="cpc">H04L67/025</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2812" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H04L12/2812</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>describing content present in a home automation network, e.g. audio video content </text><reference><text>retrieval from the Internet <class-ref scheme="cpc">G06F16/95</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2814" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/2814</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Exchanging control software or macros for controlling appliance services in a home automation network </text><reference><text>arrangements for maintenance or administration involving configuration of the network and network elements <class-ref scheme="cpc">H04L41/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2816" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling appliance services of a home automation network by calling their functionalities </text><reference><text>arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station; in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom <class-ref scheme="cpc">H04Q9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2818" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2818</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>from a device located outside both the home and the home network </text><reference><text>access arrangements <class-ref scheme="cpc">H04L12/2856</class-ref>; for remote control or remote monitoring of applications <class-ref scheme="cpc">H04L67/025</class-ref>; arrangements for transmitting signals characterised by the use of a wireless eletrical link <class-ref scheme="cpc">G08C17/00</class-ref>; telephonic communication systems adapted for combination with remote control systems <class-ref scheme="cpc">H04M11/007</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/282" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>H04L12/282</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>based on user interaction within the home </text><reference><text>receiver circuitry for displaying additional information being controlled by a remote control apparatus <class-ref scheme="cpc">H04N21/42204</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2821" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2821</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Avoiding conflicts related to the use of home appliances </text><reference><text>cryptographic protocols <class-ref scheme="cpc">H04L9/00</class-ref>; protocols for network security <class-ref scheme="cpc">H04L63/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2823" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reporting information sensed by appliance or service execution status of appliance services in a home automation network </text><reference><text>device-related reporting <class-ref scheme="cpc">H04L43/065</class-ref>; arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom <class-ref scheme="cpc">H04Q9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2825" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2825</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Reporting to a device located outside the home and the home network </text><reference><text>access arrangements <class-ref scheme="cpc">H04L12/2856</class-ref>; for remote control or remote monitoring of applications <class-ref scheme="cpc">H04L67/025</class-ref>; telephonic communication systems adapted for combination with telemetering systems <class-ref scheme="cpc">H04M11/002</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2827" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reporting to a device within the home network; wherein the reception of the information reported automatically triggers the execution of a home appliance functionality</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2829" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2829</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving user profiles according to which the execution of a home appliance functionality is automatically triggered</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/283" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Processing of data at an internetworking point of a home automation network</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2832" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2832</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection of the control functionalities between home networks </text><reference><text>single bridge functionality <class-ref scheme="cpc">H04L12/4625</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2834" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2834</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching of information between an external network and a home network </text><reference><text>access arrangements <class-ref scheme="cpc">H04L12/2856</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2836" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2836</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Protocol conversion between an external network and a home network </text><reference><text>controlling appliance services of a home automation network from a device located outside the home and the home network <class-ref scheme="cpc">H04L12/2818</class-ref>; protocol conversion <class-ref scheme="cpc">H04L69/08</class-ref>; adaptation of digital video signals for transport over a specific home network <class-ref scheme="cpc">H04N7/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2838" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L12/2838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths </text><reference><text>adaptations of television systems for transmission by electric cable for domestic distribution <class-ref scheme="cpc">H04N7/106</class-ref>; hybrid transport <class-ref scheme="cpc">H04L12/6418</class-ref>; home network arrangements specially adapted for distribution of digital video signals <class-ref scheme="cpc">H04N7/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/284" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the type of medium used</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/2841" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/2841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wireless</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/2843" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/2843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mains power line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/2845" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/2845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Telephone line</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/2847" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/2847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the type of home appliance used</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/2849" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/2849</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Audio/video appliances</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/285" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generic home appliances, e.g. refrigerators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/2852" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Metropolitan area networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/2854" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wide area networks, e.g. public data networks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/2856" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H04L12/2856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access arrangements, e.g. Internet access </text><reference><text>asynchronous transfer mode networks <class-ref scheme="cpc">H04L12/5601</class-ref>; broadband local area networks <class-ref scheme="cpc">H04L12/2801</class-ref>; optical access or distribution networks <class-ref scheme="cpc">H04Q11/0067</class-ref>; access to open networks <class-ref scheme="cpc">H04L12/5691</class-ref>; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network <class-ref scheme="cpc">H04M11/00</class-ref>; home network gateways <class-ref scheme="cpc">H04L12/2834</class-ref>; wireless access networks <class-ref scheme="cpc">H04W</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>covers</u>: <subnote type="bullet"><note-paragraph>access to a public data network, such as an IP network, for subscribers, i.e. customers of a network service provider, over a wired network. </note-paragraph><note-paragraph>communication of generic types of data between end-user equipments, located typically at the subscriber premises, and an access server, which acts as interface between the access network and the public data network. </note-paragraph></subnote></note-paragraph><note-paragraph>This group <u>does not cover</u>: <subnote type="bullet"><note-paragraph>wireless access networks, which are covered by <class-ref scheme="cpc">H04W</class-ref></note-paragraph><note-paragraph>optical distribution networks, which are covered by <class-ref scheme="cpc">H04Q11/0067</class-ref></note-paragraph><note-paragraph>bit-level, or PHY layer, processing of data between digital subscriber line equipments, which is covered by <class-ref scheme="cpc">H04M11/06</class-ref></note-paragraph><note-paragraph>design of DSL, digital subscriber line, modems, which is covered by <class-ref scheme="cpc">H04M11/06</class-ref></note-paragraph><note-paragraph>exchange of data related to functionalities of home network appliances between a home network and an external network, which is covered by <class-ref scheme="cpc">H04L12/2803</class-ref></note-paragraph><note-paragraph>management of WDM parameters in optical multiplex systems, which is covered by <class-ref scheme="cpc">H04J14/02</class-ref></note-paragraph><note-paragraph>circuit-switched access networks, which are covered by <class-ref scheme="cpc">H04M7/1205</class-ref></note-paragraph><note-paragraph>access arrangements for providing telephone service in networks other than PSTN/ISDN, which are covered by <class-ref scheme="cpc">H04M7/0066</class-ref></note-paragraph></subnote></note-paragraph><note-paragraph>In this group the following terms or expressions are used with the meaning indicated: <subnote type="bullet"><note-paragraph>ATM means Asynchronous Transfer Mode </note-paragraph><note-paragraph>LAN means Local Area Network </note-paragraph><note-paragraph>BRAS means Broadband Remote Access Server </note-paragraph><note-paragraph>DSLAM means Digital Subscriber Line Access Multiplexer </note-paragraph><note-paragraph>MSAN means MultiService Access Node </note-paragraph><note-paragraph>DSL means Digital Subscriber Line </note-paragraph><note-paragraph>IP means Internet Protocol </note-paragraph><note-paragraph>WDM means Wavelength Division Multiplexing </note-paragraph><note-paragraph>SDH means Synchronous Digital Hierarchy </note-paragraph><note-paragraph>OTN means Optical Transport Network </note-paragraph><note-paragraph>PSTN means Public Switched Telephone Network </note-paragraph><note-paragraph>ISDN means Integrated Services Digital Network </note-paragraph><note-paragraph>TDM means Time-Division Multiplexing </note-paragraph><note-paragraph>TDMA means Time Division Multiple Access </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2858" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access network architectures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2859" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/2859</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Point-to-point connection between the data network and the subscribers </text><reference><text>encapsulation <class-ref scheme="cpc">H04L12/4633</class-ref>; virtual LANs <class-ref scheme="cpc">H04L12/4641</class-ref>; routing of packets <class-ref scheme="cpc">H04L45/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2861" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Point-to-multipoint connection from the data network to the subscribers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2863" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/2863</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Arrangements for combining access network resources elements, e.g. channel bonding </text><reference><text>modem pooling <class-ref scheme="cpc">H04L25/14</class-ref>; routing of packets <class-ref scheme="cpc">H04L45/00</class-ref>; multichannel or multilink protocols <class-ref scheme="cpc">H04L69/14</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2865" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Logical combinations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2867" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2867</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical combinations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/2869" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operational details of access network equipments </text><reference><text>admission control or resource allocation in access networks <class-ref scheme="cpc">H04L12/5692</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/287" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Remote access server, e.g. BRAS</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2872" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Termination of subscriber connections</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2874" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Processing of data for distribution to the subscribers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2876" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/2876</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Handling of subscriber policies </text><reference><text>group policies management <class-ref scheme="cpc">H04L41/0893</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2878" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access multiplexer, e.g. DSLAM </text><reference><text>generic distributed time multiplexers, e.g. TDM/TDMA <class-ref scheme="cpc">H04J3/1694</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2879" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2879</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the network type on the uplink side, i.e. towards the service provider network</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2881" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>IP/Ethernet DSLAM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2883" definition-exists="false" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM DSLAM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2885" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements interfacing with optical systems </text><reference><text>optical network equipment <class-ref scheme="cpc">H04B10/00</class-ref>; optical multiplexers <class-ref scheme="cpc">H04J14/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2887" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2887</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the offered subscriber services</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2889" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2889</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiservice, e.g. MSAN</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/289" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single service</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/2892" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the access multiplexer architecture</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2894" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2894</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Centralized processing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L12/2896" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed processing, e.g. on line cards</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/2898" definition-exists="true" ipc-concordant="H04L12/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/2898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subscriber equipments </text><reference><text>DSL modems <class-ref scheme="cpc">H04M11/062</class-ref>; cable modems <class-ref scheme="cpc">H04L12/2801</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/40" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bus networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/40006" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40006</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Architecture of a communication node </text><reference><text>current supply arrangements <class-ref scheme="cpc">H04L12/10</class-ref>; intermediate storage or scheduling <class-ref scheme="cpc">H04L49/90</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In this group the following terms or expressions are used with the meaning indicated: <subnote type="bullet"><note-paragraph>a bus controller is a microprocessor dedicated to input and output of data by a node on a bus; </note-paragraph><note-paragraph>a bus master is a device controlling which node accesses the bus at a particular time; </note-paragraph><note-paragraph>a bus guardian is a device monitoring the timing of node accesses on the bus; </note-paragraph><note-paragraph>a bus interface enhancer is a hardware or software arrangement managing the bus controller or the bus interface to modify its behaviour or providing a transparent interface to the bus controller </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40013" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding a bus controller</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40019" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding a bus master</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40026" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding a bus guardian</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40032" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding a bus interface enhancer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40039" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding the setting of the power status of a node according to activity on the bus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40045" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details regarding the feeding of energy to the node from the bus</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/40052" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High-speed IEEE 1394 serial bus </text><reference><text>bus transfer protocol on a daisy chain bus using an embedded synchronisation <class-ref scheme="cpc">G06F13/426</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40058" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Isochronous transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40065" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40065</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Bandwidth and channel allocation </text><reference><text>home automation networks <class-ref scheme="cpc">H04L12/2803</class-ref>; flow control <class-ref scheme="cpc">H04L47/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40071" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40071</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Packet processing; Packet format </text><reference><text>adaptation of digital video signals for transport over a specific network <class-ref scheme="cpc">H04N21/2381</class-ref>, <class-ref scheme="cpc">H04N21/4363</class-ref>, <class-ref scheme="cpc">H04N21/4381</class-ref>; packet switches <class-ref scheme="cpc">H04L49/00</class-ref>; intermediate storage or scheduling <class-ref scheme="cpc">H04L49/90</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40078" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40078</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Bus configuration </text><reference><text>home automation networks <class-ref scheme="cpc">H04L12/2803</class-ref>; arrangements for maintenance or administration <class-ref scheme="cpc">H04L41/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40084" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus arbitration</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40091" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus bridging </text><reference><text>LAN interconnection over a bridge based backbone <class-ref scheme="cpc">H04L12/462</class-ref>; single bridge functionality <class-ref scheme="cpc">H04L12/462</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40097" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection with other networks </text><reference><text>LAN interconnection over a bridge based backbone <class-ref scheme="cpc">H04L12/462</class-ref>; single bridge functionality <class-ref scheme="cpc">H04L12/462</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40104" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/40104</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Security; Encryption; Content protection </text><reference><text>cryptographic protocols <class-ref scheme="cpc">H04L9/00</class-ref>; protocols for network security <class-ref scheme="cpc">H04L63/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40117" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L12/40117</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection of audio or video/imaging devices </text><reference><text>home automation networks <class-ref scheme="cpc">H04L12/2803</class-ref>; bitstream network arrangements specially adapted for distribution of digital video signals <class-ref scheme="cpc">H04N7/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40123" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection of computers and peripherals </text><reference><text>printer information exchange with computer <class-ref scheme="cpc">G06F3/1293</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/4013" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L12/4013</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Management of data rate on the bus </text><reference><text>systems modifying transmission characteristics according to link quality <class-ref scheme="cpc">H04L1/0001</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40136" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Nodes adapting their rate to the physical link properties </text><reference><text>LAN switches <class-ref scheme="cpc">H04L49/351</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/40143" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40143</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>involving priority mechanisms </text><reference><text>hybrid switching fabrics <class-ref scheme="cpc">H04L12/6402</class-ref>; intermediate storage or scheduling <class-ref scheme="cpc">H04L49/90</class-ref>; time-division multiplex systems <class-ref scheme="cpc">H04J3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4015" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by scheduling the transmission of messages at the communication node</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40156" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40156</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using dedicated slots associated with a priority level</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40163" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by assigning priority to messages according to a message field</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/40169" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/40169</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Flexible bus arrangements </text><reference><text>arrangements for maintenance or administration involving management of faults; events, alarms <class-ref scheme="cpc">H04L41/06</class-ref>; automatic restoration of network faults <class-ref scheme="cpc">H04L41/0654</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/40176" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving redundancy </text><reference><text>error detection or correction of the data by redundancy in hardware using active fault-masking in interconnections <class-ref scheme="cpc">G06F11/2002</class-ref>; error detection or correction of the data by redundancy in hardware using active fault-masking in storage systems using spares or by reconfiguring <class-ref scheme="cpc">G06F11/2053</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/40182" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a plurality of communication lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/40189" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a plurality of bus systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/40195" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a plurality of nodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/40202" definition-exists="true" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/40202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a plurality of master stations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/40208" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the use of a particular bus standard</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this group the following terms or expressions are used with the meaning indicated: <subnote type="bullet"><note-paragraph>Controller-area network (CAN or CAN-bus) designates a computer network protocol and bus standard developed in 1983 by Intel Corporation and Robert Bosch GmbH to allow microcontrollers and devices to communicate with each other without a host computer; </note-paragraph><note-paragraph>PROFIBUS (Process Field Bus) designatesa standard for field bus communication in automation technology first implemented in 1989 by BMBF, the german department of education and research; </note-paragraph><note-paragraph>Modbus designates a serial communications protocol published by Modicon in 1979 for use with its programmable logic controller; </note-paragraph><note-paragraph>LIN-Bus (Local Interconnect Network) designates a computer networking bus-system released in 1999 used within current automotive network architectures; </note-paragraph><note-paragraph>FlexRay designates an automotive network communications protocol developed by the FlexRay Consortium; </note-paragraph><note-paragraph>LON or LonWorks designates a network standard operating on twisted pair or electrical wiring or coaxial cable and used for building automation; </note-paragraph><note-paragraph>ASI or AS-Interface (Actuator Sensor Interface) designates the simplest of the industrial networking protocols used in programmable logic controller systems</note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40215" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controller Area Network CAN</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40221" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Profibus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40228" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modbus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40234" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Local Interconnect Network LIN</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40241" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flexray</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40247" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LON</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40254" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Actuator Sensor Interface ASI</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/4026" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/4026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus for use in automation systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/40267" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus for use in transportation systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40273" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transportation system being a vehicle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/4028" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/4028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transportation system being an aircraft</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40286" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transportation system being a waterborne vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/40293" definition-exists="false" ipc-concordant="H04L12/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/40293</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transportation system being a train</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/403" definition-exists="true" ipc-concordant="H04L12/403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with centralised control, e.g. polling</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4035" definition-exists="true" ipc-concordant="H04L12/403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which slots of a TDMA packet structure are assigned based on a contention resolution carried out at a master unit </text><reference><text>TDM/TDMA multiplex systems <u>per se</u> <class-ref scheme="cpc">H04J3/1694</class-ref>; hybrid switching systems <class-ref scheme="cpc">H04L12/64</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/407" definition-exists="true" ipc-concordant="H04L12/407" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/407</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with decentralised control</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/413" definition-exists="true" ipc-concordant="H04L12/413" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/413</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD)</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/4135" definition-exists="true" ipc-concordant="H04L12/413" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4135</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bit-wise arbitration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/417" definition-exists="true" ipc-concordant="H04L12/417" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/417</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with deterministic access, e.g. token passing</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/42" definition-exists="true" ipc-concordant="H04L12/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Loop networks</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/421" definition-exists="false" ipc-concordant="H04L12/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnected ring systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/422" definition-exists="true" ipc-concordant="H04L12/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation for ring networks </text><reference><text>Time Division Multiplex ring networks, e.g. SDH/SONET <class-ref scheme="cpc">H04J3/085</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/423" definition-exists="true" ipc-concordant="H04L12/423" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with centralised control, e.g. polling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/427" definition-exists="true" ipc-concordant="H04L12/427" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/427</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with decentralised control</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/43" definition-exists="true" ipc-concordant="H04L12/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with synchronous transmission, e.g. time division multiplex [TDM], slotted rings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/433" definition-exists="true" ipc-concordant="H04L12/433" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/433</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with asynchronous transmission, e.g. token ring, register insertion</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/437" definition-exists="true" ipc-concordant="H04L12/437" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/437</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ring fault isolation or reconfiguration </text><CPC-specific-text><reference><text>for SDH/SONET ring networks <class-ref scheme="cpc">H04J3/085</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/44" definition-exists="true" ipc-concordant="H04L12/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Star or tree networks</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/445" definition-exists="false" ipc-concordant="H04L12/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with switching in a hub, e.g. ETHERNET switch</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/46" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interconnection of networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/4604" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAN interconnection over a backbone network, e.g. Internet, Frame Relay</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4608" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAN interconnection over ATM networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4612" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAN interconnection over narrowband networks, e.g. N-ISDN, PSTN, X.25</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4616" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4616</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAN interconnection over a LAN backbone</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/462" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAN interconnection over a bridge based backbone</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/4625" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single bridge functionality, e.g. connection of two networks over a single bridge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/4629" definition-exists="false" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/4629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multilayer switching, e.g. layer 3 switching</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/4633" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection of networks using encapsulation techniques, e.g. tunneling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/4637" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnected ring systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/4641" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/4641</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Virtual LANs, VLANs, e.g. virtual private networks [VPN] </text><reference><text>LAN interconnection over a bridge based backbone <class-ref scheme="cpc">H04L12/462</class-ref>; encapsulation techniques <class-ref scheme="cpc">H04L12/4633</class-ref>; routing of packets <class-ref scheme="cpc">H04L45/00</class-ref>; packet switches <class-ref scheme="cpc">H04L49/00</class-ref>; virtual private networks for security <class-ref scheme="cpc">H04L63/0272</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph><CPC-specific-note>This group <u>covers</u>: <subnote type="bullet"><note-paragraph>a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain, regardless of their physical location. </note-paragraph></subnote></CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>This group <u>does not cover</u>: <subnote type="bullet"> <note-paragraph>group multicasting, which is covered by group <class-ref scheme="cpc">H04L12/18</class-ref></note-paragraph><note-paragraph>configuration of switches supporting VLANs, which is covered by group <class-ref scheme="cpc">H04L41/08</class-ref></note-paragraph><note-paragraph>multiprotocol label switching [MPLS], which is covered by group <class-ref scheme="cpc">H04L45/00</class-ref></note-paragraph><note-paragraph>spanning tree protocols [STP], which are covered by group <class-ref scheme="cpc">H04L12/462</class-ref></note-paragraph><note-paragraph>arrangements for network security, which are covered by group <class-ref scheme="cpc">H04L63/0272</class-ref></note-paragraph><note-paragraph>encapsulation techniques, which are covered by group <class-ref scheme="cpc">H04L12/4633</class-ref></note-paragraph><note-paragraph>access arrangements, which are covered by group <class-ref scheme="cpc">H04L12/2856</class-ref></note-paragraph> </subnote> </CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>In this group the following terms or expressions are used with the meaning indicated: <subnote type="bullet"><note-paragraph>B-Tag means Backbone VLAN Tag </note-paragraph><note-paragraph>C-Tag means Customer VLAN Tag </note-paragraph><note-paragraph>GARP means Generic Attribute Registration Protocol </note-paragraph><note-paragraph>GVRP means GARP VLAN Registration Protocol </note-paragraph><note-paragraph>I-SID means Service Instance Identifier </note-paragraph><note-paragraph>MVRP means Multiple VLAN Registration Protocol </note-paragraph><note-paragraph>PBB means Provider Backbone Bridges </note-paragraph><note-paragraph>S-Tag means Service VLAN Tag </note-paragraph><note-paragraph>VLAN means Virtual Local Area Network </note-paragraph><note-paragraph>VPN means Virtual Private Network </note-paragraph><note-paragraph>VTP means VLAN Trunking Protocol</note-paragraph></subnote></CPC-specific-note></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4645" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/4645</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Details on frame tagging </text><reference><text>routing of packets <class-ref scheme="cpc">H04L45/00</class-ref>; support for virtual LAN <class-ref scheme="cpc">H04L49/354</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/465" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a single frame includes a plurality of VLAN tags</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4654" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4654</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a VLAN tag represents a customer VLAN, e.g. C-Tag</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4658" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4658</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a VLAN tag represents a service provider backbone VLAN, e.g. B-Tag, S-Tag</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4662" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a VLAN tag represents a service instance, e.g. I-SID in PBB</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/4666" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operational details on the addition or the stripping of a tag in a frame, e.g. at a provider edge node</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/467" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for supporting untagged frames, e.g. port-based VLANs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/4675" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>H04L12/4675</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>Dynamic sharing of VLAN information amongst network nodes </text><reference><text>configuration of the network or of network elements <class-ref scheme="cpc">H04L41/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/4679" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4679</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for the registration or de-registration of VLAN attribute values, e.g. VLAN identifiers, port VLAN membership</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L12/4683" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4683</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the protocol used</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4687" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>MVRP [multiple VLAN registration protocol]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4691" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4691</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>GVRP [GARP VLAN registration protocol]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L12/4695" definition-exists="true" ipc-concordant="H04L12/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/4695</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>VTP [VLAN trunking protocol]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/50" definition-exists="false" ipc-concordant="H04L12/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>H04L12/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit switching systems, i.e. systems in which the path is physically permanent during the communication</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/52" definition-exists="false" ipc-concordant="H04L12/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using time division techniques </text><reference><text>in digital transmission systems <class-ref scheme="cpc">H04L5/22</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/525" definition-exists="false" ipc-concordant="H04L12/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/525</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a stored program control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/54" definition-exists="true" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L12/54</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Store-and-forward switching systems  </text><reference><text>packet switching systems <class-ref scheme="cpc">H04L45/00</class-ref>, <class-ref scheme="cpc">H04L47/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/56" definition-exists="true" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Packet switching systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/5601" definition-exists="true" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/5601</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transfer mode dependent, e.g. ATM</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/5602" definition-exists="false" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/5602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bandwidth control in ATM Networks, e.g. leaky bucket</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5603" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5603</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5604" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Medium of transmission, e.g. fibre, cable, radio</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5605" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5606" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Metallic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5607" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Radio</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5608" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Satellite</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5609" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5609</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Topology</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/561" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/561</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5612" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5613" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5613</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus (including DQDB)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5614" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>User Network Interface</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5615" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network termination, e.g. NT1, NT2, PBX</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5616" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5616</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Terminal equipment, e.g. codecs, synch.</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5617" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual LANs; Emulation of LANs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5618" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bridges, gateways [GW] or interworking units [IWU]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5619" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5619</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network Node Interface, e.g. tandem connections, transit switching</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/562" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/562</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5621" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual private network [VPN]; Private-network - network-interface (P-NNI)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5623" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network design, dimensioning, topology or optimisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5624" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Path aspects, e.g. path bundling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5625" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operations, administration and maintenance [OAM]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5626" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network management, e.g. Intelligent nets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5627" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fault tolerance and recovery</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5628" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5629" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Admission control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/563" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signalling, e.g. protocols, reference model</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5631" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resource management and allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5632" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5632</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bandwidth allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/5634" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5634</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>In-call negotiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/5635" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Backpressure, e.g. for ABR</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5636" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monitoring or policing, e.g. compliance with allocated rate, corrective actions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/5637" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Leaky Buckets</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5638" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Services, e.g. multimedia, GOS, QOS</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5639" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5639</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tariffs or charging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/564" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connection-oriented</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5641" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5641</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unicast/point-to-point</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5642" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicast/broadcast/point-multipoint, e.g. VOD</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5643" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Concast/multipoint-to-point</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5645" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connectionless</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5646" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5646</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell characteristics, e.g. loss, delay, jitter, sequence integrity</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5647" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell loss</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/5648" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5648</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Packet discarding, e.g. EPD, PTD</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5649" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5649</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell delay or jitter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/565" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sequence integrity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5651" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5651</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Priority, marking, classes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5652" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/5653" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the ATM adaptation layer [AAL]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5654" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5654</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the AAL1</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5656" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the AAL2</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5657" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the AAL3/4</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5658" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5658</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the AAL5</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5659" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5659</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>usint the AALX</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L12/566" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the ATM layer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5661" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Minicells</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L12/5662" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Macrocells or frames</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5663" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Support of N-ISDN</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5664" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Support of Video, e.g. MPEG</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5665" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5665</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interaction of ATM with other protocols</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5667" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5667</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>IP over ATM</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5668" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Next hop resolution protocol [NHRP]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5669" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5669</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiprotocol over ATM [MPOA]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/567" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/567</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frame Relay over ATM</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5671" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Support of voice</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5672" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplexing, e.g. coding, scrambling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5673" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coding or scrambling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5674" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5674</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation, timing recovery or alignment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5675" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timeslot assignment, e.g. TDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5676" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code Division Multiple Access [CDMA]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5678" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5679" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5679</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arbitration or scheduling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/568" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Load balancing, smoothing or shaping</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5681" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Buffer or queue management</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5682" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5682</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Threshold; Watermark</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L12/5683" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5683</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for avoiding head of line blocking</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/5684" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characteristics of traffic flows</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5685" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Addressing issues</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5686" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5686</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Use of neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/5687" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L2012/5687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Security aspects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L12/5691" definition-exists="false" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/5691</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access to open networks; Ingress point selection, e.g. ISP selection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L12/5692" definition-exists="false" ipc-concordant="H04L12/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/5692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Selection among different networks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/64" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hybrid switching systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/6402" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/6402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hybrid switching fabrics</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6405" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Space</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6408" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shared Medium, e.g. memory, bus, ring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/641" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/641</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time switching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6413" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switch peripheries</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6416" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switch multicast</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L12/6418" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/6418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hybrid transport</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6421" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Medium of transmission, e.g. fibre, cable, radio, satellite</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6424" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6427" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subscriber Access Module; Concentrator; Group equipment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6429" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Terminal adapters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6432" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Topology</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6435" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6437" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6437</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/644" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Star</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6443" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network Node Interface, e.g. Routing, Path finding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6445" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Admission control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6448" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Medium Access Control [MAC]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/6451" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6451</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deterministic, e.g. Token, DQDB</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L12/6454" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Random, e.g. Ethernet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6456" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel and bandwidth allocation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6459" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplexing, e.g. TDMA, CDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L12/6462" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Movable boundaries in packets or frames</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6464" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Priority</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6467" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Information loss recovery, e.g. error correction, prediction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/647" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frame Relay, X.25</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6472" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Internet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6475" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>N-ISDN, Public Switched Telephone Network [PSTN]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6478" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital subscriber line, e.g. DSL, ADSL, HDSL, XDSL, VDSL</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6481" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Speech, voice</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6483" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Video, e.g. MPEG</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6486" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signalling Protocols</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6489" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Buffer Management, Threshold setting, Scheduling, Shaping</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6491" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Echo cancellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6494" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Silence suppression</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L12/6497" definition-exists="false" ipc-concordant="H04L12/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2012/6497</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Feedback to the source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L12/66" definition-exists="false" ipc-concordant="H04L12/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L12/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for connecting between networks having differing types of switching systems, e.g. gateways</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L13/00" definition-exists="true" ipc-concordant="H04L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of the apparatus or circuits covered by groups <class-ref scheme="cpc">H04L15/00</class-ref> or <class-ref scheme="cpc">H04L17/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L13/02" definition-exists="false" ipc-concordant="H04L13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details not particular to receiver or transmitter</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/04" definition-exists="true" ipc-concordant="H04L13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L13/04</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Driving mechanisms</text></title-part><title-part><text>Clutches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/06" definition-exists="false" ipc-concordant="H04L13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tape or page guiding or feeding devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/08" definition-exists="false" ipc-concordant="H04L13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Intermediate storage means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/10" definition-exists="false" ipc-concordant="H04L13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Distributors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L13/12" definition-exists="false" ipc-concordant="H04L13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-mechanical distributors, e.g. relay distributors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L13/14" definition-exists="true" ipc-concordant="H04L13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L13/14</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Electronic distributors</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L13/16" definition-exists="false" ipc-concordant="H04L13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of transmitters, e.g. code-bars, code-discs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L13/18" definition-exists="false" ipc-concordant="H04L13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/182" definition-exists="false" ipc-concordant="H04L13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Printing mechanisms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L13/184" definition-exists="false" ipc-concordant="H04L13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Photographic printing and recording</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/186" definition-exists="false" ipc-concordant="H04L13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Page printing; tabulating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L13/188" definition-exists="false" ipc-concordant="H04L13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L13/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Projection of the printed matter</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L15/00" definition-exists="true" ipc-concordant="H04L15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L15/00</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code </text><reference><text>teaching apparatus therefor <class-ref scheme="cpc">G09B</class-ref>; telegraph tapping keys <class-ref scheme="cpc">H01H21/86</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L15/03" definition-exists="false" ipc-concordant="H04L15/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Keys structurally combined with sound generators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L15/04" definition-exists="false" ipc-concordant="H04L15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or circuits at the transmitting end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/06" definition-exists="false" ipc-concordant="H04L15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a restricted number of keys, e.g. separate key for each type of code element</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/08" definition-exists="false" ipc-concordant="H04L15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a single key which transmits dots in one position and dashes in a second position</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/10" definition-exists="false" ipc-concordant="H04L15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with perforating apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/12" definition-exists="false" ipc-concordant="H04L15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with keyboard co-operating with code-bars</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/14" definition-exists="false" ipc-concordant="H04L15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with perforating apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/16" definition-exists="false" ipc-concordant="H04L15/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with keyboard co-operating with code discs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/18" definition-exists="false" ipc-concordant="H04L15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic transmitters, e.g. controlled by perforated tape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/20" definition-exists="false" ipc-concordant="H04L15/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with optical sensing means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/22" definition-exists="false" ipc-concordant="H04L15/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L15/24" definition-exists="false" ipc-concordant="H04L15/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or circuits at the receiving end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/26" definition-exists="false" ipc-concordant="H04L15/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L15/26</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/28" definition-exists="false" ipc-concordant="H04L15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Code reproducing apparatus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/285" definition-exists="false" ipc-concordant="H04L15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Telegraph sounders; Apparatus for acoustic reception</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/30" definition-exists="false" ipc-concordant="H04L15/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Writing recorders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L15/32" definition-exists="false" ipc-concordant="H04L15/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Perforating recorders</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L15/34" definition-exists="false" ipc-concordant="H04L15/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L15/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus for recording received coded signals after translation, e.g. as type-characters</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L17/00" definition-exists="true" ipc-concordant="H04L17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L17/00</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L17/02" definition-exists="false" ipc-concordant="H04L17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or circuits at the transmitting end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/04" definition-exists="false" ipc-concordant="H04L17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with keyboard co-operating with code-bars</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L17/06" definition-exists="false" ipc-concordant="H04L17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Contact operating means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L17/08" definition-exists="false" ipc-concordant="H04L17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with perforating apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/10" definition-exists="false" ipc-concordant="H04L17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with keyboard co-operating with code-discs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/12" definition-exists="false" ipc-concordant="H04L17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic transmitters, e.g. controlled by perforated tape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L17/14" definition-exists="false" ipc-concordant="H04L17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with optical sensing means</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L17/16" definition-exists="false" ipc-concordant="H04L17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or circuits at the receiving end</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/18" definition-exists="false" ipc-concordant="H04L17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Code selection mechanisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/20" definition-exists="false" ipc-concordant="H04L17/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using perforating recorders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/22" definition-exists="false" ipc-concordant="H04L17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical translation and type-bar printing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/24" definition-exists="false" ipc-concordant="H04L17/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical translation and type-head printing, e.g. type-wheel, type-cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/26" definition-exists="false" ipc-concordant="H04L17/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using aggregate motion translation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/28" definition-exists="false" ipc-concordant="H04L17/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pneumatic or hydraulic translation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L17/30" definition-exists="false" ipc-concordant="H04L17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L17/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electric or electronic translation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L19/00" definition-exists="false" ipc-concordant="H04L19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or local circuits for step-by-step systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L21/00" definition-exists="false" ipc-concordant="H04L21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or local circuits for mosaic printer telegraph systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L21/02" definition-exists="false" ipc-concordant="H04L21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the transmitting end</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L21/04" definition-exists="false" ipc-concordant="H04L21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L21/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the receiving end</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L23/00" definition-exists="true" ipc-concordant="H04L23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04L23/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Apparatus or local circuits for systems other than those covered by groups <class-ref scheme="cpc">H04L15/00</class-ref> - <class-ref scheme="cpc">H04L21/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L23/02" definition-exists="true" ipc-concordant="H04L23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adapted for orthogonal signalling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L25/00" definition-exists="true" ipc-concordant="H04L25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Baseband systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L25/02" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L25/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Details </text><CPC-specific-text><text>; arrangements for supplying electrical power along data transmission lines </text><reference><text>systems for transmitting signals via power distribution lines <class-ref scheme="cpc">H04B3/54</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/0202" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel estimation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0204" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of multiple channels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0206" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of each channel individually</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0208" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the composite channel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/021" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Estimation of channel covariance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0212" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of impulse response</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0214" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a single coefficient</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0216" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with estimation of channel length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0218" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with detection of nulls</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/022" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of frequency response</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0222" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0224" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sounding signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0226" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sounding signals <u>per se</u></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0228" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with direct estimation from sounding signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/023" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with extension to other symbols</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/0232" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by interpolation between sounding signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/0234" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by non-linear interpolation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/0236" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using estimation of the other symbols</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0238" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using blind estimation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/024" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>channel estimation algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0242" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using matrix methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0244" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with inversion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0246" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with factorisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0248" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Eigen-space methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/025" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using least-mean-square [LMS] method</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0252" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using third or higher order statistics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0254" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using neural network algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0256" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel estimation using minimum mean square error criteria</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0258" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel estimation using zero-forcing criteria</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/026" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for coupling transmitters, receivers or transceivers to transmission lines; Line drivers </text><reference><text>duplexing arrangements <class-ref scheme="cpc">H04L5/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/0262" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for detecting the data rate of an incoming signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/0264" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>H04L25/0264</classification-symbol><class-title date-revised="2015-11-01"><title-part><CPC-specific-text><text>Arrangements for coupling to transmission lines </text><reference><text>duplexing arrangements <class-ref scheme="cpc">H04L5/14</class-ref>; line equalisers, line build-out devices <class-ref scheme="cpc">H04L25/03878</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0266" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0268" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with modulation and subsequent demodulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/027" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specifically for telegraph signals </text><reference><text>induction coil interrupters <class-ref scheme="cpc">H01H51/34</class-ref> dynamo-electric generators <class-ref scheme="cpc">H02K</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0272" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for coupling to multiple lines, e.g. for differential transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0274" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for ensuring balanced coupling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0276" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for coupling common mode signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0278" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for impedance matching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/028" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements specific to the transmitter end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0282" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision for current-mode coupling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0284" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements to ensure DC-balance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0286" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision of wave shaping within the driver </text><reference><text>wave shaping <u>per se</u> <class-ref scheme="cpc">H04L25/03834</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0288" definition-exists="true" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the shape being matched to the transmission line </text><reference><text>pre-equalisation <u>per se</u> <class-ref scheme="cpc">H04L25/03343</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/029" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision of high-impedance states</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0292" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements specific to the receiver end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0294" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision for current-mode coupling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/0296" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements to ensure DC-balance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0298" definition-exists="false" ipc-concordant="H04L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0298</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement for terminating transmission lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/03" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L25/03</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Shaping networks in transmitter or receiver, e.g. adaptive shaping networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03006" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for removing intersymbol interference</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03012" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating in the time domain </text><reference><text><class-ref scheme="cpc">H04L25/03165</class-ref>, <class-ref scheme="cpc">H04L25/03178</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03019" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adaptive, i.e. capable of adjustment during data reception</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03025" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a two-tap delay line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03031" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only passive components </text><reference><text><class-ref scheme="cpc">H04L25/03025</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03038" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a non-recursive structure </text><reference><text><class-ref scheme="cpc">H04L25/03031</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03044" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fractionally spaced delay lines or combinations of fractionally integrally spaced taps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/0305" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using blind adaptation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03057" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a recursive structure </text><reference><text><class-ref scheme="cpc">H04L25/03031</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03063" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fractionally spaced delay lines or combinations of fractionally and integrally spaced taps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/0307" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using blind adaptation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03076" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>not using decision feedback</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03082" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects of adaptive time domain methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03089" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theory of blind algorithms, recursive or not</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03095" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theory of fractional equalisers, recursive or not</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03101" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theory of the Kalman algorithm</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03108" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theory of recursive equalisers, other than Kalman</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03114" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03114</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03121" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a two-tap delay line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03127" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only passive components </text><reference><text><class-ref scheme="cpc">H04L25/03121</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03133" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a non-recursive structure </text><reference><text><class-ref scheme="cpc">H04L25/03127</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/0314" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fractionally spaced delay lines or combinations of fractionally integrally spaced taps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03146" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a recursive structure </text><reference><text><class-ref scheme="cpc">H04L25/03127</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03152" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03152</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects of non-adaptive time domain methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03159" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03159</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating in the frequency domain </text><reference><text><class-ref scheme="cpc">H04L25/03165</class-ref>, <class-ref scheme="cpc">H04L25/03178</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03165" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03171" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements involving maximum a posteriori probability [MAP] detection</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group contains provisionally all documents which deal with turbo equalisation</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03178" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements involving sequence estimation techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03184" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details concerning the metric</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03191" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03191</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the receiver makes a selection between different metrics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03197" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03197</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>methods of calculation involving metrics</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03203" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Trellis search techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/0321" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sorting arrangements therefor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03216" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the M-algorithm</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03222" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the T-algorithm</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03229" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03229</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with state-reduction using grouping of states</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03235" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with state-reduction using feedback filtering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03242" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods involving sphere decoding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03248" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for operating in conjunction with other apparatus</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>covers</u> arrangements in which the sequence estimator is specially adapted to provide signals to, or receive signals from, the other apparatus. The group <u>does not cover</u> the mere juxtaposition of elements</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03254" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation with other circuitry for removing intersymbol interference</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03261" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with impulse-response shortening filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/03267" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with decision feedback equalisers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03273" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with carrier recovery circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/0328" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with interference cancellation circuitry </text><reference><text>adaptations for interference cancellation within a sequence estimator <class-ref scheme="cpc">H04L25/03305</class-ref>; interference related aspects of direct sequence spread spectrum <class-ref scheme="cpc">H04B1/7097</class-ref>; interference related aspects of frequency hopping spread spectrum <class-ref scheme="cpc">H04B1/715</class-ref>; <u>see</u> also <class-ref scheme="cpc">H04B1/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03286" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with channel-decoding circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03292" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with channel estimation circuitry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03299" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03299</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with noise-whitening circuitry</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03305" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Joint sequence estimation and interference removal </text><reference><text>joint detection of several desired signals <class-ref scheme="cpc">H04L25/03331</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03312" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03312</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements specific to the provision of output signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03318" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision of soft decisions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03324" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provision of tentative decisions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03331" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03331</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for the joint estimation of multiple sequences</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03337" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements involving per-survivor processing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03343" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements at the transmitter end</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L25/0335" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the type of transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03356" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03356</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Baseband transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03363" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilevel </text><reference><text><class-ref scheme="cpc">H04L2025/03369</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03369" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03369</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Partial response</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03375" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passband transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03382" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03382</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single of vestigal sideband</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03388" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03388</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ASK</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03394" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03394</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>FSK</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03401" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PSK</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03407" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Continuous phase</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03414" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicarrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/0342" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>QAM</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03426" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>transmission using multiple-input and multiple-output channels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L25/03433" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by equaliser structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03439" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03439</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixed structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03445" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time domain</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03452" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systolic arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03458" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lattice</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03464" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03471" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L2025/03471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tapped delay lines </text><reference><text><class-ref scheme="cpc">H04L2025/03464</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03477" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>not time-recursive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03484" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>time-recursive</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="16" additional-only="true" sort-key="H04L25/0349" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0349</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a feedback filter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="16" additional-only="true" sort-key="H04L25/03496" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a prediction filter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="16" additional-only="true" sort-key="H04L25/03503" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a combination of feedback and prediction filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03509" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03509</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fractionally spaced </text><reference><text><class-ref scheme="cpc">H04L2025/03515</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03515" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>irregularly spaced</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03522" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency domain</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03528" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Other transform domain</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03535" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03541" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching between domains, e.g. between time and frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03547" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching between time domain structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03554" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03554</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between neural networks and tapped delay lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/0356" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0356</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching the time direction of equalisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03566" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between different tapped delay line structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03573" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03573</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between recursive and non-recursive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03579" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03579</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifying the tap spacing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03585" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifying the length</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L25/03592" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptation methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03598" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03598</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03605" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Block algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03611" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Iterative algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03617" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L2025/03617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time recursive algorithms </text><reference><text><class-ref scheme="cpc">H04L2025/03643</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03624" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zero-forcing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/0363" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Feature restoration, e.g. constant modulus</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03636" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Algorithms using least mean square [LMS]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03643" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Order recursive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03649" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03649</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Algorithms using recursive least square [RLS]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03656" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Initialisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03662" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to a fixed value</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03668" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to the value at the end of a previous adaptation period</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03675" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blind algorithms using gradient methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03681" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of adaptation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03687" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of step size</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="15" additional-only="true" sort-key="H04L25/03694" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stop and go</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/037" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection of convergence state</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/03707" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03707</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection or avoidance of local extrema</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03713" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03713</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subspace algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03719" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03719</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Super-exponential</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03726" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03726</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching between algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03732" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03732</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>according to the convergence state</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03738" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03738</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manual adaptation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03745" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03745</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Timing of adaptation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03751" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L2025/03751</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>only once, at installation </text><reference><text><class-ref scheme="cpc">H04L2025/03738</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03757" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03757</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>only on the request of a user</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03764" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03764</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>only during predefined intervals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="H04L25/0377" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/0377</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during the reception of training signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L25/03777" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03777</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the signalling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03783" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03783</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of reference signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03789" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03789</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Codes therefore</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03796" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03796</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Location of reference signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L25/03802" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signalling on the reverse channel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03808" definition-exists="true" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of equaliser coefficients</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H04L25/03815" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2025/03815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of a training request</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03821" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-carrier interference cancellation [ICI]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03828" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties </text><reference><text>partial response systems <class-ref scheme="cpc">H04L25/497</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03834" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03834</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse shaping</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0384" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0384</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Design of pulse shapes </text><reference><text>pulse shape for impulse radio <class-ref scheme="cpc">H04B1/7172</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03847" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shaping by selective switching of amplifying elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03853" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shaping by digital methods other than look up tables or up/down converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03859" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>shaping using look up tables for partial waveforms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03866" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using scrambling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03872" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel scrambling or descrambling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03878" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Line equalisers; line build-out devices</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03885" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adaptive</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03891" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spatial equalizers </text><reference><text>MIMO diversity systems <class-ref scheme="cpc">H04B7/0413</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03898" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>codebook-based design </text><reference><text>selection of codebook or precoding matrix for MIMO diversity systems <class-ref scheme="cpc">H04B7/0456</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03904" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03904</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cooperative design, e.g. exchanging of codebook information between base stations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/0391" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0391</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>construction details of matrices</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03917" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03917</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>according to the size of the codebook</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/03923" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03923</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>according to the rank</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03929" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03929</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with layer mapping, e.g. codeword-to layer design </text><reference><text>for space-time coding <class-ref scheme="cpc">H04L1/0618</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03936" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03936</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>multi-resolution codebooks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03942" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03942</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>switching between different codebooks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03949" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03949</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>equalizer selection or adaptation based on feedback </text><reference><text>multiple signaling inclusive of a precoding command for adapting the transmitter <class-ref scheme="cpc">H04L1/0031</class-ref>; feedback for transmit diversity systems <class-ref scheme="cpc">H04B7/0619</class-ref>; selection of codebook or precoding matrix for MIMO diversity systems <class-ref scheme="cpc">H04B7/0456</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03955" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with downlink estimations, e.g. downlink path losses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/03961" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03961</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>design criteria</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03968" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03968</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mean-square error [MSE]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/03974" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03974</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>throughput maximization</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/0398" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/0398</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Restoration of channel reciprocity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03987" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03987</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Equalisation for sparse channels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/03993" definition-exists="false" ipc-concordant="H04L25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/03993</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Noise whitening</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/05" definition-exists="false" ipc-concordant="H04L25/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/06" definition-exists="true" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/06</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Dc level restoring means</text></title-part><title-part><text>Bias distortion correction </text><CPC-specific-text><text>; Decision circuits providing symbol by symbol detection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/061" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset </text><reference><text>removal of dc offset in coupling arrangements <class-ref scheme="cpc">H04L25/029</class-ref>, <class-ref scheme="cpc">H04L25/0296</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/062" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Setting decision thresholds using feedforward techniques only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/063" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Setting decision thresholds using feedback techniques only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/064" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subtraction of the threshold from the signal, which is then compared to a supplementary fixed threshold</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/065" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Binary decisions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/066" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilevel decisions, not including self-organising maps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/067" definition-exists="true" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing soft decisions, i.e. decisions together with an estimate of reliability </text><reference><text><class-ref scheme="cpc">H04L25/068</class-ref> and <class-ref scheme="cpc">H04L25/069</class-ref> take precedence; sequence estimation techniques <class-ref scheme="cpc">H04L25/03178</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/068" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by sampling faster than the nominal bit rate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/069" definition-exists="false" ipc-concordant="H04L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by detecting edges or zero crossings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/08" definition-exists="false" ipc-concordant="H04L25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L25/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Modifications for reducing interference</text></title-part><title-part><text>Modifications for reducing effects due to line faults </text><CPC-specific-text><text>; Receiver end arrangements for detecting or overcoming line faults</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/085" definition-exists="false" ipc-concordant="H04L25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for reducing interference in line transmission systems, e.g. by differential transmission</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/10" definition-exists="true" ipc-concordant="H04L25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/10</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Compensating for variations in line balance</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/12" definition-exists="true" ipc-concordant="H04L25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/12</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Compensating for variations in line impedance</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/14" definition-exists="true" ipc-concordant="H04L25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/14</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Channel dividing arrangements </text><CPC-specific-text><text>, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/20" definition-exists="false" ipc-concordant="H04L25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Repeater circuits</text></title-part><title-part><text>Relay circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/202" definition-exists="false" ipc-concordant="H04L25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical devices </text><reference><text><class-ref scheme="cpc">H04L25/205</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/205" definition-exists="false" ipc-concordant="H04L25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tuning forks or vibrating reeds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/207" definition-exists="false" ipc-concordant="H04L25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electromagnetic switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/22" definition-exists="true" ipc-concordant="H04L25/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/22</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Repeaters for converting two wires to four wires</text></title-part><title-part><text>Repeaters for converting single current to double current</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/24" definition-exists="false" ipc-concordant="H04L25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relay circuits using discharge tubes or semiconductor devices </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H04L25/22</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/242" definition-exists="false" ipc-concordant="H04L25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with retiming</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/245" definition-exists="false" ipc-concordant="H04L25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for start-stop signals </text><reference><text>detection of start or stop bits <class-ref scheme="cpc">H04J3/0602</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/247" definition-exists="false" ipc-concordant="H04L25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for synchronous signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/26" definition-exists="false" ipc-concordant="H04L25/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L25/26</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Circuits with optical sensing means </text><CPC-specific-text><text>, i.e. using opto-couplers for isolation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L25/38" definition-exists="false" ipc-concordant="H04L25/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synchronous or start-stop systems, e.g. for Baudot code</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L25/40" definition-exists="true" ipc-concordant="H04L25/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/40</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Transmitting circuits</text></title-part><title-part><text>Receiving circuits </text><CPC-specific-text><reference><text>repeater circuits, relay circuits <class-ref scheme="cpc">H04L25/20</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/42" definition-exists="false" ipc-concordant="H04L25/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical distributors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/44" definition-exists="false" ipc-concordant="H04L25/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using relay distributors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/45" definition-exists="true" ipc-concordant="H04L25/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/45</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>using electronic distributors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/46" definition-exists="false" ipc-concordant="H04L25/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tuning forks or vibrating reeds</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L25/49" definition-exists="true" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04L25/49</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using code conversion at the transmitter</text></title-part><title-part><text>using predistortion</text></title-part><title-part><text>using insertion of idle bits for obtaining a desired frequency spectrum</text></title-part><title-part><text>using three or more amplitude levels </text><CPC-specific-text><text>; Baseband coding techniques specific to data transmission systems </text><reference><text>spectral shaping <class-ref scheme="cpc">H04L25/03828</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/4902" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4902</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pulse width modulation; Pulse position modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/4904" definition-exists="true" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4904</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using self-synchronising codes, e.g. split-phase codes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/4906" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4906</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using binary codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4908" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4908</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mBnB codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/491" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using 1B2B codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L25/4912" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4912</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using CMI or 2-HDB-3 code</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4915" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pattern inversion or substitution </text><reference><text><class-ref scheme="cpc">H04L25/4908</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/4917" definition-exists="true" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4917</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multilevel codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4919" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4919</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using balanced multilevel codes </text><reference><text><class-ref scheme="cpc">H04L25/4927</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/4921" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4921</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using quadrature encoding, e.g. carrierless amplitude-phase coding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4923" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4923</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ternary codes </text><reference><text><class-ref scheme="cpc">H04L25/4927</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L25/4925" definition-exists="false" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using balanced bipolar ternary codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4927" definition-exists="true" ipc-concordant="H04L25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using levels matched to the quantisation levels of the channel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/493" definition-exists="false" ipc-concordant="H04L25/493" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/493</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by transition coding, i.e. the time-position or direction of a transition being encoded before transmission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L25/497" definition-exists="true" ipc-concordant="H04L25/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L25/497</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>by correlative coding, e.g. partial response coding or echo modulation coding </text><CPC-specific-text><text>transmitters and receivers for partial response systems </text><reference><text>transversal equalizers at the transmitter end <class-ref scheme="cpc">H04L25/03343</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L25/4975" definition-exists="false" ipc-concordant="H04L25/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L25/4975</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correlative coding using Tomlinson precoding, Harashima precoding, Trellis precoding or GPRS</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L27/00" definition-exists="true" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L27/00</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Modulated-carrier systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0002" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line </text><reference><text>duplex arrangements <class-ref scheme="cpc">H04L5/143</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0004" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using wavelets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0006" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio </text><reference><text>for spectrum sharing between different networks <class-ref scheme="cpc">H04W16/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0008" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements for allowing a transmitter or receiver to use more than one type of modulation </text><reference><text>negotiating modulation type for two-way transmission paths <class-ref scheme="cpc">H04L5/1453</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/001" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using chaotic signals </text><reference><text>for secret or secure communication <class-ref scheme="cpc">H04L9/001</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0012" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements for identifying the type of modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/0014" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Carrier regulation </text><reference><text>of chaotic carriers <class-ref scheme="cpc">H04L27/001</class-ref>; for multicarrier receivers <class-ref scheme="cpc">H04L27/2657</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L27/0016" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stabilisation of local oscillators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L27/0018" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements at the transmitter end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/002" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using feedback from a remote receiver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0022" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the carrier of the associated receiver of a transceiver</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L27/0024" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the receiver end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0026" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correction of carrier offset</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0028" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at passband only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/003" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at baseband only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0032" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at baseband and passband</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0034" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using hypothesis testing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0036" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a recovered symbol clock</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0038" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an equaliser</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L27/004" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the equaliser providing control signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L27/0042" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the equaliser providing the offset correction <u>per se</u></text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L27/0044" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control loops for carrier regulation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0046" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Open loops</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0048" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency multiplication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0051" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Harmonic tracking</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0053" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Closed loops</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0055" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>single phase</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0057" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>quadrature phase</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0059" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>more than two phases</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0061" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>remodulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0063" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Elements of loops</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0065" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency error detectors </text><reference><text><class-ref scheme="cpc">H04L2027/0067</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0067" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Phase error detectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0069" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Loop filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0071" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of loops</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0073" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection of synchronisation state</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0075" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error weighting</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L27/0077" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>stop and go</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0079" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching between loops</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L27/0081" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between loops of different bandwidths</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L27/0083" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signalling arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0085" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with no special signals for synchronisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0087" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Out-of-band signals, (e.g. pilots)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0089" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>In-band signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0091" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Continuous signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04L27/0093" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermittant signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H04L27/0095" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a preamble or similar structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L27/0097" definition-exists="false" ipc-concordant="H04L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2027/0097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive synchronisation signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/01" definition-exists="true" ipc-concordant="H04L27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L27/01</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Equalisers </text><CPC-specific-text><reference><text>baseband equalizers at the transmitter end <class-ref scheme="cpc">H04L25/03343</class-ref>; in analogue transmission systems <class-ref scheme="cpc">H04B3/04</class-ref>, <class-ref scheme="cpc">H04B7/005</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/02" definition-exists="false" ipc-concordant="H04L27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude-modulated carrier systems, e.g. using on-off keying</text></title-part><title-part><text>Single sideband or vestigial sideband modulation </text><reference><text><class-ref scheme="cpc">H04L27/32</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/04" definition-exists="false" ipc-concordant="H04L27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/04</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Modulator circuits</text></title-part><title-part><text>Transmitter circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/06" definition-exists="true" ipc-concordant="H04L27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Demodulator circuits</text></title-part><title-part><text>Receiver circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/063" definition-exists="false" ipc-concordant="H04L27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Superheterodyne receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/066" definition-exists="false" ipc-concordant="H04L27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Carrier recovery circuits </text><reference><text><class-ref scheme="cpc">H04L27/2271</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/08" definition-exists="false" ipc-concordant="H04L27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude regulation arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/10" definition-exists="true" ipc-concordant="H04L27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H04L27/10</classification-symbol><class-title date-revised="2021-08-01"><title-part><text>Frequency-modulated carrier systems, i.e. using frequency-shift keying </text><reference><text><class-ref scheme="cpc">H04L27/32</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/103" definition-exists="true" ipc-concordant="H04L27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L27/103</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Chirp modulation </text><reference><text>for spread spectrum techniques <class-ref scheme="cpc">H04B1/69</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/106" definition-exists="false" ipc-concordant="H04L27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>M-ary FSK</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/12" definition-exists="true" ipc-concordant="H04L27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L27/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Modulator circuits</text></title-part><title-part><text>Transmitter circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/122" definition-exists="false" ipc-concordant="H04L27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital generation of carrier signals </text><reference><text>digital function generators <class-ref scheme="cpc">G06F1/02</class-ref>, <class-ref scheme="cpc">H04L17/10</class-ref>; generating pulses having stepped portions using digital techniques <class-ref scheme="cpc">H03K4/026</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/125" definition-exists="false" ipc-concordant="H04L27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a controlled oscillator in an open loop</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/127" definition-exists="false" ipc-concordant="H04L27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a controlled oscillator in a feedback loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/14" definition-exists="true" ipc-concordant="H04L27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L27/14</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Demodulator circuits</text></title-part><title-part><text>Receiver circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/142" definition-exists="false" ipc-concordant="H04L27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compensating direct current components occurring during the demodulation and which are caused by mistuning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/144" definition-exists="false" ipc-concordant="H04L27/144" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/148" definition-exists="false" ipc-concordant="H04L27/148" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using filters, including PLL-type filters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/152" definition-exists="false" ipc-concordant="H04L27/152" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/152</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using controlled oscillators, e.g. PLL arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/1525" definition-exists="false" ipc-concordant="H04L27/152" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/1525</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using quadrature demodulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/156" definition-exists="false" ipc-concordant="H04L27/156" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/156</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with demodulation using temporal properties of the received signal, e.g. detecting pulse width</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/1563" definition-exists="false" ipc-concordant="H04L27/156" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/1563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transition or level detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/1566" definition-exists="false" ipc-concordant="H04L27/156" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/1566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using synchronous sampling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/16" definition-exists="false" ipc-concordant="H04L27/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency regulation arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/18" definition-exists="false" ipc-concordant="H04L27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/18</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Phase-modulated carrier systems, i.e. using phase-shift keying </text><reference><text><class-ref scheme="cpc">H04L27/32</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/183" definition-exists="false" ipc-concordant="H04L27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiresolution systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/186" definition-exists="false" ipc-concordant="H04L27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the information is carried by both the individual signal points and the subset to which the individual signal points belong, e.g. coset coding or related schemes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/20" definition-exists="true" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/20</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Modulator circuits</text></title-part><title-part><text>Transmitter circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2003" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuous phase modulation </text><reference><text>frequency shift keying <class-ref scheme="cpc">H04L27/10</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2007" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase change within each symbol period is constrained </text><reference><text>coset coding <class-ref scheme="cpc">H04L27/186</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/201" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the allowed phase changes vary with time, e.g. multi-h modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2014" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying </text><reference><text><class-ref scheme="cpc">H04L27/201</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2017" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation </text><reference><text><class-ref scheme="cpc">H04L27/201</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2021" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase change per symbol period is not constrained</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2025" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase changes in a piecewise linear manner within each symbol period</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2028" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase changes are non-linear</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2032" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2035" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single or unspecified number of carriers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2039" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using microwave technology</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2042" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than two phase states</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2046" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the data are represented by carrier phase</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/205" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the data are represented by the change in phase of the carrier</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2053" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using more than one carrier, e.g. carriers with different phases</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2057" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a separate carrier for each phase state</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/206" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a pair of orthogonal carriers, e.g. quadrature carriers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2064" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using microwave technology</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2067" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than two phase states </text><reference><text><class-ref scheme="cpc">H04L27/2064</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2071" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the data are represented by the carrier phase, e.g. systems with differential coding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2075" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the data are represented by the change in carrier phase</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2078" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the phase change per symbol period is constrained </text><reference><text>coset coding <class-ref scheme="cpc">H04L27/186</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H04L27/2082" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for offset or staggered quadrature phase shift keying</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2085" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than one phase shift per symbol period</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2089" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with unbalanced quadrature channels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2092" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with digital generation of the modulated carrier (does not include the modulation of a digitally generated carrier)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2096" definition-exists="false" ipc-concordant="H04L27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for directly or externally modulating an optical carrier </text><reference><text>optical modulation <class-ref scheme="cpc">H04B10/503</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/22" definition-exists="true" ipc-concordant="H04L27/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Demodulator circuits</text></title-part><title-part><text>Receiver circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/223" definition-exists="false" ipc-concordant="H04L27/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Demodulation in the optical domain </text><reference><text>optical demodulation <class-ref scheme="cpc">H04B10/676</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/227" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using coherent demodulation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2271" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the carrier recovery circuit uses only the demodulated signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2272" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phase locked loops </text><reference><text><class-ref scheme="cpc">H04L27/2273</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2273" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>associated with quadrature demodulation, e.g. Costas loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2275" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the carrier recovery circuit uses the received modulated signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2276" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using frequency multiplication or harmonic tracking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2277" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using remodulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2278" definition-exists="false" ipc-concordant="H04L27/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using correlation techniques, e.g. for spread spectrum signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/233" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/233</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using non-coherent demodulation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2331" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2331</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the received signal is demodulated using one or more delayed versions of itself</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2332" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a non-coherent carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2334" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2334</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2335" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using temporal properties of the received signal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2337" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital techniques to measure the time between zero-crossings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2338" definition-exists="false" ipc-concordant="H04L27/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04L27/2338</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using sampling </text><reference><text><class-ref scheme="cpc">H04L27/2331</class-ref> - <class-ref scheme="cpc">H04L27/2335</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/24" definition-exists="false" ipc-concordant="H04L27/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Half-wave signalling systems</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/26" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems using multi-frequency codes </text><reference><text><class-ref scheme="cpc">H04L27/32</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/2601" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2601</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicarrier modulation systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2602" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Signal structure</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2602</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/26025</class-ref>, <class-ref scheme="cpc">H04L27/2603</class-ref>, and <class-ref scheme="cpc">H04L27/26035</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/26025" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26025</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking </text><reference><text>allocating sub-channels of the transmission path <class-ref scheme="cpc">H04L5/003</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26025</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2602</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2602</class-ref> and <class-ref scheme="cpc">H04L27/26025</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2603" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2603</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Signal structure ensuring backward compatibility with legacy system</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/2603</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2602</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2602</class-ref> and <class-ref scheme="cpc">H04L27/2603</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/26035" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26035</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences </text><reference><text>using different training sequence per antenna <class-ref scheme="cpc">H04B7/0684</class-ref>; code allocation <class-ref scheme="cpc">H04J13/16</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26035</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2602</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2602</class-ref> and <class-ref scheme="cpc">H04L27/26035</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2604" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiresolution systems </text><reference><text>by means of multiresolution subcarriers <class-ref scheme="cpc">H04L27/183</class-ref>, <class-ref scheme="cpc">H04L27/3488</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2605" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2605</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Symbol extensions, e.g. Zero Tail, Unique Word [UW]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2607" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cyclic extensions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2608" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="frozen"><classification-symbol>H04L27/2608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of payload</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2608</class-ref> is no longer used for the classification of documents as of <reclassification-date>2021-01-01</reclassification-date>.<br/>The content of this group is being reclassified into groups <class-ref scheme="cpc">H04L5/0044</class-ref> and <class-ref scheme="cpc">H04L5/0046</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2608</class-ref>, <class-ref scheme="cpc">H04L5/0044</class-ref> and <class-ref scheme="cpc">H04L5/0046</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/261" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/261</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Details of reference signals</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/261</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/262</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/262</class-ref> and <class-ref scheme="cpc">H04L27/261</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2611" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="frozen"><classification-symbol>H04L27/2611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distribution thereof</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2611</class-ref> is no longer used for the classification of documents as of <reclassification-date>2021-01-01</reclassification-date>.<br/>The content of this group is being reclassified into groups <class-ref scheme="cpc">H04L5/0048</class-ref>, <class-ref scheme="cpc">H04L5/005</class-ref>, and <class-ref scheme="cpc">H04L5/0051</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2613" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2613</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Structure of the reference signals</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/2613</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/262</class-ref>.<br/>Group <class-ref scheme="cpc">H04L27/2613</class-ref> is also impacted by reclassification into groups <class-ref scheme="cpc">H04L27/26132</class-ref>, <class-ref scheme="cpc">H04L27/26134</class-ref>, and <class-ref scheme="cpc">H04L27/26136</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26132" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26132</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using repetition</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26132</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L27/2613</class-ref> and <class-ref scheme="cpc">H04L27/262</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2613</class-ref>, <class-ref scheme="cpc">H04L27/262</class-ref>, and <class-ref scheme="cpc">H04L27/26132</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26134" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26134</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26134</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L27/2613</class-ref> and <class-ref scheme="cpc">H04L27/262</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2613</class-ref>, <class-ref scheme="cpc">H04L27/262</class-ref>, and <class-ref scheme="cpc">H04L27/26134</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26136" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26136</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pilot sequence conveying additional information</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26136</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L27/2613</class-ref> and <class-ref scheme="cpc">H04L27/262</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2613</class-ref>, <class-ref scheme="cpc">H04L27/262</class-ref>, and <class-ref scheme="cpc">H04L27/26136</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2614" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Peak power aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2615" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction thereof using coding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2617" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using block codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2618" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction thereof using auxiliary subcarriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/262" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction thereof by selection of pilot symbols</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/262</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/261</class-ref>, <class-ref scheme="cpc">H04L27/2613</class-ref>, <class-ref scheme="cpc">H04L27/26132</class-ref>, <class-ref scheme="cpc">H04L27/26134</class-ref>, and <class-ref scheme="cpc">H04L27/26136</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2621" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction thereof using phase offsets between subcarriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2623" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction thereof by clipping</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2624" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by soft clipping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2626" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2626</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements specific to the transmitter only</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2626</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L27/26265</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2626</class-ref> and <class-ref scheme="cpc">H04L27/26265</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/26265" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26265</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements for sidelobes suppression specially adapted to multicarrier systems, e.g. spectral precoding</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26265</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2626</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2626</class-ref> and <class-ref scheme="cpc">H04L27/26265</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2627" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modulators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2628" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2628</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators </text><reference><text><class-ref scheme="cpc">H04L27/2634</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2628</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/2634</class-ref>, <class-ref scheme="cpc">H04L27/2636</class-ref> and <class-ref scheme="cpc">H04L27/26362</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/263" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modification of IFFT/IDFT modulator for performance improvement</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/263</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/2634</class-ref>, <class-ref scheme="cpc">H04L27/2636</class-ref> and <class-ref scheme="cpc">H04L27/26362</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2631" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with polyphase implementation</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2631</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/2634</class-ref>, <class-ref scheme="cpc">H04L27/2636</class-ref> and <class-ref scheme="cpc">H04L27/26362</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2633" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using partial FFTs</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2633</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/2634</class-ref>, <class-ref scheme="cpc">H04L27/2636</class-ref> and <class-ref scheme="cpc">H04L27/26362</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2634" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2634</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/2634</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2628</class-ref>, <class-ref scheme="cpc">H04L27/263</class-ref>, <class-ref scheme="cpc">H04L27/2631</class-ref> and <class-ref scheme="cpc">H04L27/2633</class-ref>.<br/>Group <class-ref scheme="cpc">H04L27/2634</class-ref> is also impacted by reclassification into group <class-ref scheme="cpc">H04L27/26362</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2636" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2636</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/2636</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2628</class-ref>, <class-ref scheme="cpc">H04L27/263</class-ref>, <class-ref scheme="cpc">H04L27/2631</class-ref> and <class-ref scheme="cpc">H04L27/2633</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26362" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26362</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Subcarrier weighting equivalent to time domain filtering, e.g. weighting per subcarrier multiplication </text><reference><text>arrangements for removing intersymbol interference at the transmitter end <class-ref scheme="cpc">H04L25/03343</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26362</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L27/2628</class-ref>, <class-ref scheme="cpc">H04L27/263</class-ref>, <class-ref scheme="cpc">H04L27/2631</class-ref> and <class-ref scheme="cpc">H04L27/2633</class-ref>, and <class-ref scheme="cpc">H04L27/2634</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2637" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with direct modulation of individual subcarriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2639" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2639</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Modulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/264" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/264</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pulse-shaped multi-carrier, i.e. not using rectangular window</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/264</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/26412</class-ref>, <class-ref scheme="cpc">H04L27/26414</class-ref>, and <class-ref scheme="cpc">H04L27/26416</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26412" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26412</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering over the entire frequency band, e.g. filtered orthogonal frequency-division multiplexing [OFDM]</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26412</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/264</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/264</class-ref> and <class-ref scheme="cpc">H04L27/26412</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26414" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26414</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering per subband or per resource block, e.g. universal filtered multicarrier [UFMC] or generalized frequency division multiplexing [GFDM]</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26414</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/264</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/264</class-ref> and <class-ref scheme="cpc">H04L27/26414</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26416" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26416</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26416</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/264</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/264</class-ref> and <class-ref scheme="cpc">H04L27/26416</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2642" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2642</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Wavelet transform modulators </text><reference><text>wavelet-division <class-ref scheme="cpc">H04L5/0008</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2643" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using symbol repetition, e.g. time domain realization of distributed FDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2644" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with oversampling</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2646" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2646</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2647" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2647</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements specific to the receiver only </text><reference><text>equalisation <class-ref scheme="cpc">H04L27/01</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2649" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2649</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Demodulators</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2649</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/26524</class-ref>, <class-ref scheme="cpc">H04L27/26526</class-ref>, <class-ref scheme="cpc">H04L27/26532</class-ref>, <class-ref scheme="cpc">H04L27/26534</class-ref>, <class-ref scheme="cpc">H04L27/26536</class-ref>, <class-ref scheme="cpc">H04L27/26538</class-ref>, <class-ref scheme="cpc">H04L27/2654</class-ref>, <class-ref scheme="cpc">H04L27/26542</class-ref>, <class-ref scheme="cpc">H04L27/26544</class-ref>, and <class-ref scheme="cpc">H04L27/26546</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/265" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/265</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators </text><reference><text><class-ref scheme="cpc">H04L27/26524</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/265</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L27/2651</class-ref>, <class-ref scheme="cpc">H04L27/26522</class-ref>, <class-ref scheme="cpc">H04L27/26524</class-ref>, and <class-ref scheme="cpc">H04L27/26526</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2651" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2651</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Modification of fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators for performance improvement</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/2651</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/265</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/265</class-ref> and <class-ref scheme="cpc">H04L27/2651</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2652" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with polyphase implementation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26522" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26522</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using partial FFTs</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26522</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/265</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/265</class-ref> and <class-ref scheme="cpc">H04L27/26522</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26524" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26524</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L27/26524</class-ref> and <class-ref scheme="cpc">H04L27/26526</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref> and <class-ref scheme="cpc">H04L27/265</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26526" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26526</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2653" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with direct demodulation of individual subcarriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26532" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26532</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Demodulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26532</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2649</class-ref> and <class-ref scheme="cpc">H04L27/26532</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26534" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26534</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pulse-shaped multi-carrier, i.e. not using rectangular window</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L27/26534</class-ref> - <class-ref scheme="cpc">H04L27/2654</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26536" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26536</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering over the entire frequency band, e.g. filtered orthogonal frequency division multiplexing [OFDM]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/26538" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26538</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering per subband or per resource block, e.g. universal filtered multicarrier [UFMC] or generalized frequency division multiplexing [GFDM]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2654" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2654</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26542" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26542</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Wavelet transform demodulators  </text><reference><text>wavelet-division  <class-ref scheme="cpc">H04L5/0008</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26542</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2649</class-ref> and <class-ref scheme="cpc">H04L27/26542</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26544" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26544</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Demodulators for signals generated by symbol repetition </text><reference><text>synchronisation arrangements <class-ref scheme="cpc">H04L27/2655</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26544</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2649</class-ref> and <class-ref scheme="cpc">H04L27/26544</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/26546" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26546</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with oversampling</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26546</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2649</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2649</class-ref> and <class-ref scheme="cpc">H04L27/26546</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2655" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2656" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2656</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2657" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Carrier synchronisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2659" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2659</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coarse or integer frequency offset determination and synchronisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/266" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fine or fractional frequency offset determination and synchronisation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2662" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Symbol synchronisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2663" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coarse synchronisation, e.g. by correlation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2665" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2665</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fine synchronisation, e.g. by positioning the FFT window</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2666" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2668" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2669" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2669</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the domain of operation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2671" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time domain</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2672" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency domain</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2673" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by synchronisation parameters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2675" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2675</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pilot or known symbols</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2676" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blind, i.e. without using known symbols</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H04L27/2678" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using cyclostationarities, e.g. cyclic prefix or postfix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H04L27/2679" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2679</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Decision-aided</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2681" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by constraints</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L27/2681</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L27/26885</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2681</class-ref> and <class-ref scheme="cpc">H04L27/26885</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2682" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2682</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Precision</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2684" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complexity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2685" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Speed of convergence</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2686" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2686</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Range of frequencies or delays tested</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2688" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resistance to perturbation, e.g. noise, interference or fading</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/26885" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/26885</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Adaptation to rapid radio propagation changes, e.g. due to velocity</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L27/26885</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L27/2681</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L27/2681</class-ref> and <class-ref scheme="cpc">H04L27/26885</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/2689" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2689</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2691" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2691</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>involving interference determination or cancellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2692" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04L27/2694" definition-exists="false" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adaptive design</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/2695" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H04L27/2695</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with channel estimation, e.g. determination of delay spread, derivative or peak tracking </text><reference><text>channel estimation <class-ref scheme="cpc">H04L25/0202</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/2697" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2697</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with other modulation techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/2698" definition-exists="true" ipc-concordant="H04L27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/2698</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/28" definition-exists="false" ipc-concordant="H04L27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with simultaneous transmission of different frequencies each representing one code element</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/30" definition-exists="false" ipc-concordant="H04L27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein each code element is represented by a combination of frequencies</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L27/32" definition-exists="false" ipc-concordant="H04L27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carrier systems characterised by combinations of two or more of the types covered by groups <class-ref scheme="cpc">H04L27/02</class-ref>, <class-ref scheme="cpc">H04L27/10</class-ref>, <class-ref scheme="cpc">H04L27/18</class-ref> or <class-ref scheme="cpc">H04L27/26</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L27/34" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/3405" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3411" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3416" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3422" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the constellation is not the n - fold Cartesian product of a single underlying two-dimensional constellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3427" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/3433" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an underlying square constellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/3438" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an underlying generalised cross constellation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3444" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by applying a certain rotation to regular constellations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/345" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications of the signal space to allow the transmission of additional information</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3455" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in order to facilitate carrier recovery at the receiver end, e.g. by transmitting a pilot or by using additional signal points to allow the detection of rotations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3461" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in order to transmit a subchannel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3466" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by providing an alternative to one signal point</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3472" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by switching between alternative constellations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3477" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using the outer points of the constellation or of the constituent two-dimensional constellations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3483" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a modulation of the constellation points</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/3488" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiresolution systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/3494" definition-exists="false" ipc-concordant="H04L27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non - square modulating pulses, e.g. using raised cosine pulses; Partial response QAM, i.e. with partial response pulse shaping </text><reference><text>QAM over partial response channels <class-ref scheme="cpc">H04L25/497</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/36" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modulator circuits</text></title-part><title-part><text>Transmitter circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/361" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/362" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated </text><reference><text><class-ref scheme="cpc">H04L27/366</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/363" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non - square modulating pulses, modulators specifically designed for this </text><reference><text>transmission of non - square QAM <class-ref scheme="cpc">H04L27/3494</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/364" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/364</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/365" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/366" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/366</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/367" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/367</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using predistortion</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/368" definition-exists="false" ipc-concordant="H04L27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adaptive predistortion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L27/38" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Demodulator circuits</text></title-part><title-part><text>Receiver circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3809" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Amplitude regulation arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3818" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coherent demodulation, i.e. using one or more nominally phase synchronous carriers </text><reference><text><class-ref scheme="cpc">H04L27/227</class-ref> and <class-ref scheme="cpc">H04L27/389</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3827" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the carrier is recovered using only the demodulated baseband signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3836" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/3845" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non - coherent demodulation, i.e. not using a phase synchronous carrier</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3854" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a non - coherent carrier, including systems with baseband correction for phase or frequency offset</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/3863" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compensation for quadrature error in the received signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L27/3872" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compensation for phase rotation in the demodulated signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L27/3881" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/3881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sampling and digital processing, not including digital systems which imitate heterodyne or homodyne demodulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L27/389" definition-exists="false" ipc-concordant="H04L27/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L27/389</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with separate demodulation for the phase and amplitude components</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L41/00" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L41/34</class-ref>, <class-ref scheme="cpc">H04L41/342</class-ref>, <class-ref scheme="cpc">H04L41/344</class-ref> and <class-ref scheme="cpc">H04L41/40</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/02" definition-exists="true" ipc-concordant="H04L41/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Standardisation</text></title-part><title-part><text>Integration</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0213" definition-exists="true" ipc-concordant="H04L41/0213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0213</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Standardised network management protocols, e.g. simple network management protocol [SNMP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/022" definition-exists="true" ipc-concordant="H04L41/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/022</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multivendor or multi-standard integration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0226" definition-exists="true" ipc-concordant="H04L41/0226" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0226</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Mapping or translating multiple network management protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0233" definition-exists="true" ipc-concordant="H04L41/0233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0233</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Object-oriented techniques, for representation of network management data, e.g. common object request broker architecture [CORBA]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/024" definition-exists="true" ipc-concordant="H04L41/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/024</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>using relational databases for representation of network management data, e.g. managing via structured query language [SQL]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0246" definition-exists="true" ipc-concordant="H04L41/0246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0246</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Exchanging or transporting network management information using the Internet</text></title-part><title-part><text>Embedding network management web servers in network elements</text></title-part><title-part><text>Web-services-based protocols</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0253" definition-exists="true" ipc-concordant="H04L41/0253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0253</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using browsers or web-pages for accessing management information</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/026" definition-exists="true" ipc-concordant="H04L41/026" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/026</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using e-messaging for transporting management information, e.g. email, instant messaging or chat</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0266" definition-exists="true" ipc-concordant="H04L41/0266" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0266</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using meta-data, objects or commands for formatting management information, e.g. using eXtensible markup language [XML]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0273" definition-exists="true" ipc-concordant="H04L41/0273" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0273</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using web services for network management, e.g. simple object access protocol [SOAP]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/028" definition-exists="true" ipc-concordant="H04L41/0273" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/028</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for synchronisation between service call and response</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0286" definition-exists="true" ipc-concordant="H04L41/0273" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0286</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for search or classification or discovery of web services providing management functionalities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0293" definition-exists="true" ipc-concordant="H04L41/0273" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0293</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for accessing web services by means of a binding identification of the management service or element</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/04" definition-exists="true" ipc-concordant="H04L41/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/04</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network management architectures or arrangements</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/04</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L41/045</class-ref>, <class-ref scheme="cpc">H04L41/052</class-ref>, <class-ref scheme="cpc">H04L41/34</class-ref>, <class-ref scheme="cpc">H04L41/342</class-ref> and <class-ref scheme="cpc">H04L41/344</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/042" definition-exists="true" ipc-concordant="H04L41/042" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/042</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>comprising distributed management centres cooperatively managing the network</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/044" definition-exists="true" ipc-concordant="H04L41/044" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/044</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>comprising hierarchical management structures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/045" definition-exists="true" ipc-concordant="H04L41/045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/045</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>comprising client-server management architectures</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/045</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/04</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/04</class-ref> and <class-ref scheme="cpc">H04L41/045</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/046" definition-exists="true" ipc-concordant="H04L41/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/046</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>comprising network management agents or mobile agents therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/048" definition-exists="true" ipc-concordant="H04L41/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mobile agents</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/052" definition-exists="true" ipc-concordant="H04L41/052" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/052</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using standardised network management architectures, e.g. telecommunication management network [TMN] or unified network management architecture [UNMA]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/052</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/04</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/04</class-ref> and <class-ref scheme="cpc">H04L41/052</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/06" definition-exists="true" ipc-concordant="H04L41/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Management of faults, events, alarms or notifications</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0604" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0604</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using filtering, e.g. reduction of information by using priority, element types, position or time</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0609" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0609</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on severity or priority</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0613" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0613</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on the type or category of the network elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0618" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on the physical or logical position</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0622" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on time</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0627" definition-exists="true" ipc-concordant="H04L41/0604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by acting on the notification or alarm source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0631" definition-exists="true" ipc-concordant="H04L41/0631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0631</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using root cause analysis</text></title-part><title-part><text>using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0636" definition-exists="false" ipc-concordant="H04L41/0631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a decision tree analysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/064" definition-exists="false" ipc-concordant="H04L41/0631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving time analysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0645" definition-exists="true" ipc-concordant="H04L41/0631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by additionally acting on or stimulating the network after receiving notifications</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/065" definition-exists="false" ipc-concordant="H04L41/0631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving logical or physical relationship, e.g. grouping and hierarchies</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0654" definition-exists="true" ipc-concordant="H04L41/0654" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0654</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using network fault recovery </text><reference><text>ring fault isolation or reconfiguration in loop networks without recovery actions by a network management system <class-ref scheme="cpc">H04L12/437</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0659" definition-exists="true" ipc-concordant="H04L41/0659" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0659</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by isolating or reconfiguring faulty entities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0663" definition-exists="true" ipc-concordant="H04L41/0663" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0663</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Performing the actions predefined by failover planning, e.g. switching to standby network elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0668" definition-exists="true" ipc-concordant="H04L41/0668" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0668</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0672" definition-exists="true" ipc-concordant="H04L41/0654" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by re-configuring the faulty entity</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0677" definition-exists="true" ipc-concordant="H04L41/0677" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0677</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Localisation of faults</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0681" definition-exists="true" ipc-concordant="H04L41/0681" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0681</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Configuration of triggering conditions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0686" definition-exists="true" ipc-concordant="H04L41/0686" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0686</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Additional information in the notification, e.g. enhancement of specific meta-data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/069" definition-exists="true" ipc-concordant="H04L41/069" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/069</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using logs of notifications</text></title-part><title-part><text>Post-processing of notifications</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0695" definition-exists="true" ipc-concordant="H04L41/0695" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0695</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>the faulty arrangement being the maintenance, administration or management system</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/08" definition-exists="true" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Configuration management of networks or network elements </text><reference><text>address allocation <class-ref scheme="cpc">H04L61/50</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/08</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L41/0895</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/08</class-ref> and <class-ref scheme="cpc">H04L41/0895</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0803" definition-exists="true" ipc-concordant="H04L41/0803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0803</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Configuration setting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0806" definition-exists="true" ipc-concordant="H04L41/0806" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0806</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for initial configuration or provisioning, e.g. plug-and-play</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0809" definition-exists="true" ipc-concordant="H04L41/0806" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plug-and-play configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0813" definition-exists="false" ipc-concordant="H04L41/0813" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0813</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the conditions triggering a change of settings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0816" definition-exists="false" ipc-concordant="H04L41/0816" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0816</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>the condition being an adaptation, e.g. in response to network events</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/082" definition-exists="true" ipc-concordant="H04L41/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/082</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>the condition being updates or upgrades of network functionality</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0823" definition-exists="true" ipc-concordant="H04L41/0823" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0823</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability </text><reference><text>for optimising operational conditions of wireless networks <class-ref scheme="cpc">H04W24/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0826" definition-exists="true" ipc-concordant="H04L41/0826" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0826</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for reduction of network costs </text><reference><text><class-ref scheme="cpc">H04L41/0833</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/083" definition-exists="false" ipc-concordant="H04L41/083" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/083</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for increasing network speed</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0833" definition-exists="false" ipc-concordant="H04L41/0833" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0833</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for reduction of network energy consumption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0836" definition-exists="false" ipc-concordant="H04L41/0823" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to enhance reliability, e.g. reduce downtime</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/084" definition-exists="false" ipc-concordant="H04L41/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/084</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Configuration by using pre-existing information, e.g. using templates or copying from other elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0843" definition-exists="false" ipc-concordant="H04L41/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on generic templates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0846" definition-exists="false" ipc-concordant="H04L41/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on copy from other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/085" definition-exists="true" ipc-concordant="H04L41/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/085</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Retrieval of network configuration</text></title-part><title-part><text>Tracking network configuration history</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0853" definition-exists="false" ipc-concordant="H04L41/0853" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0853</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by actively collecting configuration information or by backing up configuration information</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0856" definition-exists="true" ipc-concordant="H04L41/0853" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0856</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>by backing up or archiving configuration information</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0859" definition-exists="false" ipc-concordant="H04L41/0859" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0859</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by keeping history of different configuration generations or by rolling back to previous configuration versions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/0863" definition-exists="true" ipc-concordant="H04L41/0859" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0863</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>by rolling back to previous configuration versions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0866" definition-exists="true" ipc-concordant="H04L41/0866" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0866</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Checking the configuration</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0869" definition-exists="false" ipc-concordant="H04L41/0869" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0869</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Validating the configuration within one network element</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0873" definition-exists="false" ipc-concordant="H04L41/0873" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0873</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Checking configuration conflicts between network elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0876" definition-exists="true" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aspects of the degree of configuration automation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0879" definition-exists="false" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0879</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manual configuration through operator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0883" definition-exists="false" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Semiautomatic configuration, e.g. proposals from system</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0886" definition-exists="false" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fully automatic configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0889" definition-exists="false" ipc-concordant="H04L41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/0889</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Techniques to speed-up the configuration process</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0893" definition-exists="true" ipc-concordant="H04L41/0893" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0893</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Assignment of logical groups to network elements</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/0893</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L41/0894</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/0893</class-ref> and <class-ref scheme="cpc">H04L41/0894</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0894" definition-exists="true" ipc-concordant="H04L41/0894" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0894</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Policy-based network configuration management</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/0894</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/0893</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/0893</class-ref> and <class-ref scheme="cpc">H04L41/0894</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0895" definition-exists="true" ipc-concordant="H04L41/0895" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0895</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Configuration of virtualised networks or elements, e.g. virtualised network function or OpenFlow elements</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/0895</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/08</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/08</class-ref> and <class-ref scheme="cpc">H04L41/0895</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/0896" definition-exists="true" ipc-concordant="H04L41/0896" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0896</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities </text><reference><text>flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, <class-ref scheme="cpc">H04L47/76</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/0896</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L41/0897</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/0896</class-ref> and <class-ref scheme="cpc">H04L41/0897</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/0897" definition-exists="true" ipc-concordant="H04L41/0897" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/0897</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by horizontal or vertical scaling of resources, or by migrating entities, e.g. virtual resources or entities</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/0897</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/0896</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/0896</class-ref> and <class-ref scheme="cpc">H04L41/0897</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/12" definition-exists="true" ipc-concordant="H04L41/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Discovery or management of network topologies</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/12</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L41/122</class-ref>, <class-ref scheme="cpc">H04L41/34</class-ref>, <class-ref scheme="cpc">H04L41/342</class-ref>, <class-ref scheme="cpc">H04L41/344</class-ref> and <class-ref scheme="cpc">H04L41/40</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/122" definition-exists="true" ipc-concordant="H04L41/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/122</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>of virtualised topologies, e.g. software-defined networks [SDN] or network function virtualisation [NFV]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/122</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L41/12</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/12</class-ref> and <class-ref scheme="cpc">H04L41/122</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/14" definition-exists="true" ipc-concordant="H04L41/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/14</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network analysis or design</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/14</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L41/149</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/14</class-ref> and <class-ref scheme="cpc">H04L41/149</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/142" definition-exists="true" ipc-concordant="H04L41/142" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/142</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using statistical or mathematical methods</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/145" definition-exists="true" ipc-concordant="H04L41/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving simulating, designing, planning or modelling of a network</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/147" definition-exists="true" ipc-concordant="H04L41/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/147</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for predicting network behaviour</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L41/147</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L41/149</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/147</class-ref> and <class-ref scheme="cpc">H04L41/149</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/149" definition-exists="true" ipc-concordant="H04L41/149" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/149</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for prediction of maintenance</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/149</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L41/14</class-ref> and <class-ref scheme="cpc">H04L41/147</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/14</class-ref>, <class-ref scheme="cpc">H04L41/147</class-ref> and <class-ref scheme="cpc">H04L41/149</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/16" definition-exists="true" ipc-concordant="H04L41/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/16</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using machine learning or artificial intelligence</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/18" definition-exists="true" ipc-concordant="H04L41/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/18</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Delegation of network management function, e.g. customer network management [CNM]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/20" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network management software packages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/22" definition-exists="true" ipc-concordant="H04L41/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/22</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>comprising specially adapted graphical user interfaces [GUI]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/24" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using dedicated network management hardware</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/26" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using dedicated tools for LAN [Local Area Network] management</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/28" definition-exists="true" ipc-concordant="H04L41/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/28</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Restricting access to network management systems or functions, e.g. using authorisation function to access network configuration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/30" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Decision processes by autonomous network management units using voting and bidding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/32" definition-exists="true" ipc-concordant="H04L41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Specific management aspects for broadband networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/34" definition-exists="true" ipc-concordant="H04L41/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/34</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Signalling channels for network management communication</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L41/34</class-ref>, <class-ref scheme="cpc">H04L41/342</class-ref> and <class-ref scheme="cpc">H04L41/344</class-ref> are incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L41/00</class-ref>, <class-ref scheme="cpc">H04L41/04</class-ref> and <class-ref scheme="cpc">H04L41/12</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/342" definition-exists="true" ipc-concordant="H04L41/342" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/342</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>between virtual entities, e.g. orchestrators, SDN or NFV entities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/344" definition-exists="true" ipc-concordant="H04L41/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/344</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Out-of-band transfers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/40" definition-exists="true" ipc-concordant="H04L41/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using virtualisation of network functions or resources, e.g. SDN or NFV entities</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L41/40</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L41/00</class-ref> and <class-ref scheme="cpc">H04L41/12</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L41/00</class-ref>, <class-ref scheme="cpc">H04L41/12</class-ref> and <class-ref scheme="cpc">H04L41/40</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L41/50" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H04L41/50</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Network service management, e.g. ensuring proper service fulfilment according to agreements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5003" definition-exists="true" ipc-concordant="H04L41/5003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5003</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Managing SLA</text></title-part><title-part><text>Interaction between SLA and QoS</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5006" definition-exists="true" ipc-concordant="H04L41/5006" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5006</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Creating or negotiating SLA contracts, guarantees or penalties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5009" definition-exists="true" ipc-concordant="H04L41/5009" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5009</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/5012" definition-exists="false" ipc-concordant="H04L41/5009" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>determining service availability, e.g. which services are available at a certain point in time</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L41/5016" definition-exists="false" ipc-concordant="H04L41/5009" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on statistics of service availability, e.g. in percentage or over a given time</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5019" definition-exists="true" ipc-concordant="H04L41/5019" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5019</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Ensuring fulfilment of SLA</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/5022" definition-exists="false" ipc-concordant="H04L41/5022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5022</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by giving priorities, e.g. assigning classes of service</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L41/5025" definition-exists="true" ipc-concordant="H04L41/5025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5025</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by proactively reacting to service quality change, e.g. by reconfiguration after service quality degradation or upgrade</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5029" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5029</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Service quality level-based billing, e.g. dependent on measured service level customer is charged more or less</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5032" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generating service level reports</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5041" definition-exists="false" ipc-concordant="H04L41/5041" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5041</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the time relationship between creation and deployment of a service</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5045" definition-exists="false" ipc-concordant="H04L41/5041" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Making service definitions prior to deployment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5048" definition-exists="false" ipc-concordant="H04L41/5041" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Automatic or semi-automatic definitions, e.g. definition templates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5051" definition-exists="false" ipc-concordant="H04L41/5051" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5051</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Service on demand, e.g. definition and deployment of services in real time</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5054" definition-exists="true" ipc-concordant="H04L41/5054" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5054</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5058" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5058</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Service discovery by the service manager</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5061" definition-exists="true" ipc-concordant="H04L41/5061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5061</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the interaction between service providers and their network customers, e.g. customer relationship management</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5064" definition-exists="true" ipc-concordant="H04L41/5061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5064</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Customer relationship management</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5067" definition-exists="true" ipc-concordant="H04L41/5067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5067</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Customer-centric QoS measurements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/507" definition-exists="true" ipc-concordant="H04L41/507" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/507</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Filtering out customers affected by service problems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5074" definition-exists="true" ipc-concordant="H04L41/5074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5074</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Handling of user complaints or trouble tickets</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/5077" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/5077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the managed service relates to simple transport services, i.e. providing only network infrastructure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L41/508" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L41/508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on type of value added network service under agreement</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5083" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5083</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>wherein the managed service relates to web hosting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5087" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5087</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>wherein the managed service relates to voice services </text><reference><text>management of VoIP services <class-ref scheme="cpc">H04M7/0081</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/509" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/509</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>wherein the managed service relates to media content delivery, e.g. audio, video or TV</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5093" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5093</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>wherein the managed service relates to messaging or chat services</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L41/5096" definition-exists="true" ipc-concordant="H04L41/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L41/5096</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>wherein the managed service relates to distributed or central networked applications</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L43/00" definition-exists="true" ipc-concordant="H04L43/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for monitoring or testing data switching networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/02" definition-exists="true" ipc-concordant="H04L43/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Capturing of monitoring data</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/022" definition-exists="true" ipc-concordant="H04L43/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/022</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by sampling</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/024" definition-exists="true" ipc-concordant="H04L43/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/024</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by adaptive sampling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/026" definition-exists="true" ipc-concordant="H04L43/026" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/026</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using flow identification</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/028" definition-exists="true" ipc-concordant="H04L43/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/028</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by filtering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/04" definition-exists="true" ipc-concordant="H04L43/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/04</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Processing captured monitoring data, e.g. for logfile generation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/045" definition-exists="true" ipc-concordant="H04L43/045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/045</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for graphical visualisation of monitoring data</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/06" definition-exists="true" ipc-concordant="H04L43/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Generation of reports</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/062" definition-exists="true" ipc-concordant="H04L43/062" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/062</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>related to network traffic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/065" definition-exists="true" ipc-concordant="H04L43/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/065</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>related to network devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/067" definition-exists="true" ipc-concordant="H04L43/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/067</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using time frame reporting</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/08" definition-exists="true" ipc-concordant="H04L43/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L43/08</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L43/20</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L43/08</class-ref> and <class-ref scheme="cpc">H04L43/20</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/0805" definition-exists="false" ipc-concordant="H04L43/0805" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0805</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by checking availability</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0811" definition-exists="true" ipc-concordant="H04L43/0811" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0811</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by checking connectivity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0817" definition-exists="true" ipc-concordant="H04L43/0817" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0817</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by checking functioning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/0823" definition-exists="true" ipc-concordant="H04L43/0823" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0823</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Errors, e.g. transmission errors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0829" definition-exists="true" ipc-concordant="H04L43/0829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0829</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Packet loss</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L43/0835" definition-exists="false" ipc-concordant="H04L43/0829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L43/0835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>One way packet loss</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L43/0841" definition-exists="false" ipc-concordant="H04L43/0829" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L43/0841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Round trip packet loss</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0847" definition-exists="true" ipc-concordant="H04L43/0823" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L43/0847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission error</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/0852" definition-exists="true" ipc-concordant="H04L43/0852" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0852</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Delays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0858" definition-exists="false" ipc-concordant="H04L43/0852" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L43/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>One way delays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0864" definition-exists="false" ipc-concordant="H04L43/0864" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0864</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Round trip delays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/087" definition-exists="false" ipc-concordant="H04L43/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/087</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Jitter</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/0876" definition-exists="true" ipc-concordant="H04L43/0876" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0876</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network utilisation, e.g. volume of load or congestion level</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0882" definition-exists="true" ipc-concordant="H04L43/0882" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0882</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Utilisation of link capacity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0888" definition-exists="true" ipc-concordant="H04L43/0888" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0888</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Throughput</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L43/0894" definition-exists="true" ipc-concordant="H04L43/0894" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/0894</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Packet rate</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/091" definition-exists="true" ipc-concordant="H04L43/091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/091</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Measuring contribution of individual network components to actual service level</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/10" definition-exists="true" ipc-concordant="H04L43/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Active monitoring, e.g. heartbeat, ping or trace-route</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/103" definition-exists="false" ipc-concordant="H04L43/103" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/103</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>with adaptive polling, i.e. dynamically adapting the polling rate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/106" definition-exists="true" ipc-concordant="H04L43/106" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/106</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using time related information in packets, e.g. by adding timestamps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/12" definition-exists="true" ipc-concordant="H04L43/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network monitoring probes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/14" definition-exists="true" ipc-concordant="H04L43/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L43/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using software, i.e. software packages </text><reference><text>network security related monitoring <class-ref scheme="cpc">H04L63/1408</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/16" definition-exists="true" ipc-concordant="H04L43/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/16</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Threshold monitoring</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/18" definition-exists="true" ipc-concordant="H04L43/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/18</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocol analysers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/20" definition-exists="true" ipc-concordant="H04L43/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/20</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>the monitoring system or the monitored elements being virtualised, abstracted or software-defined entities, e.g. SDN or NFV</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L43/20</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L43/08</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L43/08</class-ref> and <class-ref scheme="cpc">H04L43/20</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L43/50" definition-exists="true" ipc-concordant="H04L43/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Testing arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L43/55" definition-exists="true" ipc-concordant="H04L43/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L43/55</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Testing of service level quality, e.g. simulating service usage</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L45/00" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing or path finding of packets in data switching networks </text><reference><text>routing or path finding in wireless networks <class-ref scheme="cpc">H04W40/00</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L45/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L45/17</class-ref>, <class-ref scheme="cpc">H04L45/243</class-ref>, <class-ref scheme="cpc">H04L45/247</class-ref>, <class-ref scheme="cpc">H04L45/645</class-ref>, <class-ref scheme="cpc">H04L45/655</class-ref>, <class-ref scheme="cpc">H04L45/76</class-ref>, <class-ref scheme="cpc">H04L45/80</class-ref>, <class-ref scheme="cpc">H04L45/85</class-ref> and <class-ref scheme="cpc">H04L45/851</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/02" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Topology update or discovery</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L45/02</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L45/03</class-ref>, <class-ref scheme="cpc">H04L45/033</class-ref>, <class-ref scheme="cpc">H04L45/036</class-ref>, <class-ref scheme="cpc">H04L45/037</class-ref> and <class-ref scheme="cpc">H04L45/0377</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/021" definition-exists="true" ipc-concordant="H04L45/021" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/021</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Ensuring consistency of routing table updates, e.g. by using epoch numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/023" definition-exists="true" ipc-concordant="H04L45/023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/023</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Delayed use of routing table updates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/025" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Updating only a limited number of routers, e.g. fish-eye update</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/026" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of "hello" or keep-alive messages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/028" definition-exists="true" ipc-concordant="H04L45/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/028</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Dynamic adaptation of the update intervals, e.g. event-triggered updates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/03" definition-exists="true" ipc-concordant="H04L45/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/03</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by updating link state protocols</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/03</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/02</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/02</class-ref> and <class-ref scheme="cpc">H04L45/03</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/033" definition-exists="true" ipc-concordant="H04L45/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/033</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by updating distance vector protocols</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/033</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/02</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/02</class-ref> and <class-ref scheme="cpc">H04L45/033</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/036" definition-exists="true" ipc-concordant="H04L45/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/036</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Updating the topology between route computation elements, e.g. between OpenFlow controllers</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L45/036</class-ref>, <class-ref scheme="cpc">H04L45/037</class-ref> and <class-ref scheme="cpc">H04L45/0377</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/02</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/037" definition-exists="true" ipc-concordant="H04L45/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/037</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routes obligatorily traversing service-related nodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L45/0377" definition-exists="true" ipc-concordant="H04L45/0377" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/0377</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for service chaining</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/04" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interdomain routing, e.g. hierarchical routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/06" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deflection routing, e.g. hot-potato routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/08" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Learning-based routing, e.g. using neural networks or artificial intelligence</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/10" definition-exists="true" ipc-concordant="H04L45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Routing in connection-oriented networks, e.g. X.25 or ATM</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/12" definition-exists="true" ipc-concordant="H04L45/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Shortest path evaluation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/121" definition-exists="true" ipc-concordant="H04L45/121" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/121</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by minimising delays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/122" definition-exists="true" ipc-concordant="H04L45/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/122</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by minimising distances, e.g. by selecting a route with minimum of number of hops</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/123" definition-exists="true" ipc-concordant="H04L45/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Evaluation of link metrics </text><reference><text>techniques for monitoring network metrics <class-ref scheme="cpc">H04L43/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/124" definition-exists="true" ipc-concordant="H04L45/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of metrics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/125" definition-exists="true" ipc-concordant="H04L45/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/125</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on throughput or bandwidth</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/126" definition-exists="true" ipc-concordant="H04L45/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/126</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>minimising geographical or physical path length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/127" definition-exists="true" ipc-concordant="H04L45/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on intermediate node capabilities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/128" definition-exists="true" ipc-concordant="H04L45/128" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/128</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for finding disjoint paths</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/1283" definition-exists="true" ipc-concordant="H04L45/128" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/1283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with disjoint links</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/1287" definition-exists="true" ipc-concordant="H04L45/128" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/1287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with disjoint nodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/14" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing performance; Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/16" definition-exists="true" ipc-concordant="H04L45/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/16</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multipoint routing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/17" definition-exists="true" ipc-concordant="H04L45/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/17</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Shortcut routing, e.g. using next hop resolution protocol [NHRP]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/17</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/00</class-ref> and <class-ref scheme="cpc">H04L45/17</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/18" definition-exists="true" ipc-concordant="H04L45/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/18</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Loop-free operations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/20" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hop count for routing purposes, e.g. TTL</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/22" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Alternate routing</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L45/22</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L45/247</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/22</class-ref> and <class-ref scheme="cpc">H04L45/247</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/24" definition-exists="true" ipc-concordant="H04L45/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/24</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multipath</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/243" definition-exists="true" ipc-concordant="H04L45/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/243</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using M+N parallel active paths</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/243</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/00</class-ref> and <class-ref scheme="cpc">H04L45/243</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/245" definition-exists="true" ipc-concordant="H04L45/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Link aggregation, e.g. trunking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/247" definition-exists="true" ipc-concordant="H04L45/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/247</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using M:N active or standby paths</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/247</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L45/00</class-ref> and <class-ref scheme="cpc">H04L45/22</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/00</class-ref>, <class-ref scheme="cpc">H04L45/22</class-ref> and <class-ref scheme="cpc">H04L45/247</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/26" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Route discovery packet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/28" definition-exists="true" ipc-concordant="H04L45/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/28</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using route fault recovery</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/30" definition-exists="true" ipc-concordant="H04L45/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing of multiclass traffic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/302" definition-exists="true" ipc-concordant="H04L45/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/302</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Route determination based on requested QoS</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/304" definition-exists="true" ipc-concordant="H04L45/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/304</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Route determination for signalling traffic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/306" definition-exists="true" ipc-concordant="H04L45/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/306</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Route determination based on the nature of the carried application</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/3065" definition-exists="true" ipc-concordant="H04L45/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/3065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for real time traffic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/308" definition-exists="true" ipc-concordant="H04L45/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Route determination based on user's profile, e.g. premium users</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/32" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flooding </text><reference><text>denial of service attacks <class-ref scheme="cpc">H04L63/1458</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/34" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Source routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/36" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Backward learning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/38" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flow based routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/40" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wormhole routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/42" definition-exists="true" ipc-concordant="H04L45/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/42</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Centralised routing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/44" definition-exists="true" ipc-concordant="H04L45/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/44</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Distributed routing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/46" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cluster building</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/48" definition-exists="true" ipc-concordant="H04L45/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/48</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing tree calculation</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L45/48</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L45/484</class-ref> and <class-ref scheme="cpc">H04L45/488</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/48</class-ref>, <class-ref scheme="cpc">H04L45/484</class-ref> and <class-ref scheme="cpc">H04L45/488</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/484" definition-exists="true" ipc-concordant="H04L45/484" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/484</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using multiple routing trees</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/484</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/48</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/48</class-ref> and <class-ref scheme="cpc">H04L45/484</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/488" definition-exists="true" ipc-concordant="H04L45/488" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/488</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using root node determination</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/488</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/48</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/48</class-ref> and <class-ref scheme="cpc">H04L45/488</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/50" definition-exists="true" ipc-concordant="H04L45/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using label swapping, e.g. multi-protocol label switch [MPLS]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/502" definition-exists="true" ipc-concordant="H04L45/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frame based</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/505" definition-exists="true" ipc-concordant="H04L45/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell based</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/507" definition-exists="true" ipc-concordant="H04L45/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Label distribution</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/52" definition-exists="true" ipc-concordant="H04L45/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/52</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multiprotocol routers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/54" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Organization of routing tables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/56" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing software</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/563" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/563</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Software download or update</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/566" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing instructions carried by the data packet, e.g. active networks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/58" definition-exists="true" ipc-concordant="H04L45/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/58</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Association of routers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/583" definition-exists="true" ipc-concordant="H04L45/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stackable routers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/586" definition-exists="true" ipc-concordant="H04L45/586" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/586</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>of virtual routers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/60" definition-exists="true" ipc-concordant="H04L45/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Router architectures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/62" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength based </text><reference><text>optical switching <class-ref scheme="cpc">H04Q11/0062</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/64" definition-exists="true" ipc-concordant="H04L45/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/64</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using an overlay routing layer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/645" definition-exists="true" ipc-concordant="H04L45/645" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/645</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Splitting route computation layer and forwarding layer, e.g. routing according to path computational element [PCE] or based on OpenFlow functionality</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L45/645</class-ref> and <class-ref scheme="cpc">H04L45/655</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/00</class-ref>, <class-ref scheme="cpc">H04L45/645</class-ref> and <class-ref scheme="cpc">H04L45/655</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/655" definition-exists="true" ipc-concordant="H04L45/655" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/655</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Interaction between route computation entities and forwarding entities, e.g. for route determination or for flow table update</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/66" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Layer 2 routing, e.g. in Ethernet based MAN's</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/68" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pseudowire emulation, e.g. IETF WG PWE3</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/70" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/70</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Routing based on monitoring results</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/72" definition-exists="true" ipc-concordant="H04L45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L45/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing based on the source address</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/74" definition-exists="true" ipc-concordant="H04L45/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/74</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address processing for routing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/741" definition-exists="true" ipc-concordant="H04L45/741" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/741</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/742" definition-exists="true" ipc-concordant="H04L45/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/742</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Route cache; Operation thereof</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/745" definition-exists="true" ipc-concordant="H04L45/745" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/745</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address table lookup</text></title-part><title-part><text>Address filtering</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L45/745</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L45/7452</class-ref> and <class-ref scheme="cpc">H04L45/7459</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/745</class-ref>, <class-ref scheme="cpc">H04L45/7452</class-ref> and <class-ref scheme="cpc">H04L45/7459</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/7452" definition-exists="true" ipc-concordant="H04L45/7452" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/7452</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multiple parallel or consecutive lookup operations </text><reference><text>lookup operation involving Bloom filters <class-ref scheme="cpc">H04L45/7459</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/7452</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/745</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/745</class-ref> and <class-ref scheme="cpc">H04L45/7452</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/7453" definition-exists="true" ipc-concordant="H04L45/7453" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/7453</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using hashing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L45/7459" definition-exists="true" ipc-concordant="H04L45/7459" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/7459</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using Bloom filters</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/7459</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/745</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/745</class-ref> and <class-ref scheme="cpc">H04L45/7459</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/74591" definition-exists="true" ipc-concordant="H04L45/745" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/74591</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>using content-addressable memories [CAM]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/748" definition-exists="true" ipc-concordant="H04L45/748" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/748</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using longest matching prefix</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/76" definition-exists="true" ipc-concordant="H04L45/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/76</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing in software-defined topologies, e.g. routing between virtual machines</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L45/76</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L45/00</class-ref> and <class-ref scheme="cpc">H04L45/76</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L45/80" definition-exists="true" ipc-concordant="H04L45/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/80</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Ingress point selection by the source endpoint, e.g. selection of ISP or POP</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L45/80</class-ref>, <class-ref scheme="cpc">H04L45/85</class-ref> and <class-ref scheme="cpc">H04L45/851</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L45/00</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L45/85" definition-exists="true" ipc-concordant="H04L45/85" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/85</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Selection among different networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L45/851" definition-exists="true" ipc-concordant="H04L45/851" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L45/851</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Dynamic network selection or re-selection, e.g. after degradation of quality</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L47/00" definition-exists="true" ipc-concordant="H04L47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Traffic control in data switching networks </text><reference><text>arrangements for detecting or correcting errors in the information received <class-ref scheme="cpc">H04L1/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u>:<subnote type="number"><note-paragraph>Flow control or congestion control </note-paragraph><note-paragraph>Queue scheduling </note-paragraph><note-paragraph>Admission control or resource allocation </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L47/10" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Flow control</text></title-part><title-part><text>Congestion control</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L47/10</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L47/43</class-ref> and <class-ref scheme="cpc">H04L47/431</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/10</class-ref>, <class-ref scheme="cpc">H04L47/43</class-ref> and <class-ref scheme="cpc">H04L47/431</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/11" definition-exists="true" ipc-concordant="H04L47/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/11</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Identifying congestion</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/115" definition-exists="true" ipc-concordant="H04L47/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a dedicated packet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/12" definition-exists="true" ipc-concordant="H04L47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Avoiding congestion</text></title-part><title-part><text>Recovering from congestion</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L47/12</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L47/129</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/12</class-ref> and <class-ref scheme="cpc">H04L47/129</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/122" definition-exists="true" ipc-concordant="H04L47/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/122</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by diverting traffic away from congested entities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/125" definition-exists="true" ipc-concordant="H04L47/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/125</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by balancing the load, e.g. traffic engineering</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/127" definition-exists="true" ipc-concordant="H04L47/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/127</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by using congestion prediction</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/129" definition-exists="true" ipc-concordant="H04L47/129" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/129</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>at the destination endpoint, e.g. reservation of terminal resources or buffer space</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L47/129</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L47/12</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/12</class-ref> and <class-ref scheme="cpc">H04L47/129</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/13" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a LAN segment, e.g. ring or bus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/135" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by jamming the transmission media</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/15" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in relation to multipoint traffic </text><reference><text>arrangements for broadcast or multicast in data networks <class-ref scheme="cpc">H04L12/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/16" definition-exists="false" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in connection oriented networks, e.g. frame relay</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/17" definition-exists="true" ipc-concordant="H04L47/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/17</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Interaction among intermediate nodes, e.g. hop by hop</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/18" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>End to end</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/19" definition-exists="true" ipc-concordant="H04L47/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/19</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>at layers above the network layer </text><reference><text>network arrangements for networked applications for scheduling or organising the servicing of application requests <class-ref scheme="cpc">H04L67/60</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/193" definition-exists="true" ipc-concordant="H04L47/193" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/193</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>at the transport layer, e.g. TCP related</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/196" definition-exists="true" ipc-concordant="H04L47/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/196</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration of transport layer protocols, e.g. TCP and UDP</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/20" definition-exists="true" ipc-concordant="H04L47/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/20</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Traffic policing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/21" definition-exists="true" ipc-concordant="H04L47/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/21</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using leaky-bucket</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/215" definition-exists="true" ipc-concordant="H04L47/215" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/215</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using token-bucket</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/22" definition-exists="true" ipc-concordant="H04L47/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/22</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Traffic shaping</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/225" definition-exists="true" ipc-concordant="H04L47/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Determination of shaping rate, e.g. using a moving window</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/23" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit dropping</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/24" definition-exists="true" ipc-concordant="H04L47/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/24</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Traffic characterised by specific attributes, e.g. priority or QoS</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2408" definition-exists="true" ipc-concordant="H04L47/2408" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2408</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting different services, e.g. a differentiated services [DiffServ] type of service</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2416" definition-exists="true" ipc-concordant="H04L47/2416" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2416</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Real-time traffic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2425" definition-exists="true" ipc-concordant="H04L47/2425" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2425</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting services specification, e.g. SLA</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/2433" definition-exists="true" ipc-concordant="H04L47/2425" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/2433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of priorities to traffic types</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2441" definition-exists="true" ipc-concordant="H04L47/2441" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2441</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>relying on flow classification, e.g. using integrated services [IntServ]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/245" definition-exists="true" ipc-concordant="H04L47/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using preemption</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2458" definition-exists="true" ipc-concordant="H04L47/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/2458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modification of priorities while in transit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2466" definition-exists="true" ipc-concordant="H04L47/2466" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2466</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using signalling traffic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2475" definition-exists="true" ipc-concordant="H04L47/2475" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2475</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting traffic characterised by the type of applications</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2483" definition-exists="true" ipc-concordant="H04L47/2483" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2483</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>involving identification of individual flows</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/2491" definition-exists="true" ipc-concordant="H04L47/2491" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/2491</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Mapping quality of service [QoS] requirements between different networks</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/25" definition-exists="true" ipc-concordant="H04L47/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/25</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>with rate being modified by the source upon detecting a change of network conditions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/26" definition-exists="true" ipc-concordant="H04L47/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/26</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using explicit feedback to the source, e.g. choke packets</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L47/26</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L47/265</class-ref> and <class-ref scheme="cpc">H04L47/267</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/26</class-ref>, <class-ref scheme="cpc">H04L47/265</class-ref> and <class-ref scheme="cpc">H04L47/267</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/263" definition-exists="true" ipc-concordant="H04L47/263" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/263</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Rate modification at the source after receiving feedback</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/265" definition-exists="true" ipc-concordant="H04L47/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/265</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>sent by intermediate network nodes</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L47/265</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L47/26</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/26</class-ref> and <class-ref scheme="cpc">H04L47/265</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/266" definition-exists="true" ipc-concordant="H04L47/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stopping or restarting the source, e.g. X-on or X-off</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/267" definition-exists="true" ipc-concordant="H04L47/267" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/267</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>sent by the destination endpoint </text><reference><text>network streaming of media packets with control of the source by the destination <class-ref scheme="cpc">H04L65/613</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L47/267</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L47/26</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/26</class-ref> and <class-ref scheme="cpc">H04L47/267</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/27" definition-exists="true" ipc-concordant="H04L47/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/27</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/28" definition-exists="true" ipc-concordant="H04L47/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/28</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in relation to timing considerations</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/283" definition-exists="true" ipc-concordant="H04L47/283" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/283</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in response to processing delays, e.g. caused by jitter or round trip time [RTT]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/286" definition-exists="true" ipc-concordant="H04L47/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time to live</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/29" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/29</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>using a combination of thresholds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/30" definition-exists="true" ipc-concordant="H04L47/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in combination with information about buffer occupancy at either end or at transit nodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/31" definition-exists="true" ipc-concordant="H04L47/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/31</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by tagging of packets, e.g. using discard eligibility [DE] bits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/32" definition-exists="true" ipc-concordant="H04L47/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/32</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by discarding or delaying data units, e.g. packets or frames</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/323" definition-exists="true" ipc-concordant="H04L47/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Discarding or blocking control packets, e.g. ACK packets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/326" definition-exists="true" ipc-concordant="H04L47/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/326</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>with random discard, e.g. random early discard [RED]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/33" definition-exists="true" ipc-concordant="H04L47/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/33</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using forward notification</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/34" definition-exists="true" ipc-concordant="H04L47/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/34</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>ensuring sequence integrity, e.g. using sequence numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/35" definition-exists="true" ipc-concordant="H04L47/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/35</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by embedding flow control information in regular packets, e.g. piggybacking</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/36" definition-exists="true" ipc-concordant="H04L47/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/36</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by determining packet size, e.g. maximum transfer unit [MTU]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/365" definition-exists="true" ipc-concordant="H04L47/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dynamic adaptation of the packet size</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/37" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Slow start</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/38" definition-exists="true" ipc-concordant="H04L47/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/38</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by adapting coding or compression rate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/39" definition-exists="true" ipc-concordant="H04L47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Credit based</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/40" definition-exists="true" ipc-concordant="H04L47/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using split connections</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/41" definition-exists="true" ipc-concordant="H04L47/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/41</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by acting on aggregated flows or links</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/43" definition-exists="true" ipc-concordant="H04L47/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/43</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Assembling or disassembling of packets, e.g. segmentation and reassembly [SAR]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L47/43</class-ref> and <class-ref scheme="cpc">H04L47/431</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L47/10</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/10</class-ref>, <class-ref scheme="cpc">H04L47/43</class-ref> and <class-ref scheme="cpc">H04L47/431</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/431" definition-exists="true" ipc-concordant="H04L47/431" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/431</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using padding or de-padding</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L47/50" definition-exists="true" ipc-concordant="H04L47/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Queue scheduling</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/52" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/52</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by attributing bandwidth to queues</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/521" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Static queue service slot or fixed bandwidth allocation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/522" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dynamic queue service slot or variable bandwidth allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/524" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/524</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Queue skipping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/525" definition-exists="true" ipc-concordant="H04L47/525" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/525</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by redistribution of residual bandwidth</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/527" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/527</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quantum based scheduling, e.g. credit or deficit based scheduling or token bank</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/528" definition-exists="true" ipc-concordant="H04L47/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Minimum bandwidth guarantee</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/54" definition-exists="true" ipc-concordant="H04L47/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Loss aware scheduling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/56" definition-exists="true" ipc-concordant="H04L47/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/56</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>implementing delay-aware scheduling</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/562" definition-exists="true" ipc-concordant="H04L47/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/562</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Attaching a time tag to queues</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/564" definition-exists="true" ipc-concordant="H04L47/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Attaching a deadline to packets, e.g. earliest due date first</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/566" definition-exists="true" ipc-concordant="H04L47/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deadline varies as a function of time spent in the queue</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/568" definition-exists="true" ipc-concordant="H04L47/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calendar queues or timing rings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/58" definition-exists="true" ipc-concordant="H04L47/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Changing or combining different scheduling modes, e.g. multimode scheduling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/60" definition-exists="true" ipc-concordant="H04L47/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>implementing hierarchical scheduling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/62" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/62</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by scheduling criteria</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/6205" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for avoiding head of line blocking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/621" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Individual queue per connection or flow, e.g. per VC</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/6215" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Individual queue per QOS, rate or priority</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/622" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Queue service order</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/6225" definition-exists="false" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/6225</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Fixed service order, e.g. Round Robin</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/623" definition-exists="false" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/623</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Weighted service order</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/6235" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/6235</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Variable service order</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/624" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Altering the ordering of packets in an individual queue</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/6245" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to standard FIFO or LIFO</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/625" definition-exists="true" ipc-concordant="H04L47/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/625</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for service slots or service orders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/6255" definition-exists="true" ipc-concordant="H04L47/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>queue load conditions, e.g. longest queue first</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/626" definition-exists="true" ipc-concordant="H04L47/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>channel conditions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/6265" definition-exists="true" ipc-concordant="H04L47/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>past bandwidth allocation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/627" definition-exists="true" ipc-concordant="H04L47/625" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>policing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/6275" definition-exists="true" ipc-concordant="H04L47/6275" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/6275</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on priority</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/628" definition-exists="true" ipc-concordant="H04L47/628" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/628</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on packet size, e.g. shortest packet first</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/6285" definition-exists="true" ipc-concordant="H04L47/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/6285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provisions for avoiding starvation of low priority queues</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/629" definition-exists="true" ipc-concordant="H04L47/629" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/629</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Ensuring fair share of resources, e.g. weighted fair queuing [WFQ]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/6295" definition-exists="true" ipc-concordant="H04L47/6295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/6295</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using multiple queues, one for each individual QoS, connection, flow or priority</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L47/70" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/70</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Admission control</text></title-part><title-part><text>Resource allocation</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L47/70</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L47/83</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/70</class-ref> and <class-ref scheme="cpc">H04L47/83</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/72" definition-exists="true" ipc-concordant="H04L47/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/72</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using reservation actions during connection setup</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/722" definition-exists="true" ipc-concordant="H04L47/722" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/722</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>at the destination endpoint, e.g. reservation of terminal resources or buffer space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/724" definition-exists="true" ipc-concordant="H04L47/724" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/724</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>at intermediate nodes, e.g. resource reservation protocol [RSVP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/726" definition-exists="true" ipc-concordant="H04L47/726" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/726</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Reserving resources in multiple paths to be used simultaneously </text><reference><text>by balancing the load <class-ref scheme="cpc">H04L47/125</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/728" definition-exists="true" ipc-concordant="H04L47/726" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/728</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for backup paths</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/74" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/74</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>measures in reaction to resource unavailability</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/741" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/741</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Holding a request until resources become available</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/743" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/743</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reaction at the end points</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/745" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/745</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reaction in network</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/746" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/746</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reaction triggered by a failure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/748" definition-exists="true" ipc-concordant="H04L47/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/748</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Negotiation of resources, e.g. modification of a request</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/76" definition-exists="true" ipc-concordant="H04L47/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/76</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/762" definition-exists="true" ipc-concordant="H04L47/762" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/762</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>triggered by the network</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/765" definition-exists="true" ipc-concordant="H04L47/765" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/765</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>triggered by the end-points</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/767" definition-exists="true" ipc-concordant="H04L47/765" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/767</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>after changing the attachment point, e.g. after hand-off</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/78" definition-exists="true" ipc-concordant="H04L47/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/78</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Architectures of resource allocation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/781" definition-exists="true" ipc-concordant="H04L47/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/781</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Centralised allocation of resources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/782" definition-exists="true" ipc-concordant="H04L47/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/782</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Hierarchical allocation of resources, e.g. involving a hierarchy of local and centralised entities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/783" definition-exists="true" ipc-concordant="H04L47/783" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/783</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Distributed allocation of resources, e.g. bandwidth brokers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/785" definition-exists="true" ipc-concordant="H04L47/785" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/785</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>among multiple network domains, e.g. multilateral agreements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L47/786" definition-exists="true" ipc-concordant="H04L47/785" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/786</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mapping reservation between domains</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L47/787" definition-exists="true" ipc-concordant="H04L47/783" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/787</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bandwidth trade among domains</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/788" definition-exists="true" ipc-concordant="H04L47/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/788</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Autonomous allocation of resources</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/80" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/80</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Actions related to the user profile or the type of traffic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/801" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/801</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Real time traffic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/803" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Application aware</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/805" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>QOS or priority aware</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/806" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Broadcast or multicast traffic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/808" definition-exists="true" ipc-concordant="H04L47/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>User-type aware</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/82" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Miscellaneous aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/821" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prioritising resource allocation or reservation requests</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/822" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Collecting or measuring resource availability data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/823" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prediction of resource usage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/824" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applicable to portable or mobile terminals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/825" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Involving tunnels, e.g. MPLS</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/826" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Involving periods of time</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/827" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aggregation of resource allocation or reservation requests</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/828" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of resources per group of connections, e.g. per group of users</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L47/829" definition-exists="true" ipc-concordant="H04L47/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L47/829</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Topology based</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L47/83" definition-exists="true" ipc-concordant="H04L47/83" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L47/83</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on usage prediction</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L47/83</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L47/70</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L47/70</class-ref> and <class-ref scheme="cpc">H04L47/83</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L49/00" definition-exists="true" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Packet switching elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/10" definition-exists="true" ipc-concordant="H04L49/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the switching fabric construction</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L49/10</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L49/111</class-ref>, <class-ref scheme="cpc">H04L49/112</class-ref>, <class-ref scheme="cpc">H04L49/113</class-ref>, <class-ref scheme="cpc">H04L49/115</class-ref>, <class-ref scheme="cpc">H04L49/116</class-ref> and <class-ref scheme="cpc">H04L49/118</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/101" definition-exists="false" ipc-concordant="H04L49/101" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/101</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using crossbar or matrix</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/102" definition-exists="false" ipc-concordant="H04L49/102" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/102</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using shared medium, e.g. bus or ring</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/103" definition-exists="false" ipc-concordant="H04L49/103" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/103</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using a shared central buffer</text></title-part><title-part><text>using a shared memory</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/104" definition-exists="false" ipc-concordant="H04L49/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/104</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Asynchronous transfer mode [ATM] switching fabrics</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/105" definition-exists="false" ipc-concordant="H04L49/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM switching elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/106" definition-exists="false" ipc-concordant="H04L49/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using space switching, e.g. crossbar or matrix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/107" definition-exists="false" ipc-concordant="H04L49/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using shared medium</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/108" definition-exists="false" ipc-concordant="H04L49/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using shared central buffer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/109" definition-exists="false" ipc-concordant="H04L49/109" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/109</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Integrated on microchip, e.g. switch-on-chip</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/111" definition-exists="false" ipc-concordant="H04L49/111" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/111</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Switch interfaces, e.g. port details</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L49/111</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L49/10</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L49/10</class-ref> and <class-ref scheme="cpc">H04L49/111</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/112" definition-exists="false" ipc-concordant="H04L49/112" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/112</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Switch control, e.g. arbitration</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L49/112</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L49/10</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L49/10</class-ref> and <class-ref scheme="cpc">H04L49/112</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/113" definition-exists="false" ipc-concordant="H04L49/113" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/113</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for redundant switching, e.g. using parallel planes</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L49/113</class-ref>, <class-ref scheme="cpc">H04L49/115</class-ref>, <class-ref scheme="cpc">H04L49/116</class-ref> and <class-ref scheme="cpc">H04L49/118</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L49/10</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/115" definition-exists="false" ipc-concordant="H04L49/115" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/115</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Transferring a complete packet or cell through each plane</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/116" definition-exists="false" ipc-concordant="H04L49/116" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/116</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Transferring a part of the packet through each plane, e.g. by bit-slicing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/118" definition-exists="false" ipc-concordant="H04L49/118" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/118</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address processing within a device, e.g. using internal ID or tags for routing within a switch</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/15" definition-exists="true" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/15</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Interconnection of switching modules</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/1507" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distribute and route fabrics, e.g. sorting-routing or Batcher-Banyan</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/1515" definition-exists="false" ipc-concordant="H04L49/1515" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/1515</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Non-blocking multistage, e.g. Clos</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1523" definition-exists="false" ipc-concordant="H04L49/1515" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel switch fabric planes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/153" definition-exists="false" ipc-concordant="H04L49/1515" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/153</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>ATM switching fabrics having parallel switch planes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/1538" definition-exists="false" ipc-concordant="H04L49/1515" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/1538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell slicing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1546" definition-exists="false" ipc-concordant="H04L49/1546" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/1546</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using pipelined operation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/1553" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1553</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interconnection of ATM switching modules, e.g. ATM switching fabrics</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1561" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1561</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distribute and route fabrics, e.g. Batcher-Banyan</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1569" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1569</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clos switching fabrics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1576" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Crossbar or matrix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1584" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Full Mesh, e.g. knockout</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/1592" definition-exists="false" ipc-concordant="H04L49/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/1592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Perfect Shuffle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/20" definition-exists="true" ipc-concordant="H04L49/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/20</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Support for services</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/201" definition-exists="false" ipc-concordant="H04L49/201" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/201</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multicast operation</text></title-part><title-part><text>Broadcast operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/203" definition-exists="false" ipc-concordant="H04L49/201" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM switching fabrics with multicast or broadcast capabilities</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/205" definition-exists="false" ipc-concordant="H04L49/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quality of Service based</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/206" definition-exists="false" ipc-concordant="H04L49/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Real Time traffic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/208" definition-exists="false" ipc-concordant="H04L49/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Port mirroring</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/25" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/25</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing or path finding in a switch fabric</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/251" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cut-through or wormhole routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/252" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Store and forward routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/253" definition-exists="false" ipc-concordant="H04L49/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/253</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using establishment or release of connections between ports</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/254" definition-exists="false" ipc-concordant="H04L49/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/254</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Centralised controller, i.e. arbitration or scheduling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/255" definition-exists="false" ipc-concordant="H04L49/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control mechanisms for ATM switching fabrics</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/256" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Routing or path finding in ATM switching fabrics</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/257" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cut-through or wormhole routing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/258" definition-exists="false" ipc-concordant="H04L49/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grouping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/30" definition-exists="true" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Peripheral units, e.g. input or output ports</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3009" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Header conversion, routing tables or routing tags</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3018" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Input queuing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3027" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Output queuing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3036" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shared queuing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3045" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual queuing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3054" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auto-negotiation, e.g. access control between switch gigabit interface connector [GBIC] and link</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3063" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pipelined operation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3072" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Packet splitting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/3081" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/3081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM peripheral units, e.g. policing, insertion or extraction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/309" definition-exists="false" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/309</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Header conversion, routing tables or routing tags</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/35" definition-exists="true" ipc-concordant="H04L49/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/35</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Switches specially adapted for specific applications</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/351" definition-exists="false" ipc-concordant="H04L49/351" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/351</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for local area network [LAN], e.g. Ethernet switches</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/352" definition-exists="false" ipc-concordant="H04L49/351" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gigabit ethernet switching [GBPS]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/353" definition-exists="false" ipc-concordant="H04L49/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/353</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Support for fire wire switches, i.e. according to IEEE 1394</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/354" definition-exists="false" ipc-concordant="H04L49/354" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/354</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting virtual local area networks [VLAN]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/355" definition-exists="false" ipc-concordant="H04L49/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/355</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Application aware switches, e.g. for HTTP</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/356" definition-exists="false" ipc-concordant="H04L49/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/356</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for storage area networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/357" definition-exists="false" ipc-concordant="H04L49/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/357</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre channel switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/358" definition-exists="false" ipc-concordant="H04L49/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/358</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Infiniband Switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/40" definition-exists="true" ipc-concordant="H04L49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Constructional details, e.g. power supply, mechanical construction or backplane</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/405" definition-exists="false" ipc-concordant="H04L49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical details, e.g. power supply, mechanical construction or backplane of ATM switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/45" definition-exists="true" ipc-concordant="H04L49/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/45</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for providing or supporting expansion</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/455" definition-exists="false" ipc-concordant="H04L49/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Provisions for supporting expansion in ATM switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/50" definition-exists="true" ipc-concordant="H04L49/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Overload detection or protection within a single switching element</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/501" definition-exists="false" ipc-concordant="H04L49/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/501</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Overload detection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/503" definition-exists="false" ipc-concordant="H04L49/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Policing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/505" definition-exists="false" ipc-concordant="H04L49/505" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/505</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Corrective measures</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/506" definition-exists="false" ipc-concordant="H04L49/506" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/506</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Backpressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/508" definition-exists="false" ipc-concordant="H04L49/505" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Head of Line Blocking Avoidance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/55" definition-exists="true" ipc-concordant="H04L49/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/55</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Prevention, detection or correction of errors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/552" definition-exists="false" ipc-concordant="H04L49/552" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/552</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by ensuring the integrity of packets received through redundant connections</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/555" definition-exists="false" ipc-concordant="H04L49/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/557" definition-exists="false" ipc-concordant="H04L49/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error correction, e.g. fault recovery or fault tolerance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/60" definition-exists="true" ipc-concordant="H04L49/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Software-defined switches</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/602" definition-exists="false" ipc-concordant="H04L49/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer or multiprotocol switching, e.g. IP switching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/604" definition-exists="false" ipc-concordant="H04L49/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hybrid IP/Ethernet switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/606" definition-exists="false" ipc-concordant="H04L49/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hybrid ATM switches, e.g. ATM&STM, ATM&Frame Relay or ATM&IP</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/608" definition-exists="false" ipc-concordant="H04L49/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM switches adapted to switch variable length packets, e.g. IP packets</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/65" definition-exists="true" ipc-concordant="H04L49/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/65</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Re-configuration of fast packet switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/70" definition-exists="true" ipc-concordant="H04L49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L49/90" definition-exists="true" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/90</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Buffering arrangements</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L49/90</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L49/9023</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L49/90</class-ref> and <class-ref scheme="cpc">H04L49/9023</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9005" definition-exists="false" ipc-concordant="H04L49/9005" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9005</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using dynamic buffer space allocation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/901" definition-exists="false" ipc-concordant="H04L49/901" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/901</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using storage descriptor, e.g. read or write pointers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9015" definition-exists="false" ipc-concordant="H04L49/9015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9015</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting a linked list</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9021" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plurality of buffers per packet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9023" definition-exists="false" ipc-concordant="H04L49/9023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9023</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for implementing a jitter-buffer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L49/9023</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L49/90</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L49/90</class-ref> and <class-ref scheme="cpc">H04L49/9023</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9026" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single buffer per packet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9031" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wraparound memory, e.g. overrun or underrun detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9036" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Common buffer combined with individual queues</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9042" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Separate storage for different parts of the packet, e.g. header and payload</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9047" definition-exists="false" ipc-concordant="H04L49/9047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9047</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>including multiple buffers, e.g. buffer pools</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/9052" definition-exists="false" ipc-concordant="H04L49/9047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with buffers of different sizes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9057" definition-exists="false" ipc-concordant="H04L49/9057" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9057</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for supporting packet reassembly or resequencing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9063" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermediate storage in different physical parts of a node or terminal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/9068" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the network interface card</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/9073" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Early interruption upon arrival of a fraction of a packet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/9078" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an external memory or storage device</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L49/9084" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reactions to storage capacity overflow</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L49/9089" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L49/9089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>replacing packets in a storage arrangement, e.g. pushout</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L49/9094" definition-exists="false" ipc-concordant="H04L49/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L49/9094</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Arrangements for simultaneous transmit and receive, e.g. simultaneous reading/writing from/to the storage element</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L51/00" definition-exists="true" ipc-concordant="H04L51/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L51/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L51/07</class-ref> and <class-ref scheme="cpc">H04L51/21</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L51/00</class-ref>, <class-ref scheme="cpc">H04L51/07</class-ref> and <class-ref scheme="cpc">H04L51/21</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/02" definition-exists="true" ipc-concordant="H04L51/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using automatic reactions or user delegation, e.g. automatic replies or chatbot-generated messages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/04" definition-exists="true" ipc-concordant="H04L51/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/04</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Real-time or near real-time messaging, e.g. instant messaging [IM]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/043" definition-exists="true" ipc-concordant="H04L51/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/043</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using or handling presence information</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/046" definition-exists="true" ipc-concordant="H04L51/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/046</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Interoperability with other network applications or services</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/06" definition-exists="true" ipc-concordant="H04L51/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Message adaptation to terminal or network requirements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/063" definition-exists="true" ipc-concordant="H04L51/063" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/063</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Content adaptation, e.g. replacement of unsuitable content</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/066" definition-exists="true" ipc-concordant="H04L51/066" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/066</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Format adaptation, e.g. format conversion or compression</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/07" definition-exists="true" ipc-concordant="H04L51/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/07</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>characterised by the inclusion of specific contents</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L51/07</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L51/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L51/00</class-ref> and <class-ref scheme="cpc">H04L51/07</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/08" definition-exists="true" ipc-concordant="H04L51/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Annexed information, e.g. attachments</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/10" definition-exists="true" ipc-concordant="H04L51/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multimedia information</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/18" definition-exists="true" ipc-concordant="H04L51/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/18</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Commands or executable codes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/21" definition-exists="true" ipc-concordant="H04L51/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/21</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Monitoring or handling of messages</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L51/21</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L51/00</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L51/00</class-ref> and <class-ref scheme="cpc">H04L51/21</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/212" definition-exists="true" ipc-concordant="H04L51/212" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/212</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using filtering or selective blocking</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/214" definition-exists="true" ipc-concordant="H04L51/214" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/214</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using selective forwarding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/216" definition-exists="true" ipc-concordant="H04L51/216" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/216</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Handling conversation history, e.g. grouping of messages in sessions or threads</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/222" definition-exists="true" ipc-concordant="H04L51/222" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/222</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using geographical location information, e.g. messages transmitted or received in proximity of a certain spot or area</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/224" definition-exists="true" ipc-concordant="H04L51/224" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/224</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>providing notification on incoming messages, e.g. pushed notifications of received messages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/226" definition-exists="true" ipc-concordant="H04L51/226" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/226</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Delivery according to priorities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/23" definition-exists="true" ipc-concordant="H04L51/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/23</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Reliability checks, e.g. acknowledgments or fault reporting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L51/234" definition-exists="true" ipc-concordant="H04L51/234" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/234</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for tracking messages</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/42" definition-exists="true" ipc-concordant="H04L51/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/42</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Mailbox-related aspects, e.g. synchronisation of mailboxes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/48" definition-exists="true" ipc-concordant="H04L51/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/48</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Message addressing, e.g. address format or anonymous messages, aliases</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/52" definition-exists="true" ipc-concordant="H04L51/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/52</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting social networking services</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/56" definition-exists="true" ipc-concordant="H04L51/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/56</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Unified messaging, e.g. interactions between e-mail, instant messaging or converged IP messaging [CPM]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L51/58" definition-exists="true" ipc-concordant="H04L51/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L51/58</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Message adaptation for wireless communication</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L61/00" definition-exists="true" ipc-concordant="H04L61/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network arrangements, protocols or services for addressing or naming</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>does not cover</u>: <subnote type="bullet"> <note-paragraph>aspects relating to switching or routing which are covered by groups <class-ref scheme="cpc">H04L45/00</class-ref> or <class-ref scheme="cpc">H04L49/00</class-ref>;</note-paragraph><note-paragraph>aspects relating to configuration management of data networks or network elements in general, which are covered by group <class-ref scheme="cpc">H04L41/08</class-ref></note-paragraph><note-paragraph>aspects of addressing in telephony which are covered by group <class-ref scheme="cpc">H04M7/00</class-ref>;</note-paragraph><note-paragraph>aspects of addressing within devices, e.g. process or memory, which are covered by groups <class-ref scheme="cpc">G06F13/42</class-ref> or <class-ref scheme="cpc">G06F12/00</class-ref>.</note-paragraph> </subnote> </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/09" definition-exists="true" ipc-concordant="H04L61/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/09</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Mapping addresses</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L61/09</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L61/09</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/10" definition-exists="true" ipc-concordant="H04L61/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>of different types</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/103" definition-exists="true" ipc-concordant="H04L61/103" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/103</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/106" definition-exists="true" ipc-concordant="H04L61/106" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/106</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>across networks, e.g. mapping telephone numbers to data network addresses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/25" definition-exists="true" ipc-concordant="H04L61/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/25</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>of the same type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/2503" definition-exists="true" ipc-concordant="H04L61/2503" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2503</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Translation of Internet protocol [IP] addresses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/251" definition-exists="true" ipc-concordant="H04L61/251" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/251</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>between different IP versions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2514" definition-exists="true" ipc-concordant="H04L61/2514" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2514</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>between local and global IP addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2517" definition-exists="true" ipc-concordant="H04L61/2517" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2517</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using port numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2521" definition-exists="true" ipc-concordant="H04L61/2521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2521</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Translation architectures other than single NAT servers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2525" definition-exists="true" ipc-concordant="H04L61/2521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2525</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Translation at a client</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2528" definition-exists="true" ipc-concordant="H04L61/2521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Translation at a proxy</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2532" definition-exists="true" ipc-concordant="H04L61/2521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clique of NAT servers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2535" definition-exists="true" ipc-concordant="H04L61/2521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple local networks, e.g. resolving potential IP address conflicts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2539" definition-exists="true" ipc-concordant="H04L61/2539" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2539</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Hiding addresses</text></title-part><title-part><text>Keeping addresses anonymous</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2542" definition-exists="false" ipc-concordant="H04L61/2503" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving dual-stack hosts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2546" definition-exists="true" ipc-concordant="H04L61/2546" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2546</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for avoiding unnecessary translation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/255" definition-exists="true" ipc-concordant="H04L61/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/255</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Maintenance or indexing of mapping tables</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2553" definition-exists="true" ipc-concordant="H04L61/2553" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2553</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Binding renewal aspects, e.g. using keep-alive messages</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2557" definition-exists="true" ipc-concordant="H04L61/2557" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2557</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Translation policies or rules</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/256" definition-exists="true" ipc-concordant="H04L61/256" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/256</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>NAT traversal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2564" definition-exists="true" ipc-concordant="H04L61/256" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2564</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for a higher-layer protocol, e.g. for session initiation protocol [SIP]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2567" definition-exists="true" ipc-concordant="H04L61/2567" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2567</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for reachability, e.g. inquiring the address of a correspondent behind a NAT server</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2571" definition-exists="true" ipc-concordant="H04L61/256" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2571</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for identification, e.g. for authentication or billing  </text><reference><text>charging arrangements <class-ref scheme="cpc">H04L12/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2575" definition-exists="true" ipc-concordant="H04L61/2575" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2575</classification-symbol><class-title date-revised="2022-05-01"> <title-part><text>using address mapping retrieval, e.g. simple traversal of user datagram protocol through session traversal utilities for NAT [STUN]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2578" definition-exists="true" ipc-concordant="H04L61/2578" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2578</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>without involvement of the NAT server</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2582" definition-exists="true" ipc-concordant="H04L61/2582" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2582</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>through control of the NAT server, e.g. using universal plug and play [UPnP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2585" definition-exists="true" ipc-concordant="H04L61/2585" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2585</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>through application level gateway [ALG]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L61/2589" definition-exists="true" ipc-concordant="H04L61/2589" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2589</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>over a relay server, e.g. traversal using relay for network address translation [TURN]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L61/2592" definition-exists="true" ipc-concordant="H04L61/2592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2592</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using tunnelling or encapsulation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/2596" definition-exists="true" ipc-concordant="H04L61/2596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/2596</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Translation of addresses of the same type other than IP, e.g. translation from MAC to MAC addresses</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/30" definition-exists="true" ipc-concordant="H04L61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Managing network names, e.g. use of aliases or nicknames </text><reference><text>name-to-address mapping <class-ref scheme="cpc">H04L61/45</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/3005" definition-exists="false" ipc-concordant="H04L61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L61/3005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanisms for avoiding name conflicts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/301" definition-exists="true" ipc-concordant="H04L61/301" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/301</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Name conversion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/3015" definition-exists="false" ipc-concordant="H04L61/3015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/3015</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Name registration, generation or assignment</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/302" definition-exists="true" ipc-concordant="H04L61/3015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/302</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Administrative registration, e.g. for domain names at internet corporation for assigned names and numbers [ICANN]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/3025" definition-exists="true" ipc-concordant="H04L61/3015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L61/3025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Domain name generation or assignment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/35" definition-exists="false" ipc-concordant="H04L61/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L61/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/45" definition-exists="true" ipc-concordant="H04L61/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/45</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network directories</text></title-part><title-part><text>Name-to-address mapping</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4505" definition-exists="true" ipc-concordant="H04L61/4505" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4505</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using standardised directories</text></title-part><title-part><text>using standardised directory access protocols</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/4511" definition-exists="true" ipc-concordant="H04L61/4511" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4511</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using domain name system [DNS]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/4517" definition-exists="true" ipc-concordant="H04L61/4517" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4517</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using open systems interconnection [OSI] directories, e.g. X.500</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/4523" definition-exists="true" ipc-concordant="H04L61/4523" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4523</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using lightweight directory access protocol [LDAP]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4535" definition-exists="true" ipc-concordant="H04L61/4535" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4535</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4541" definition-exists="true" ipc-concordant="H04L61/4541" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4541</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Directories for service discovery</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4547" definition-exists="true" ipc-concordant="H04L61/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4547</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>for personal communications, i.e. using a personal identifier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4552" definition-exists="true" ipc-concordant="H04L61/4552" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4552</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Lookup mechanisms between a plurality of directories</text></title-part><title-part><text>Synchronisation of directories, e.g. metadirectories</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4553" definition-exists="true" ipc-concordant="H04L61/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4553</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Object oriented directories, e.g. common object request broker architecture [CORBA] name server</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4555" definition-exists="true" ipc-concordant="H04L61/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4555</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Directories for electronic mail or instant messaging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4557" definition-exists="true" ipc-concordant="H04L61/4557" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4557</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Directories for hybrid networks, e.g. including telephone numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/457" definition-exists="false" ipc-concordant="H04L61/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/457</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>containing identifiers of data entities on a computer, e.g. file names</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4588" definition-exists="true" ipc-concordant="H04L61/4588" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4588</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing mobile subscriber information, e.g. home subscriber server [HSS]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/4594" definition-exists="true" ipc-concordant="H04L61/4594" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/4594</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address books, i.e. directories containing contact information about correspondents </text><reference><text>telephone directories in user terminals <class-ref scheme="cpc">H04M1/27453</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/50" definition-exists="true" ipc-concordant="H04L61/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address allocation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5007" definition-exists="true" ipc-concordant="H04L61/5007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5007</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Internet protocol [IP] addresses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/5014" definition-exists="true" ipc-concordant="H04L61/5014" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5014</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L61/503" definition-exists="true" ipc-concordant="H04L61/503" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/503</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using an authentication, authorisation and accounting [AAA] protocol, e.g. remote authentication dial-in user service [RADIUS] or Diameter</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5038" definition-exists="true" ipc-concordant="H04L61/5038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5038</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5046" definition-exists="true" ipc-concordant="H04L61/5046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5046</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Resolving address allocation conflicts</text></title-part><title-part><text>Testing of addresses </text><reference><text>testing when self-assigning an address <class-ref scheme="cpc">H04L61/5092</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5053" definition-exists="true" ipc-concordant="H04L61/5053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5053</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Lease time</text></title-part><title-part><text>Renewal aspects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5061" definition-exists="true" ipc-concordant="H04L61/5061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5061</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Pools of addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5069" definition-exists="true" ipc-concordant="H04L61/5069" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5069</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for group communication, multicast communication or broadcast communication</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5076" definition-exists="true" ipc-concordant="H04L61/5076" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5076</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Update or notification mechanisms, e.g. DynDNS</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5084" definition-exists="true" ipc-concordant="H04L61/5084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5084</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Providing for device mobility </text><reference><text>network addressing or numbering for mobility support in wireless networks <class-ref scheme="cpc">H04W8/26</class-ref>; mobile IP <class-ref scheme="cpc">H04W80/04</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L61/5092" definition-exists="true" ipc-concordant="H04L61/5092" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/5092</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by self-assignment, e.g. picking addresses at random and testing if they are already in use</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/58" definition-exists="true" ipc-concordant="H04L61/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/58</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Caching of addresses or names</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L61/59" definition-exists="true" ipc-concordant="H04L61/59" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L61/59</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using proxies for addressing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L63/00" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L63/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network architectures or network communication protocols for network security </text><reference><text>cryptographic mechanisms or cryptographic arrangements for secret or secure communication <class-ref scheme="cpc">H04L9/00</class-ref>; network architectures or network communication protocols for wireless network security <class-ref scheme="cpc">H04W12/00</class-ref>; security arrangements for protecting computers or computer systems against unauthorised activity <class-ref scheme="cpc">G06F21/00</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L63/00</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L63/00</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/02" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for separating internal from external traffic, e.g. firewalls</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0209" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Architectural arrangements, e.g. perimeter networks or demilitarized zones</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0218" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed architectures, e.g. distributed firewalls</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0227" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L63/0227</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Filtering policies </text><reference><text>mail message filtering <class-ref scheme="cpc">H04L51/212</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0236" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filtering by address, protocol, port number or service, e.g. IP-address or URL</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0245" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filtering by information in the payload</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0254" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stateful filtering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0263" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rule management</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0272" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Virtual private networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0281" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Proxies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/029" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Firewall traversal, e.g. tunnelling or, creating pinholes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/04" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for providing a confidential data exchange among entities communicating through data packet networks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0407" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the identity of one or more communicating identities is hidden </text><reference><text>cryptographic mechanisms or cryptographic arrangements for anonymous credentials or for identity based cryptographic systems <class-ref scheme="cpc">H04L9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0414" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during transmission, i.e. party's identity is protected against eavesdropping, e.g. by using temporary identifiers, but is known to the other party or parties involved in the communication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0421" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anonymous communication, i.e. the party's identifiers are hidden from the other party or parties, e.g. using an anonymizer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0428" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0428</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>wherein the data content is protected, e.g. by encrypting or encapsulating the payload</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0435" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption </text><reference><text>cryptographic mechanisms or cryptographic arrangements for symmetric key encryption <class-ref scheme="cpc">H04L9/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0442" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption </text><reference><text>cryptographic mechanisms or cryptographic arrangements for public-key encryption <class-ref scheme="cpc">H04L9/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/045" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption </text><reference><text>cryptographic mechanisms or cryptographic arrangements using a plurality of keys or algorithms <class-ref scheme="cpc">H04L9/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0457" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption </text><reference><text>cryptographic mechanisms or cryptographic arrangements for stream encryption <class-ref scheme="cpc">H04L9/065</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0464" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using hop-by-hop encryption, i.e. wherein an intermediate entity decrypts the information and re-encrypts it before forwarding it</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0471" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying encryption by an intermediary, e.g. receiving clear information at the intermediary and encrypting the received information at the intermediary before forwarding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0478" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying multiple layers of encryption, e.g. nested tunnels or encrypting the content with a first key and then with at least a second key </text><reference><text>cryptographic mechanisms or cryptographic arrangements using a plurality of keys or algorithms <class-ref scheme="cpc">H04L9/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0485" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Networking architectures for enhanced packet encryption processing, e.g. offloading of IPsec packet processing or efficient security association look-up</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0492" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a location-limited connection, e.g. near-field communication or limited proximity of entities</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/06" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for supporting key management in a packet data network </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key management <class-ref scheme="cpc">H04L9/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/061" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for key exchange, e.g. in peer-to-peer networks </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key agreement <class-ref scheme="cpc">H04L9/0838</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/062" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for key distribution, e.g. centrally by trusted party </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party <class-ref scheme="cpc">H04L9/0819</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/064" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hierarchical key distribution, e.g. by multi-tier trusted parties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/065" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for group communications </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key management involving conference or group key <class-ref scheme="cpc">H04L9/0833</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/067" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one-time keys </text><reference><text>cryptographic mechanisms or cryptographic arrangements for generation of one-time passwords <class-ref scheme="cpc">H04L9/0863</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/068" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using time-dependent keys, e.g. periodically changing keys </text><reference><text>cryptographic mechanisms or cryptographic arrangements for controlling usage of secret information <class-ref scheme="cpc">H04L9/088</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/08" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for supporting authentication of entities communicating through a packet data network </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication <class-ref scheme="cpc">H04L9/32</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0807" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0807</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tickets, e.g. Kerberos </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication using tickets or tokens <class-ref scheme="cpc">H04L9/3213</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0815" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing single-sign-on or federations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0823" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using certificates </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication involving certificates <class-ref scheme="cpc">H04L9/3263</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/083" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using passwords </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code <class-ref scheme="cpc">H04L9/3226</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0838" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one-time-passwords</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/0846" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using time-dependent-passwords, e.g. periodically changing passwords</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0853" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an additional device, e.g. smartcard, SIM or a different communication terminal </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices <class-ref scheme="cpc">H04L9/3234</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0861" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using biometrical features, e.g. fingerprint, retina-scan </text><reference><text>cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data <class-ref scheme="cpc">H04L9/3231</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0869" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for achieving mutual authentication </text><reference><text>cryptographic mechanisms or cryptographic arrangements for mutual authentication <class-ref scheme="cpc">H04L9/3273</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0876" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0884" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0884</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>by delegation of authentication, e.g. a proxy authenticates an entity to be authenticated on behalf of this entity vis-à-vis an authentication entity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/0892" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/0892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using authentication-authorization-accounting [AAA] servers or protocols</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/10" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/10</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>for controlling access to network resources </text><reference><text>restricting network management access <class-ref scheme="cpc">H04L41/28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/101" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access control lists [ACL]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/102" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Entity profiles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/104" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grouping of entities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/105" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple levels of security</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/107" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the security policies are location-dependent, e.g. entities privileges depend on current location or allowing specific operations only from locally connected terminals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/108" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>when the policy decisions are valid for a limited amount of time</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/12" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applying verification of the received information </text><reference><text>cryptographic mechanisms or cryptographic arrangements for data integrity or data verification <class-ref scheme="cpc">H04L9/32</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/123" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>received data contents, e.g. message integrity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/126" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the source of the received data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/14" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for detecting or protecting against malicious traffic</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/1408" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1408</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>by monitoring network traffic </text><reference><text>monitoring network traffic <u>per se</u> <class-ref scheme="cpc">H04L43/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1416" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Event detection, e.g. attack signature detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1425" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Traffic logging, e.g. anomaly detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/1433" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vulnerability analysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/1441" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Countermeasures against malicious traffic </text><reference><text>countermeasures against attacks on cryptographic mechanisms <class-ref scheme="cpc">H04L9/002</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/145" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the attack involving the propagation of malware through the network, e.g. viruses, trojans or worms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1458" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Denial of Service</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1466" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1475" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passive attacks, e.g. eavesdropping or listening without modification of the traffic monitored</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1483" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>service impersonation, e.g. phishing, pharming or web spoofing </text><reference><text>detection of rogue wireless access points <class-ref scheme="cpc">H04W12/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L63/1491" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/1491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using deception as countermeasure, e.g. honeypots, honeynets, decoys or entrapment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/16" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Implementing security features at a particular protocol layer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/162" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the data link layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/164" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the network layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/166" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the transport layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/168" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>above the transport layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/18" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using different networks or paths for security, e.g. using out of band channels </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths <class-ref scheme="cpc">H04L9/0827</class-ref>; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels <class-ref scheme="cpc">H04L9/3215</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/20" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for managing network security; network security policies in general </text><reference><text>filtering policies <class-ref scheme="cpc">H04L63/0227</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/205" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving negotiation or determination of the one or more network security mechanisms to be used, e.g. by negotiation between the client and the server or between peers or by selection according to the capabilities of the entities involved </text><reference><text>negotiation of communication capabilities <class-ref scheme="cpc">H04L69/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L63/30" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for supporting lawful interception, monitoring or retaining of communications or communication related information </text><reference><text>circuit switched telephony call monitoring <class-ref scheme="cpc">H04M3/2281</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/302" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>gathering intelligence information for situation awareness or reconnaissance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/304" definition-exists="true" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intercepting circuit switched data communications </text><reference><text>lawful interception of wireless network communications <class-ref scheme="cpc">H04W12/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/306" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intercepting packet switched data communications, e.g. Web, Internet or IMS communications</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L63/308" definition-exists="false" ipc-concordant="H04L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>H04L63/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>retaining data, e.g. retaining successful, unsuccessful communication attempts, internet access, or e-mail, internet telephony, intercept related information or call content</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L65/00" definition-exists="true" ipc-concordant="H04L65/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network arrangements, protocols or services for supporting real-time applications in data packet communication </text><reference><text>real-time or near real-time messaging, e.g. instant messaging [IM] <class-ref scheme="cpc">H04L51/04</class-ref>; selective video distribution <class-ref scheme="cpc">H04N21/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph><CPC-specific-note>This group <u>covers</u>: <subnote type="bullet"><note-paragraph>only communications which fulfill the following two conditions: <subnote type="roman"><note-paragraph>they are based on packet data; </note-paragraph><note-paragraph>there is real-time or pseudo-real-time temporal association between source and destination, or source and network, or destination and network; </note-paragraph></subnote></note-paragraph><note-paragraph>provided that the above two conditions are met, this group <u>covers</u> arrangements relating to <subnote type="alpha"><note-paragraph>the transmission of the multimedia data itself, </note-paragraph><note-paragraph>the user-to-user, user-to-network, inter-network or intra-network signalling supporting: <subnote><note-paragraph>b1. the establishment of a session for the subsequent transmission of the multimedia data, or </note-paragraph><note-paragraph>b2. the maintenance of the session or </note-paragraph><note-paragraph>b3. the application services available to the user during the session (unless explicitly excluded in certain cases). </note-paragraph></subnote></note-paragraph></subnote></note-paragraph></subnote></CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>This group <u>does not cover</u>:<subnote type="bullet"> <note-paragraph>non-real-time multimedia file transfer, which is covered by group <class-ref scheme="cpc">H04L67/06</class-ref>;</note-paragraph><note-paragraph>multimedia store or forward messaging as in e-mail, MMS or the like, which is covered by group <class-ref scheme="cpc">H04L51/00</class-ref>;</note-paragraph><note-paragraph>analogue video streaming, as in analogue television systems, which is covered by group <class-ref scheme="cpc">H04N7/00</class-ref>;</note-paragraph><note-paragraph>selective distribution of MPEG elementary or transport streams, containing video and/or additional data, which is covered by group <class-ref scheme="cpc">H04N21/00</class-ref>;</note-paragraph><note-paragraph>bit streaming, i.e. not packet-based, such as in ISDN, which is covered by group <class-ref scheme="cpc">H04Q11/0428</class-ref>;</note-paragraph><note-paragraph>instant messaging, which is covered by group <class-ref scheme="cpc">H04L51/04</class-ref>;</note-paragraph><note-paragraph>any other multimodal data communications which do not meet the conditions of being packet-based and real-time or pseudo-real-time;</note-paragraph><note-paragraph>flow control in packet switching networks, which is covered by group <class-ref scheme="cpc">H04L47/10</class-ref>.</note-paragraph> </subnote> </CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>In this group the following terms or expressions are used with the meaning indicated: <subnote type="bullet"><note-paragraph>H.323 means International Telecommunication Union Recommendation no. 323, series H, entitled "Packet-based multimedia communications systems" </note-paragraph><note-paragraph>IP means Internet Protocol </note-paragraph><note-paragraph>IMS means IP Multimedia Subsystem </note-paragraph><note-paragraph>ISDN means Integrated Services Digital Network </note-paragraph><note-paragraph>MGC means Media Gateway Control/Controller </note-paragraph><note-paragraph>MGCP means Media Gateway Control Protocol </note-paragraph><note-paragraph>MMS means Multimedia Messaging Service </note-paragraph><note-paragraph>PBX means Private Branch Exchange </note-paragraph><note-paragraph>PSTN means Public Switched Telephone Network </note-paragraph><note-paragraph>QoS means Quality of Service </note-paragraph><note-paragraph>RTP means Real Time Protocol </note-paragraph><note-paragraph>RTCP means Real Time Control Protocol </note-paragraph><note-paragraph>RTSP means Real Time Streaming Protocol. </note-paragraph><note-paragraph>SIP means Session Initiation Protocol </note-paragraph><note-paragraph>SPAM means unsolicited electronic mail </note-paragraph><note-paragraph>SPIT means SPAM Prevention in IP Telephony</note-paragraph></subnote></CPC-specific-note></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L65/10" definition-exists="true" ipc-concordant="H04L65/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Architectures or entities</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1013" definition-exists="true" ipc-concordant="H04L65/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L65/1013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network architectures, gateways, control or user entities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1016" definition-exists="true" ipc-concordant="H04L65/1016" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1016</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>IP multimedia subsystem [IMS]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/102" definition-exists="true" ipc-concordant="H04L65/102" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/102</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Gateways </text><reference><text>arrangements for connecting between networks having differing types of switching systems, e.g. gateways, <class-ref scheme="cpc">H04L12/66</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1023" definition-exists="true" ipc-concordant="H04L65/1023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1023</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Media gateways</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L65/1026" definition-exists="true" ipc-concordant="H04L65/1023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the edge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L65/103" definition-exists="true" ipc-concordant="H04L65/1023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the network</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1033" definition-exists="true" ipc-concordant="H04L65/1033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1033</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Signalling gateways</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L65/1036" definition-exists="true" ipc-concordant="H04L65/1033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the edge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L65/104" definition-exists="true" ipc-concordant="H04L65/1033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/104</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>in the network</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1043" definition-exists="true" ipc-concordant="H04L65/1043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1043</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Gateway controllers, e.g. media gateway control protocol [MGCP] controllers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1045" definition-exists="true" ipc-concordant="H04L65/1045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1045</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Proxies, e.g. for session initiation protocol [SIP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1046" definition-exists="true" ipc-concordant="H04L65/1046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1046</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Call controllers</text></title-part><title-part><text>Call servers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1053" definition-exists="true" ipc-concordant="H04L65/1053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1053</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>IP private branch exchange [PBX] functionality entities or arrangements </text><reference><text>circuit switched PBXs <class-ref scheme="cpc">H04M3/00</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L65/1053</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L65/1055</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1053</class-ref> and <class-ref scheme="cpc">H04L65/1055</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1055" definition-exists="true" ipc-concordant="H04L65/1055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1055</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Single-site</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/1055</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/1053</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1053</class-ref> and <class-ref scheme="cpc">H04L65/1055</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1056" definition-exists="true" ipc-concordant="H04L65/1056" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1056</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multi-site</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1059" definition-exists="true" ipc-concordant="H04L65/1059" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1059</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>End-user terminal functionalities specially adapted for real-time communication</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1063" definition-exists="true" ipc-concordant="H04L65/1063" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1063</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Application servers providing network services </text><reference><text>systems providing special services to telephonic subscribers <class-ref scheme="cpc">H04M3/42</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L65/1066" definition-exists="true" ipc-concordant="H04L65/1066" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1066</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Session management</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1069" definition-exists="true" ipc-concordant="H04L65/1069" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1069</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Session establishment or de-establishment</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1073" definition-exists="true" ipc-concordant="H04L65/1073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1073</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Registration or de-registration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1076" definition-exists="true" ipc-concordant="H04L65/1076" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1076</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Screening of IP real time communications, e.g. spam over Internet telephony [SPIT]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1079" definition-exists="true" ipc-concordant="H04L65/1076" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1079</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>of unsolicited session attempts, e.g. SPIT</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1083" definition-exists="true" ipc-concordant="H04L65/1083" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1083</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>In-session procedures</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L65/1083</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L65/1094</class-ref> and <class-ref scheme="cpc">H04L65/1095</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1083</class-ref>, <class-ref scheme="cpc">H04L65/1094</class-ref> and <class-ref scheme="cpc">H04L65/1095</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1086" definition-exists="true" ipc-concordant="H04L65/1083" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1086</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>session scope modification</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1089" definition-exists="true" ipc-concordant="H04L65/1089" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1089</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by adding media</text></title-part><title-part><text>by removing media</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1093" definition-exists="true" ipc-concordant="H04L65/1093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1093</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>by adding participants</text></title-part><title-part><text>by removing participants</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1094" definition-exists="true" ipc-concordant="H04L65/1094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1094</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Inter-user-equipment sessions transfer or sharing</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/1094</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/1083</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1083</class-ref> and <class-ref scheme="cpc">H04L65/1094</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1095" definition-exists="false" ipc-concordant="H04L65/1095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1095</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Inter-network session transfer or sharing</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/1095</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/1083</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1083</class-ref> and <class-ref scheme="cpc">H04L65/1095</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1096" definition-exists="true" ipc-concordant="H04L65/1096" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1096</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Supplementary features, e.g. call forwarding or call holding </text><reference><text>systems providing special services or facilities to telephony subscribers <class-ref scheme="cpc">H04M3/42</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/1101" definition-exists="true" ipc-concordant="H04L65/1101" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1101</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Session protocols</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L65/1101</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L65/1108</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1101</class-ref> and <class-ref scheme="cpc">H04L65/1108</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1104" definition-exists="true" ipc-concordant="H04L65/1104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1104</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Session initiation protocol [SIP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1106" definition-exists="true" ipc-concordant="H04L65/1106" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1106</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Call signalling protocols</text></title-part><title-part><text>H.323 and related</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/1108" definition-exists="true" ipc-concordant="H04L65/1108" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/1108</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Web based protocols, e.g. webRTC</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/1108</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/1101</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/1101</class-ref> and <class-ref scheme="cpc">H04L65/1108</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L65/40" definition-exists="true" ipc-concordant="H04L65/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Support for services or applications</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L65/40</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L65/401</class-ref>, <class-ref scheme="cpc">H04L65/4015</class-ref>, <class-ref scheme="cpc">H04L65/402</class-ref>, <class-ref scheme="cpc">H04L65/403</class-ref>, <class-ref scheme="cpc">H04L65/4038</class-ref>, <class-ref scheme="cpc">H04L65/4046</class-ref>, <class-ref scheme="cpc">H04L65/4053</class-ref> and <class-ref scheme="cpc">H04L65/4061</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/401" definition-exists="true" ipc-concordant="H04L65/401" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/401</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L65/401</class-ref> and <class-ref scheme="cpc">H04L65/4015</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/40</class-ref>, <class-ref scheme="cpc">H04L65/401</class-ref> and <class-ref scheme="cpc">H04L65/4015</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/4015" definition-exists="true" ipc-concordant="H04L65/401" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/4015</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/402" definition-exists="true" ipc-concordant="H04L65/402" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/402</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>wherein the services involve a main real-time session and one or more additional parallel non-real time sessions, e.g. downloading a file in a parallel FTP session, initiating an email or combinational services</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/402</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/40</class-ref> and <class-ref scheme="cpc">H04L65/402</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/4025" definition-exists="true" ipc-concordant="H04L65/402" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/4025</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>where none of the additional parallel sessions is real time or time sensitive, e.g. downloading a file in a parallel FTP session, initiating an email or combinational services</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/403" definition-exists="true" ipc-concordant="H04L65/403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/403</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Arrangements for multi-party communication, e.g. for conferences </text><reference><text>data switching systems for conference <class-ref scheme="cpc">H04L12/18</class-ref>; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities <class-ref scheme="cpc">H04M3/56</class-ref>; television conferencing systems <class-ref scheme="cpc">H04N7/15</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L65/403</class-ref>, <class-ref scheme="cpc">H04L65/4038</class-ref>, <class-ref scheme="cpc">H04L65/4046</class-ref> and <class-ref scheme="cpc">H04L65/4053</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/40</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/4038" definition-exists="true" ipc-concordant="H04L65/4038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/4038</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>with floor control</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/4046" definition-exists="true" ipc-concordant="H04L65/403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L65/4046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with distributed floor control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/4053" definition-exists="true" ipc-concordant="H04L65/4053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/4053</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>without floor control</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/4061" definition-exists="true" ipc-concordant="H04L65/4061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/4061</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Push-to services, e.g. push-to-talk or push-to-video</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/4061</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L65/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L65/40</class-ref> and <class-ref scheme="cpc">H04L65/4061</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L65/60" definition-exists="true" ipc-concordant="H04L65/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network streaming of media packets</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L65/60</class-ref>, <class-ref scheme="cpc">H04L65/61</class-ref>, <class-ref scheme="cpc">H04L65/611</class-ref>, <class-ref scheme="cpc">H04L65/612</class-ref>, <class-ref scheme="cpc">H04L65/613</class-ref>, <class-ref scheme="cpc">H04L65/65</class-ref> and <class-ref scheme="cpc">H04L65/70</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/61" definition-exists="true" ipc-concordant="H04L65/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/61</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting one-way streaming services, e.g. Internet radio</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/611" definition-exists="true" ipc-concordant="H04L65/611" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/611</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for multicast or broadcast </text><reference><text>systems for broadcast or conference <class-ref scheme="cpc">H04L12/18</class-ref>; arrangements for broadcast or distribution combined with broadcast <class-ref scheme="cpc">H04H20/00</class-ref>; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time <class-ref scheme="cpc">H04H60/00</class-ref>; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], <class-ref scheme="cpc">H04W4/06</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/612" definition-exists="true" ipc-concordant="H04L65/612" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/612</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for unicast</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/613" definition-exists="true" ipc-concordant="H04L65/613" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/613</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for the control of the source by the destination </text><reference><text>control signals issued by the client directed to the server or network components specially adapted for selective content distribution <class-ref scheme="cpc">H04N21/637</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/65" definition-exists="true" ipc-concordant="H04L65/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/65</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/70" definition-exists="true" ipc-concordant="H04L65/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/70</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Media network packetisation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L65/75" definition-exists="true" ipc-concordant="H04L65/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/75</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Media network packet handling</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/75</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>Group <class-ref scheme="cpc">H04L65/75</class-ref> is also impacted by reclassification into groups <class-ref scheme="cpc">H04L65/752</class-ref> and <class-ref scheme="cpc">H04L65/756</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/752" definition-exists="false" ipc-concordant="H04L65/752" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/752</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>adapting media to network capabilities</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/752</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L65/75</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L65/75</class-ref> and <class-ref scheme="cpc">H04L65/752</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/756" definition-exists="false" ipc-concordant="H04L65/756" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/756</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>adapting media to device capabilities</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L65/756</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L65/75</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L65/75</class-ref> and <class-ref scheme="cpc">H04L65/756</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/762" definition-exists="true" ipc-concordant="H04L65/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/762</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>at the source  </text><reference><text>reformatting of additional data in video distribution servers <class-ref scheme="cpc">H04N21/2355</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/764" definition-exists="true" ipc-concordant="H04L65/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/764</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>at the destination  </text><reference><text>reformatting of additional data in video clients <class-ref scheme="cpc">H04N21/4355</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L65/765" definition-exists="true" ipc-concordant="H04L65/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/765</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>intermediate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L65/80" definition-exists="true" ipc-concordant="H04L65/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L65/80</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Responding to QoS</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L67/00" definition-exists="true" ipc-concordant="H04L67/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network arrangements or protocols for supporting network services or applications </text><reference><text>user-to-user messaging <class-ref scheme="cpc">H04L51/00</class-ref>; network arrangements, protocols or services for supporting real-time applications in data packet communications networks <class-ref scheme="cpc">H04L65/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u>:<subnote type="number"><note-paragraph>Networking arrangements or communication protocols to support networked applications which occur at the abstract network layers 5 to 7 of the OSI layer model. The higher layers constitute the interface between the network and the computer applications that use the network to communicate. </note-paragraph><note-paragraph>Network-specific aspects of client-server applications as well as of networking arrangements supporting networked/distributed applications, e.g. data transport, scheduling. This group also covers specific networked application layer protocols, e.g. FTP, WAP, HTTP.</note-paragraph></subnote></note-paragraph><note-paragraph>This group <u>does not cover</u>:<subnote type="number"><note-paragraph>Distributed applications which are network-agnostic, i.e. distributed information systems for which the network functions are transparent. These field are covered, e.g. by <class-ref scheme="cpc">G06F9/00</class-ref>, <class-ref scheme="cpc">G06F17/00</class-ref>. Data switching network provisions in general and the lower layer network functionalities which support application layer provisions are covered by <class-ref scheme="cpc">H04L12/00</class-ref> </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L67/01" definition-exists="true" ipc-concordant="H04L67/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/01</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocols</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/01</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>Group <class-ref scheme="cpc">H04L67/01</class-ref> is also impacted by reclassification into groups <class-ref scheme="cpc">H04L67/02</class-ref>, <class-ref scheme="cpc">H04L67/025</class-ref>, <class-ref scheme="cpc">H04L67/04</class-ref>, <class-ref scheme="cpc">H04L67/06</class-ref>, <class-ref scheme="cpc">H04L67/08</class-ref>, <class-ref scheme="cpc">H04L67/10</class-ref>, <class-ref scheme="cpc">H04L67/1001</class-ref>, <class-ref scheme="cpc">H04L67/1004</class-ref>, <class-ref scheme="cpc">H04L67/1006</class-ref>, <class-ref scheme="cpc">H04L67/1008</class-ref>, <class-ref scheme="cpc">H04L67/101</class-ref>, <class-ref scheme="cpc">H04L67/1012</class-ref>, <class-ref scheme="cpc">H04L67/1014</class-ref>, <class-ref scheme="cpc">H04L67/1017</class-ref>, <class-ref scheme="cpc">H04L67/1019</class-ref>, <class-ref scheme="cpc">H04L67/1021</class-ref>, <class-ref scheme="cpc">H04L67/1023</class-ref>, <class-ref scheme="cpc">H04L67/1025</class-ref>, <class-ref scheme="cpc">H04L67/1027</class-ref>, <class-ref scheme="cpc">H04L67/1029</class-ref>, <class-ref scheme="cpc">H04L67/1031</class-ref>, <class-ref scheme="cpc">H04L67/1034</class-ref>, <class-ref scheme="cpc">H04L67/1036</class-ref>, <class-ref scheme="cpc">H04L67/1038</class-ref>, <class-ref scheme="cpc">H04L67/104</class-ref>, <class-ref scheme="cpc">H04L67/1042</class-ref>, <class-ref scheme="cpc">H04L67/1044</class-ref>, <class-ref scheme="cpc">H04L67/1046</class-ref>, <class-ref scheme="cpc">H04L67/1048</class-ref>, <class-ref scheme="cpc">H04L67/1051</class-ref>, <class-ref scheme="cpc">H04L67/1053</class-ref>, <class-ref scheme="cpc">H04L67/1055</class-ref>, <class-ref scheme="cpc">H04L67/1057</class-ref>, <class-ref scheme="cpc">H04L67/1059</class-ref>, <class-ref scheme="cpc">H04L67/1061</class-ref>, <class-ref scheme="cpc">H04L67/1063</class-ref>, <class-ref scheme="cpc">H04L67/1065</class-ref>, <class-ref scheme="cpc">H04L67/1068</class-ref>, <class-ref scheme="cpc">H04L67/107</class-ref>, <class-ref scheme="cpc">H04L67/1072</class-ref>, <class-ref scheme="cpc">H04L67/1074</class-ref>, <class-ref scheme="cpc">H04L67/1076</class-ref>, <class-ref scheme="cpc">H04L67/1078</class-ref>, <class-ref scheme="cpc">H04L67/108</class-ref>, <class-ref scheme="cpc">H04L67/1082</class-ref>, <class-ref scheme="cpc">H04L67/1085</class-ref>, <class-ref scheme="cpc">H04L67/1087</class-ref>, <class-ref scheme="cpc">H04L67/1089</class-ref>, <class-ref scheme="cpc">H04L67/1091</class-ref>, <class-ref scheme="cpc">H04L67/1093</class-ref>, <class-ref scheme="cpc">H04L67/1095</class-ref>, <class-ref scheme="cpc">H04L67/1097</class-ref>, <class-ref scheme="cpc">H04L67/12</class-ref>, <class-ref scheme="cpc">H04L67/125</class-ref>, <class-ref scheme="cpc">H04L67/131</class-ref>, <class-ref scheme="cpc">H04L67/133</class-ref>, <class-ref scheme="cpc">H04L67/1396</class-ref>, <class-ref scheme="cpc">H04L67/2866</class-ref>, <class-ref scheme="cpc">H04L67/2869</class-ref>, <class-ref scheme="cpc">H04L67/2871</class-ref>, <class-ref scheme="cpc">H04L67/2876</class-ref>, <class-ref scheme="cpc">H04L67/288</class-ref>, <class-ref scheme="cpc">H04L67/2885</class-ref>, <class-ref scheme="cpc">H04L67/289</class-ref>, <class-ref scheme="cpc">H04L67/2895</class-ref>, <class-ref scheme="cpc">H04L67/30</class-ref>, <class-ref scheme="cpc">H04L67/303</class-ref> and <class-ref scheme="cpc">H04L67/306</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/02" definition-exists="true" ipc-concordant="H04L67/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on web technology, e.g. hypertext transfer protocol [HTTP]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L67/02</class-ref> and <class-ref scheme="cpc">H04L67/025</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref>, <class-ref scheme="cpc">H04L67/02</class-ref> and <class-ref scheme="cpc">H04L67/025</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/025" definition-exists="true" ipc-concordant="H04L67/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/025</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for remote control or remote monitoring of applications</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/04" definition-exists="true" ipc-concordant="H04L67/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/04</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for terminals or networks with limited capabilities</text></title-part><title-part><text>specially adapted for terminal portability</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/04</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/04</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/06" definition-exists="true" ipc-concordant="H04L67/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for file transfer, e.g. file transfer protocol [FTP]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/06</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/06</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/08" definition-exists="true" ipc-concordant="H04L67/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for terminal emulation, e.g. Telnet</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/08</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/08</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/10" definition-exists="true" ipc-concordant="H04L67/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in which an application is distributed across nodes in the network </text><reference><text>software deployment <class-ref scheme="cpc">G06F8/60</class-ref>; multiprogramming arrangements <class-ref scheme="cpc">G06F9/46</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/10</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/10</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/1001" definition-exists="true" ipc-concordant="H04L67/1001" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1001</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for accessing one among a plurality of replicated servers</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1001</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1001</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/10015" definition-exists="false" ipc-concordant="H04L67/1001" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/10015</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Access to distributed or replicated servers, e.g. using brokers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/10015</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/10015</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1004" definition-exists="true" ipc-concordant="H04L67/1004" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1004</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Server selection for load balancing</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1004</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1004</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1006" definition-exists="true" ipc-concordant="H04L67/1006" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1006</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>with static server selection, e.g. the same server being selected for a specific client</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1006</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1006</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1008" definition-exists="true" ipc-concordant="H04L67/1008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1008</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on parameters of servers, e.g. available memory or workload </text><reference><text>monitoring of computer activity <class-ref scheme="cpc">G06F11/30</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1008</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1008</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/101" definition-exists="true" ipc-concordant="H04L67/101" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/101</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on network conditions</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/101</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/101</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1012" definition-exists="true" ipc-concordant="H04L67/1012" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1012</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on compliance of requirements or conditions with available server resources</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1012</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1012</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1014" definition-exists="true" ipc-concordant="H04L67/1014" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1014</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on the content of a request</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1014</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1014</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1017" definition-exists="true" ipc-concordant="H04L67/1017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1017</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on a round robin mechanism</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1017</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1017</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1019" definition-exists="true" ipc-concordant="H04L67/1019" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1019</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Random or heuristic server selection</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1019</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1019</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1021" definition-exists="true" ipc-concordant="H04L67/1021" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1021</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on client or server locations</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1021</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1021</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1023" definition-exists="true" ipc-concordant="H04L67/1023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1023</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>based on a hash applied to IP addresses or costs</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1023</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1023</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1025" definition-exists="true" ipc-concordant="H04L67/1025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1025</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Dynamic adaptation of the criteria on which the server selection is based</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1025</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1025</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1027" definition-exists="true" ipc-concordant="H04L67/1027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1027</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Persistence of sessions during load balancing</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1027</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1027</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1029" definition-exists="true" ipc-concordant="H04L67/1029" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1029</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using data related to the state of servers by a load balancer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1029</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1029</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1031" definition-exists="true" ipc-concordant="H04L67/1031" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1031</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Controlling of the operation of servers by a load balancer, e.g. adding or removing servers that serve requests</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1031</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1031</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1034" definition-exists="true" ipc-concordant="H04L67/1034" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1034</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Reaction to server failures by a load balancer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1034</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1034</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1036" definition-exists="true" ipc-concordant="H04L67/1036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1036</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1036</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1036</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1038" definition-exists="true" ipc-concordant="H04L67/1038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1038</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Load balancing arrangements to avoid a single path through a load balancer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1038</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1038</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/104" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/104</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Peer-to-peer [P2P] networks</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L67/104</class-ref>, <class-ref scheme="cpc">H04L67/1042</class-ref>, <class-ref scheme="cpc">H04L67/1044</class-ref>, <class-ref scheme="cpc">H04L67/1046</class-ref>, <class-ref scheme="cpc">H04L67/1048</class-ref>, <class-ref scheme="cpc">H04L67/1051</class-ref>, <class-ref scheme="cpc">H04L67/1053</class-ref>, <class-ref scheme="cpc">H04L67/1055</class-ref>, <class-ref scheme="cpc">H04L67/1057</class-ref>, <class-ref scheme="cpc">H04L67/1059</class-ref>, <class-ref scheme="cpc">H04L67/1061</class-ref>, <class-ref scheme="cpc">H04L67/1063</class-ref>, <class-ref scheme="cpc">H04L67/1065</class-ref>, <class-ref scheme="cpc">H04L67/1068</class-ref>, <class-ref scheme="cpc">H04L67/107</class-ref>, <class-ref scheme="cpc">H04L67/1072</class-ref>, <class-ref scheme="cpc">H04L67/1074</class-ref>, <class-ref scheme="cpc">H04L67/1076</class-ref>, <class-ref scheme="cpc">H04L67/1078</class-ref>, <class-ref scheme="cpc">H04L67/108</class-ref>, <class-ref scheme="cpc">H04L67/1082</class-ref>, <class-ref scheme="cpc">H04L67/1085</class-ref>, <class-ref scheme="cpc">H04L67/1087</class-ref>, <class-ref scheme="cpc">H04L67/1089</class-ref>, <class-ref scheme="cpc">H04L67/1091</class-ref> and <class-ref scheme="cpc">H04L67/1093</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1042" definition-exists="true" ipc-concordant="H04L67/1042" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1042</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using topology management mechanisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1044" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1044</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Group management mechanisms  </text><reference><text>management of multicast group membership <class-ref scheme="cpc">H04L12/185</class-ref>; reconfiguring of node membership in a computing system to eliminate errors <class-ref scheme="cpc">G06F11/1425</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1046" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Joining mechanisms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1048" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1048</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Departure or maintenance mechanisms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1051" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Group master selection mechanisms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1053" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with pre-configuration of logical or physical connections with a determined number of other peers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/1055" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving connection limits </text><reference><text>involving dynamic management of active down- or uploading connections <class-ref scheme="cpc">H04L67/1085</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/1057" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving pre-assessment of levels of reputation of peers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1059" definition-exists="true" ipc-concordant="H04L67/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-group management mechanisms, e.g. splitting, merging or interconnection of groups</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1061" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1061</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using node-based peer discovery mechanisms </text><reference><text>static access to replicated servers <class-ref scheme="cpc">H04L67/1006</class-ref>; service discovery <class-ref scheme="cpc">H04L67/51</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1063" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1063</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Discovery through centralising entities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1065" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1065</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Discovery involving distributed pre-established resource-based relationships among peers, e.g. based on distributed hash tables [DHT]  </text><reference><text>pre-configuration of logical or physical connections <class-ref scheme="cpc">H04L67/1053</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1068" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1068</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Discovery involving direct consultation or announcement among potential requesting and potential source peers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/107" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/107</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>with limitation or expansion of the discovery scope</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1072" definition-exists="true" ipc-concordant="H04L67/1061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1072</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Discovery involving ranked list compilation of candidate peers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1074" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1074</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for supporting data block transmission mechanisms </text><reference><text>file transfer <class-ref scheme="cpc">H04L67/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1076" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1076</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Resource dissemination mechanisms or network resource keeping policies for optimal resource availability in the overlay network</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1078" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1078</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Resource delivery mechanisms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/108" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/108</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>characterised by resources being split in blocks or fragments</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/1082" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1082</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>involving incentive schemes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04L67/1085" definition-exists="true" ipc-concordant="H04L67/1074" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1085</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>involving dynamic management of active down- or uploading connections</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/1087" definition-exists="true" ipc-concordant="H04L67/1087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1087</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using cross-functional networking aspects</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1089" definition-exists="true" ipc-concordant="H04L67/1087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hierarchical topologies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1091" definition-exists="true" ipc-concordant="H04L67/1087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interfacing with client-server systems or between P2P systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04L67/1093" definition-exists="true" ipc-concordant="H04L67/1087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Some peer nodes performing special functions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/1095" definition-exists="true" ipc-concordant="H04L67/1095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1095</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1095</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1095</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/1097" definition-exists="true" ipc-concordant="H04L67/1097" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1097</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1097</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1097</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/12" definition-exists="true" ipc-concordant="H04L67/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L67/12</class-ref> and <class-ref scheme="cpc">H04L67/125</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/125" definition-exists="true" ipc-concordant="H04L67/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/125</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>involving control of end-device applications over a network</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/131" definition-exists="true" ipc-concordant="H04L67/131" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/131</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocols for games, networked simulations or virtual reality</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/131</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/131</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/133" definition-exists="true" ipc-concordant="H04L67/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/133</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocols for remote procedure calls [RPC]</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/133</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/133</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/1396" definition-exists="true" ipc-concordant="H04L67/1396" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/1396</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for monitoring users' activity</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/1396</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref>, <class-ref scheme="cpc">H04L67/01</class-ref> and <class-ref scheme="cpc">H04L67/1396</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L67/14" definition-exists="true" ipc-concordant="H04L67/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/14</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Session management </text><reference><text>for real-time applications in data packet communications networks <class-ref scheme="cpc">H04L65/1066</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/141" definition-exists="true" ipc-concordant="H04L67/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/141</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Setup of application sessions </text><reference><text>admission control or resource allocation in data switching networks <class-ref scheme="cpc">H04L47/70</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/142" definition-exists="true" ipc-concordant="H04L67/142" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/142</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Managing session states for stateless protocols</text></title-part><title-part><text>Signalling session states</text></title-part><title-part><text>State transitions</text></title-part><title-part><text>Keeping-state mechanisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/143" definition-exists="true" ipc-concordant="H04L67/143" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/143</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Termination or inactivation of sessions, e.g. event-controlled end of session</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/145" definition-exists="false" ipc-concordant="H04L67/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/145</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>avoiding end of session, e.g. keep-alive, heartbeats, resumption message or wake-up for inactive or interrupted session</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/146" definition-exists="true" ipc-concordant="H04L67/146" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/146</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/147" definition-exists="true" ipc-concordant="H04L67/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/147</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Signalling methods or messages providing extensions to protocols defined by standardisation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/148" definition-exists="true" ipc-concordant="H04L67/148" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/148</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Migration or transfer of sessions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L67/2866" definition-exists="true" ipc-concordant="H04L67/2866" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2866</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Architectures</text></title-part><title-part><text>Arrangements</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L67/2866</class-ref>, <class-ref scheme="cpc">H04L67/2869</class-ref>, <class-ref scheme="cpc">H04L67/2871</class-ref>, <class-ref scheme="cpc">H04L67/2876</class-ref>, <class-ref scheme="cpc">H04L67/288</class-ref>, <class-ref scheme="cpc">H04L67/2885</class-ref>, <class-ref scheme="cpc">H04L67/289</class-ref>, <class-ref scheme="cpc">H04L67/2895</class-ref>, <class-ref scheme="cpc">H04L67/30</class-ref>, <class-ref scheme="cpc">H04L67/303</class-ref> and <class-ref scheme="cpc">H04L67/306</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L67/01</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/2869" definition-exists="true" ipc-concordant="H04L67/2869" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2869</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Terminals specially adapted for communication</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/2871" definition-exists="false" ipc-concordant="H04L67/2871" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2871</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Implementation details of single intermediate entities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/2876" definition-exists="false" ipc-concordant="H04L67/2876" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2876</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Pairs of inter-processing entities at each side of the network, e.g. split proxies</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/288" definition-exists="false" ipc-concordant="H04L67/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/288</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Distributed intermediate devices, i.e. intermediate devices for interaction with other intermediate devices on the same level</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/2885" definition-exists="false" ipc-concordant="H04L67/2885" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2885</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Hierarchically arranged intermediate devices, e.g. for hierarchical caching</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/289" definition-exists="false" ipc-concordant="H04L67/289" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/289</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Intermediate processing functionally located close to the data consumer application, e.g. in same machine, in same home or in same sub-network</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/2895" definition-exists="false" ipc-concordant="H04L67/2895" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/2895</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Intermediate processing functionally located close to the data provider application, e.g. reverse proxies</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/30" definition-exists="true" ipc-concordant="H04L67/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Profiles</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/303" definition-exists="true" ipc-concordant="H04L67/303" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/303</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Terminal profiles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/306" definition-exists="true" ipc-concordant="H04L67/306" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/306</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>User profiles</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L67/34" definition-exists="true" ipc-concordant="H04L67/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/34</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>involving the movement of software or configuration parameters  </text><reference><text>network booting or remote initial program loading [RIPL] <class-ref scheme="cpc">G06F9/4416</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L67/50" definition-exists="true" ipc-concordant="H04L67/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/50</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network services</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L67/50</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L9/40</class-ref>.<br/>Groups <class-ref scheme="cpc">H04L9/40</class-ref> and <class-ref scheme="cpc">H04L67/50</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/51" definition-exists="true" ipc-concordant="H04L67/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/51</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Discovery or management thereof, e.g. service location protocol [SLP] or web services</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/52" definition-exists="true" ipc-concordant="H04L67/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/52</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for the location of the user terminal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/53" definition-exists="true" ipc-concordant="H04L67/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/53</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using third party service providers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/535" definition-exists="true" ipc-concordant="H04L67/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/535</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Tracking the activity of the user </text><reference><text>network monitoring arrangements <class-ref scheme="cpc">H04L43/00</class-ref>; recording of computer activity <class-ref scheme="cpc">G06F11/34</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/54" definition-exists="true" ipc-concordant="H04L67/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/54</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Presence management, e.g. monitoring or registration for receipt of user log-on information, or the connection status of the users</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/55" definition-exists="true" ipc-concordant="H04L67/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/55</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Push-based network services</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/56" definition-exists="true" ipc-concordant="H04L67/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/56</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Provisioning of proxy services </text><reference><text>store-and-forward switching systems in data switching networks <class-ref scheme="cpc">H04L12/54</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/561" definition-exists="true" ipc-concordant="H04L67/561" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/561</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Adding application-functional data or data for application control, e.g. adding metadata</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/562" definition-exists="true" ipc-concordant="H04L67/562" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/562</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Brokering proxy services</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/563" definition-exists="true" ipc-concordant="H04L67/563" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/563</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Data redirection of data network streams</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/564" definition-exists="true" ipc-concordant="H04L67/564" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/564</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Enhancement of application control based on intercepted application data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/565" definition-exists="true" ipc-concordant="H04L67/565" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/565</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Conversion or adaptation of application format or content </text><reference><text>adding application control or application functional data <class-ref scheme="cpc">H04L67/561</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/5651" definition-exists="true" ipc-concordant="H04L67/5651" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/5651</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Reducing the amount or size of exchanged application data</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/566" definition-exists="true" ipc-concordant="H04L67/566" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/566</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Grouping or aggregating service requests, e.g. for unified processing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/567" definition-exists="true" ipc-concordant="H04L67/567" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/567</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Integrating service provisioning from a plurality of service providers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/568" definition-exists="true" ipc-concordant="H04L67/568" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/568</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Storing data temporarily at an intermediate stage, e.g. caching</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/5681" definition-exists="true" ipc-concordant="H04L67/5681" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/5681</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Pre-fetching or pre-delivering data based on network characteristics</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/5682" definition-exists="true" ipc-concordant="H04L67/5682" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/5682</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Policies or rules for updating, deleting or replacing the stored data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L67/5683" definition-exists="true" ipc-concordant="H04L67/5683" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/5683</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Storage of data provided by user terminals, i.e. reverse caching</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/59" definition-exists="true" ipc-concordant="H04L67/59" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/59</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Providing operational support to end devices by off-loading in the network or by emulation, e.g. when they are unavailable</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/60" definition-exists="true" ipc-concordant="H04L67/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources </text><reference><text>admission control or resource allocation <class-ref scheme="cpc">H04L47/70</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/61" definition-exists="false" ipc-concordant="H04L67/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/61</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>taking into account QoS or priority requirements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/62" definition-exists="false" ipc-concordant="H04L67/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/62</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Establishing a time schedule for servicing the requests</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L67/63" definition-exists="false" ipc-concordant="H04L67/63" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/63</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Routing a service request depending on the request content or context</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L67/75" definition-exists="true" ipc-concordant="H04L67/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L67/75</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Indicating network or usage conditions on the user display</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04L69/00" definition-exists="true" ipc-concordant="H04L69/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass </text><reference><text>networks security protocols <class-ref scheme="cpc">H04L9/40</class-ref>; wireless communication networks <class-ref scheme="cpc">H04W</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/02" definition-exists="true" ipc-concordant="H04L69/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L69/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protocol performance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/03" definition-exists="true" ipc-concordant="H04L69/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/03</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Protocol definition or specification  </text><reference><text>protocol conformance testing <class-ref scheme="cpc">H04L1/244</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/04" definition-exists="true" ipc-concordant="H04L69/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/04</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocols for data compression, e.g. ROHC</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/06" definition-exists="true" ipc-concordant="H04L69/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/08" definition-exists="true" ipc-concordant="H04L69/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/08</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocols for interworking</text></title-part><title-part><text>Protocol conversion</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L69/08</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">H04L69/085</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L69/08</class-ref> and <class-ref scheme="cpc">H04L69/085</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/085" definition-exists="false" ipc-concordant="H04L69/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/085</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for interworking of IP-based networks with other networks</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L69/085</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L69/08</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L69/08</class-ref> and <class-ref scheme="cpc">H04L69/085</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/10" definition-exists="true" ipc-concordant="H04L69/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/10</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Streamlined, light-weight or high-speed protocols, e.g. express transfer protocol [XTP] or byte stream</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/12" definition-exists="true" ipc-concordant="H04L69/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/12</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Protocol engines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/14" definition-exists="true" ipc-concordant="H04L69/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/14</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multichannel or multilink protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/16" definition-exists="true" ipc-concordant="H04L69/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/16</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/161" definition-exists="true" ipc-concordant="H04L69/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/161</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L69/162" definition-exists="true" ipc-concordant="H04L69/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L69/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving adaptations of sockets based mechanisms </text><reference><text>secure socket layer <class-ref scheme="cpc">H04L63/168</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/163" definition-exists="true" ipc-concordant="H04L69/163" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/163</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>In-band adaptation of TCP data exchange</text></title-part><title-part><text>In-band control procedures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/164" definition-exists="true" ipc-concordant="H04L69/164" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/164</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Adaptation or special uses of UDP protocol</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/165" definition-exists="true" ipc-concordant="H04L69/165" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/165</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Combined use of TCP and UDP protocols</text></title-part><title-part><text>selection criteria therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/166" definition-exists="true" ipc-concordant="H04L69/166" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/166</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>IP fragmentation</text></title-part><title-part><text>TCP segmentation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/167" definition-exists="true" ipc-concordant="H04L69/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/167</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6 </text><reference><text>translation of Internet protocol [IP] addresses <class-ref scheme="cpc">H04L61/2503</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/168" definition-exists="true" ipc-concordant="H04L69/168" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/168</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/169" definition-exists="true" ipc-concordant="H04L69/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/169</classification-symbol><class-title date-revised="2022-05-01"><title-part><CPC-specific-text><text>Special adaptations of TCP, UDP or IP for interworking of IP based networks with other networks  </text><reference><text>protocols for interworking, protocol conversion <class-ref scheme="cpc">H04L69/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/18" definition-exists="true" ipc-concordant="H04L69/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/18</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multiprotocol handlers, e.g. single devices capable of handling multiple protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/22" definition-exists="true" ipc-concordant="H04L69/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/22</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Parsing or analysis of headers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/24" definition-exists="true" ipc-concordant="H04L69/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/24</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Negotiation of communication capabilities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/26" definition-exists="true" ipc-concordant="H04L69/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>H04L69/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special purpose or proprietary protocols or architectures </text><reference><text>network applications for proprietary or special purpose networking environments <class-ref scheme="cpc">H04L67/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/28" definition-exists="true" ipc-concordant="H04L69/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/28</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Timers or timing mechanisms used in protocols</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/30" definition-exists="true" ipc-concordant="H04L69/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Definitions, standards or architectural aspects of layered protocol stacks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04L69/32" definition-exists="true" ipc-concordant="H04L69/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/32</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">H04L69/32</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">H04L69/321</class-ref>, <class-ref scheme="cpc">H04L69/322</class-ref>, <class-ref scheme="cpc">H04L69/323</class-ref>, <class-ref scheme="cpc">H04L69/324</class-ref>, <class-ref scheme="cpc">H04L69/325</class-ref>, <class-ref scheme="cpc">H04L69/326</class-ref>, <class-ref scheme="cpc">H04L69/327</class-ref>, <class-ref scheme="cpc">H04L69/328</class-ref>, and <class-ref scheme="cpc">H04L69/329</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L69/321" definition-exists="true" ipc-concordant="H04L69/321" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/321</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Interlayer communication protocols or service data unit [SDU] definitions</text></title-part><title-part><text>Interfaces between layers</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">H04L69/321</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L69/32</class-ref>. <br/>Groups <class-ref scheme="cpc">H04L69/32</class-ref> and <class-ref scheme="cpc">H04L69/321</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04L69/322" definition-exists="true" ipc-concordant="H04L69/322" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/322</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">H04L69/322</class-ref> <class-ref scheme="cpc">H04L69/323</class-ref>, <class-ref scheme="cpc">H04L69/324</class-ref>, <class-ref scheme="cpc">H04L69/325</class-ref>, <class-ref scheme="cpc">H04L69/326</class-ref>, <class-ref scheme="cpc">H04L69/327</class-ref>, <class-ref scheme="cpc">H04L69/328</class-ref> and <class-ref scheme="cpc">H04L69/329</class-ref> are incomplete pending reclassification of documents from group <class-ref scheme="cpc">H04L69/32</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/323" definition-exists="true" ipc-concordant="H04L69/323" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/323</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the physical layer [OSI layer 1]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/324" definition-exists="true" ipc-concordant="H04L69/324" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/324</classification-symbol><class-title date-revised="2022-05-01"> <title-part><text>in the data link layer [OSI layer 2], e.g. HDLC</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/325" definition-exists="true" ipc-concordant="H04L69/325" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/325</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the network layer [OSI layer 3], e.g. X.25 </text><reference><text><class-ref scheme="cpc">H04L69/16</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/326" definition-exists="true" ipc-concordant="H04L69/326" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/326</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the transport layer [OSI layer 4] </text><reference><text><class-ref scheme="cpc">H04L69/16</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/327" definition-exists="true" ipc-concordant="H04L69/327" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/327</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the session layer [OSI layer 5]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/328" definition-exists="true" ipc-concordant="H04L69/328" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/328</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the presentation layer [OSI layer 6]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04L69/329" definition-exists="true" ipc-concordant="H04L69/329" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/329</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in the application layer [OSI layer 7]</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04L69/40" definition-exists="true" ipc-concordant="H04L69/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L69/40</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection </text><reference><text>management of faults, events, alarms or notifications in data switching networks <class-ref scheme="cpc">H04L41/06</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L101/00" definition-exists="true" ipc-concordant="H04L101/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Indexing scheme associated with group <class-ref scheme="cpc">H04L61/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L101/30" definition-exists="false" ipc-concordant="H04L101/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/30</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Types of network names</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/32" definition-exists="false" ipc-concordant="H04L101/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/32</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing non-Latin characters, e.g. Chinese domain names</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/33" definition-exists="false" ipc-concordant="H04L101/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/33</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing protocol addresses or telephone numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/345" definition-exists="false" ipc-concordant="H04L101/345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/345</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing wildcard characters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/35" definition-exists="false" ipc-concordant="H04L101/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/35</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing special prefixes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/355" definition-exists="false" ipc-concordant="H04L101/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/355</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>containing special suffixes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/365" definition-exists="false" ipc-concordant="H04L101/365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/365</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Application layer names, e.g. buddy names, unstructured names chosen by a user or home appliance name</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/37" definition-exists="false" ipc-concordant="H04L101/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/37</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>E-mail addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/375" definition-exists="false" ipc-concordant="H04L101/375" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/375</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Access point names [APN]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/38" definition-exists="false" ipc-concordant="H04L101/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/38</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Telephone uniform resource identifier [URI]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/385" definition-exists="false" ipc-concordant="H04L101/385" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/385</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Uniform resource identifier for session initiation protocol [SIP URI]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/39" definition-exists="false" ipc-concordant="H04L101/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/39</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Globally routable user-agent uniform resource identifier [GRUU] for the session initiation protocol [SIP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/395" definition-exists="false" ipc-concordant="H04L101/395" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/395</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Internet protocol multimedia private identity [IMPI]</text></title-part><title-part><text>Internet protocol multimedia public identity [IMPU]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L101/60" definition-exists="false" ipc-concordant="H04L101/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/60</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Types of network addresses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/604" definition-exists="false" ipc-concordant="H04L101/604" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/604</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Address structures or formats</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/618" definition-exists="false" ipc-concordant="H04L101/618" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/618</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Details of network addresses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/622" definition-exists="false" ipc-concordant="H04L101/622" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/622</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Layer-2 addresses, e.g. medium access control [MAC] addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/627" definition-exists="false" ipc-concordant="H04L101/627" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/627</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Controller area network [CAN] identifiers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/631" definition-exists="false" ipc-concordant="H04L101/631" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/631</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Small computer system interface [SCSI] addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/636" definition-exists="false" ipc-concordant="H04L101/636" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/636</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>IEEE1394 identification numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/64" definition-exists="false" ipc-concordant="H04L101/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/64</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Asynchronous transfer mode [ATM] addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/645" definition-exists="false" ipc-concordant="H04L101/645" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/645</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Fibre channel identifiers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/65" definition-exists="false" ipc-concordant="H04L101/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/65</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Telephone numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/654" definition-exists="false" ipc-concordant="H04L101/654" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/654</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>International mobile subscriber identity [IMSI] numbers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/659" definition-exists="false" ipc-concordant="H04L101/659" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/659</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Internet protocol version 6 [IPv6] addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04L101/663" definition-exists="false" ipc-concordant="H04L101/663" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/663</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/668" definition-exists="false" ipc-concordant="H04L101/668" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/668</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Internet protocol [IP] address subnets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/672" definition-exists="false" ipc-concordant="H04L101/672" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/672</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Short addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/677" definition-exists="false" ipc-concordant="H04L101/677" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/677</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Multiple interfaces, e.g. multihomed nodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/681" definition-exists="false" ipc-concordant="H04L101/681" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/681</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using addresses for wireless personal area networks or wireless sensor networks, e.g. Zigbee addresses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/686" definition-exists="false" ipc-concordant="H04L101/686" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/686</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using dual-stack hosts, e.g. in Internet protocol version 4 [IPv4]/Internet protocol version 6 [IPv6] networks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/69" definition-exists="false" ipc-concordant="H04L101/69" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/69</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using geographic information, e.g. room number</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L101/695" definition-exists="false" ipc-concordant="H04L101/695" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H04L2101/695</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>using masks or ranges of addresses</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H04L201/00" date-revised="2013-01-01" status="published"><classification-symbol>H04L2201/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Algorithms used for the adjustment of time-domain equalizers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2201/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>minimizing an error signal, e.g. least squares, minimum square error</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L201/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2201/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>zero-forcing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L201/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2201/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using the output of a maximum likelihood decoder (Viterbi detector)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L201/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04L2201/08</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Algorithms not covered by groups <class-ref scheme="cpc">H04L2201/02</class-ref> - <class-ref scheme="cpc">H04L2201/06</class-ref></text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L203/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2203/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Characteristics of phase shift key signals</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L203/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2203/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>differential</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L203/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2203/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>continuous phase</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L209/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/00</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication <class-ref scheme="cpc">H04L9/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/04</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Masking or blinding</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/043" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/043</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>of tables, e.g. lookup, substitution or mapping</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/046</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>of operations, operands or results of the operations</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/08</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Randomization, e.g. dummy operations or using noise</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/12</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Details relating to cryptographic hardware or logic circuitry</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/122" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/122</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Hardware reduction or efficient architectures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/125</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/127" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/127</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Trusted platform modules [TPM]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/16</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Obfuscation or hiding, e.g. involving white box</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/20</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Manipulating the length of blocks of bits, e.g. padding or block truncation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/24</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Key scheduling, i.e. generating round keys or sub-keys for block encryption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/26</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Testing cryptographic entity, e.g. testing integrity of encryption key or encryption algorithm</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/30</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Compression, e.g. Merkle-Damgard construction</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/34</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Encoding or coding, e.g. Huffman coding or error correction</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/42</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Anonymization, e.g. involving pseudonyms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/46</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Secure multiparty computation, e.g. millionaire problem</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/463" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/463</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Electronic voting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/466" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/466</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Electronic auction</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/50</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Oblivious transfer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/56</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Financial cryptography, e.g. electronic payment or e-cash</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/60</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Digital content management, e.g. content distribution</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/601" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/601</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Broadcast encryption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/603" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/603</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Digital right managament [DRM]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/605" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/605</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Copy protection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/606" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/606</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Traitor tracing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/608" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/608</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Watermarking</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/64" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/64</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Self-signed certificates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/68" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/68</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Special signature format, e.g. XML format</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/72</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Signcrypting, i.e. digital signing and encrypting simultaneously</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/76" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/76</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Proxy, i.e. using intermediary entity to perform cryptographic operations </text><reference><text>network architectures or network communication protocols using hop-by-hop encryption <class-ref scheme="cpc">H04L63/0464</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/80</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Wireless </text><reference><text>network architectures or network communication protocols for wireless network security <class-ref scheme="cpc">H04W12/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04L209/805" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/805</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/84" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/84</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Vehicles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L209/88" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H04L2209/88</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Medical equipments</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L212/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04L2212/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Encapsulation of packets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04L463/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Additional details relating to network architectures or network communication protocols for network security covered by <class-ref scheme="cpc">H04L63/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using an encryption or decryption engine integrated in transmitted data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying further key derivation, e.g. deriving traffic keys from a pair-wise master key </text><reference><text>cryptographic mechanisms or cryptographic arrangements for generation of secret information including derivation or calculation of cryptographic keys or passwords <class-ref scheme="cpc">H04L9/0861</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying encryption of the keys </text><reference><text>cryptographic mechanisms or cryptographic arrangements for key distribution using key encryption key <class-ref scheme="cpc">H04L9/0822</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/081" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying self-generating credentials, e.g. instead of receiving credentials from an authority or from another peer, the credentials are generated at the entity itself </text><reference><text>cryptographic mechanisms or cryptographic arrangements for generation of secret information including derivation or calculation of cryptographic keys or passwords <class-ref scheme="cpc">H04L9/0861</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/082" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying multi-factor authentication </text><reference><text>cryptographic mechanisms or cryptographic arrangements including means for verifying the identity or authority of a user of the system or for message authentication <class-ref scheme="cpc">H04L9/32</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/101" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying security measures for digital rights management </text><reference><text>data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce <class-ref scheme="cpc">G06Q30/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/102" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying security measure for e-commerce </text><reference><text>data processing systems or methods, specially adapted for e-commerce <class-ref scheme="cpc">G06Q30/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/103" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applying security measure for protecting copy right </text><reference><text>protecting software against unauthorised usage in a vending or licensing environment, e.g. protection the software providers copyright <class-ref scheme="cpc">G06F21/10</class-ref>; data processing systems or methods, specially adapted for payment schemes, architectures or protocols <class-ref scheme="cpc">G06Q20/00</class-ref>; secrecy systems or subscription systems <class-ref scheme="cpc">H04N7/16</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timestamp </text><reference><text>cryptographic mechanisms or cryptographic arrangements involving time stamps <class-ref scheme="cpc">H04L9/3297</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/141" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Denial of service attacks against endpoints in a network</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/142" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Denial of service attacks against network infrastructure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/143" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Denial of service attacks involving systematic or selective dropping of packets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/144" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection or countermeasures against botnets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/145" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection or countermeasures against cache poisoning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04L463/146" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04L2463/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tracing the source of attacks</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme> |