Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) Service Continuity; Stage 2 (V8.7.0; 3GPP TS 23.237 version 8.7.0 Release 8)
The present document specifies the architectural requirements and procedures for delivery of IMS Service Continuity. TS 23.206 [3] is migrated to this specification. The scope of the specification includes: - PS-CS service continuity using IMS Centralized Services (see TS 23.292 [5]); - PS-PS service continuity; - PS-PS service continuity in conjunction with PS-CS service continuity; - Adding and/or removing media flows to support service. The solution is restricted to service continuity using IMS procedures@ i.e. mobility mechanisms on the IP-CAN level are not within the scope of this specification.