Study on system architecture for next generation real time communication services; Phase 2
Editor's note: This clause will describe the scope for this study item.
This technical report studies further enhancements to the IMS network architecture, interfaces and procedures to support the next generation real time communication services requirements on the following aspects:
1. Study on the enhancements to framework for exposure of IMS capability in the context of IMS data channel session, including:
- enhancing the IMS architecture to define an event subscription mechanism to enable subscription to various IMS events of IMS data channel services;
- how to enhance NF services of IMS and 5GC to expose existing IMS services (e.g. IMS voice/video call, message) in the context of an IMS data channel session, i.e. when DC is established.
2. Study how to provide IMS data channel applications to the subscriber who is using a MTSI UE where it is appropriate depending on the applications.
3. Study how IMS architecture and procedures are enhanced to support verified OIP service for 3rd party in IMS session using SA WG3 work on third party identity authentication as basis.
4. Study on the enhancements to IMS data channel related services and operational aspects, including:
- whether and how to support standalone IMS data channel without accompanying audio/video/messaging media in an IMS session;
- how to support 3GPP PS Data Off for IMS data channel and applications over IMS data channel;
- study enhancements of IMS DC architecture and procedure to support multiplexing a SCTP connection for multiple DC applications.
5. Study whether and how to enhance IMS architecture, procedures, interfaces for supporting avatar call (including multi-party communication) and communication with accessibility as specified in clause 5.2.2 of TS 22.156 [9].