IPC Main Group
H04L 45/00 Routing or path finding of packets in data switching networks
Introduced: January 2022
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
Filing statistics
IPC H04L 45/00 belongs to the parent subclass H04L, which recorded 1,397,397 patent applications worldwide between 2013 and 2023. Annual filings grew from 91,584 in 2013 to 136,803 in 2023 (+49%), peaking at 147,432 applications in 2022. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).
Source: EPO PATSTAT, worldwide filings
Additional Content
Communication routing or communication path finding in wireless communication networks
21 direct subcodes
Child Classifications
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- H04L 45/02 Topology update or discovery
- H04L 45/12 Shortest path evaluation
- H04L 45/16 Multipoint routing
- H04L 45/17 Shortcut routing, e.g. using next hop resolution protocol [NHRP]
- H04L 45/18 Loop-free operations
- H04L 45/24 Multipath
- H04L 45/28 using route fault recovery
- H04L 45/3 Routing of multiclass traffic
- H04L 45/302 Route determination based on requested QoS
- H04L 45/42 Centralised routing
- H04L 45/44 Distributed routing
- H04L 45/48 Routing tree calculation
- H04L 45/5 using label swapping, e.g. multi-protocol label switch [MPLS]
- H04L 45/52 Multiprotocol routers
- H04L 45/58 Association of routers
- H04L 45/6 Router architectures
- H04L 45/64 using an overlay routing layer
- H04L 45/645 Splitting route computation layer and forwarding layer, e.g. routing according to path computational element [PCE] or based on OpenFlow functionality
- H04L 45/74 Address processing for routing
- H04L 45/76 Routing in software-defined topologies, e.g. routing between virtual machines
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327