4.20 Support of IMS Service Centralization and Continuity

23.2283GPPIP Multimedia Subsystem (IMS)Release 18Stage 2TS

IMS Service Centralization, defined in TS 23.292 [66] provides communication services such that all services, and service control, are based on IMS mechanisms and enablers. It enables IMS services when using CS access as bearer for the media.

IMS Service Continuity, defined in TS 23.237 [67] provides Session Transfer mechanisms to maintain service continuity in the event of access transfer for the case when such events are not hidden from the IMS session layer and thus service continuity could not otherwise be maintained.

All functionalities and reference points are defined in TS 23.292 [66] and TS 23.237 [67].