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IPC Subgroup
H04L 47/1

Flow control; Congestion control

Introduced: January 2022

Full Title

Traffic control in data switching networks > Flow control; Congestion control

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

24 direct subcodes

Child Classifications

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  • H04L 47/11 Identifying congestion
  • H04L 47/17 Interaction among intermediate nodes, e.g. hop by hop
  • H04L 47/2 Traffic policing
  • H04L 47/21 using leaky-bucket
  • H04L 47/215 using token-bucket
  • H04L 47/22 Traffic shaping
  • H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
  • H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
  • H04L 47/3 in combination with information about buffer occupancy at either end or at transit nodes
  • H04L 47/31 by tagging of packets, e.g. using discard eligibility [DE] bits
  • H04L 47/32 by discarding or delaying data units, e.g. packets or frames
  • H04L 47/33 using forward notification
  • H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
  • H04L 47/35 by embedding flow control information in regular packets, e.g. piggybacking
  • H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327