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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 General
  • 5 Handling of User-to-user signalling
  • 6 Interaction with other supplementary services
  • 7 Interaction with other network features
  • 8 Interworking with other networks
  • 9 Network entity functions
    • 9.1 Originating network processes
    • 9.2 Terminating network processes
    • 9.3 Procedures common in serving and remote networks
    • 9.4 Processes used during Active Call
  • 10 Information stored in the HLR and in the VLR
  • 11 State transition model
  • 12 Handover

1 Scope

23.0873GPPRelease 17Stage 2TSUser-to-User Signalling (UUS) supplementary service

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

The present document gives the stage 2 description of the User-to-User signalling supplementary services.

The User-to-user supplementary service is divided into 3 different services:

– Service 1 (UUS1)

– Service 2 (UUS2)

– Service 3 (UUS3)