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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 Overview of WebRTC access to IMS
  • 5 Functional entities
  • 5A Data transport
  • 5B Data framing and securing
  • 5C Data formats
  • 5D Connection management
  • 5E Presentation and control
  • 5F Local system support functions
  • 6 Registration and authentication
  • 6A Deregistration
  • 7 Call origination and termination
  • 8 Data channel open and close
  • 9 Call modification
  • 10 IP multimedia application support in the IM CN subsystem using webRTC
  • A.1 Scope of signalling flows
  • A.2 Void
  • A.3 Signalling flows for registration
  • A.4 Void
  • A.5 Void

A.1 Scope of signalling flows

24.3713GPPProtocol specificationRelease 17Stage 3TSWeb Real-Time Communications (WebRTC) access to the IP Multimedia (IM) Core Network (CN) subsystem (IMS)

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

This annex gives examples of signalling flows for IMS based WebRTC, and the W2 interface is based on SIP protocol.