Study on system architecture enhancement for next generation real time communication
The scope of this document is to study IMS architecture enhancements to support new real time communication services based on requirements of e.g. eMMTEL and 5G_MEDIA_MTSI_ext.
The study in this document includes the following aspects:
1) Study the enhancement of IMS architecture and procedures to support Data Channel usage in IMS network, including whether and which functionalities are defined in IMS architecture for Data Channel server, with separate control plane and media plane, and Data Channel application repository, which procedures are needed between Data channel server and IMS AS to support call event notifications.
2) Study whether and how IMS architecture and functions are supported for the requirements from SA WG1 Rel-18 eMMTEL WID impacts:
- to support AR telephony communication.
- to support 3rd party to verify via operator network that the caller is authorized to use or reference specific identity information which can be securely signalled to the callee when placing a call.
3) Study whether and which IMS media control interfaces can be potentially applied for service based architecture, supporting both existing capabilities and new capabilities for possible new applications and efficient media processing.