A Global

The Mobile

CT WG4 - Core Network Protocols

Within the 3GPP Technical Specification Group Core Network and Terminals, the main objectives of the 3GPP TSG CT WG4 (CT4) are to specify the protocols within the Core Network and prepare the specifications describing the protocol requirements in the area of:

  • Numbering, Addressing and Identification
  • Access and mobility management
  • Session management
  • Subscription data management
  • Subscriber authentication
  • SMS services
  • Location services
  • Data management and Repository
  • Network slice selection services
  • NF registration and discovery services
  • DNS procedures within 3GPP
  • Separation between Control Plane and the User Plane function
  • Restoration
  • Interconnection between PLMNs

 CT4 is currently tasked to design and specify the protocols for the HTTP-based APIs used to access services offered by the network functions to other network functions in the areas listed above within the service-based architecture defined for the 5G core network.

Terms of Reference 

The latest terms of reference were appoved at CT#90-e in document CP-203097

Useful links and information

About CT WG4 List of elected officials
Documents Meeting documents
  Work items
Meetings Next meeting information & previous meeting reports and documents
  Liaisons Statements
  Full CT WG4 meeting calendar
General info 3GPP IETF Dependencies - from TSG#52 Jun 2011 onwards the 3GPP-IETF Dependencies are included in the 3GPP Work Plan
  Email exploder lists


CT Working groups 
TSG CT Plenary  
TSG CT WG1 User Equipment - Core Network protocols
[No WG2] See Old Terminals Group 2
TSG CT WG3 Interworking with External Networks & Policy and Charging Control
TSG CT WG4 Core Network Protocols
TSG CT WG5 OSA (Now transferred to OMA)
TSG CT WG6 Smart Card Application Aspects
More News:
News Feeds