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ETSI TS 123 237
M00002783
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ETSI TS 123 237 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) Service Continuity; Stage 2 (3GPP TS 23.237 version 14.2.0 Release 14)
standard by European Telecommunications Standards Institute, 05/01/2017
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ETSI TS 123 237 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: Access Transfer related functionality: PS-CS Access Transfer; PS-PS Access Transfer; PS-PS Access Transfer in conjunction with PS-CS Access Transfer; Adding and/or removing media flows to support service; MSC Server assisted mid-call feature; SRVCC session transfer of IMS emergency session. Inter-UE Transfer related functionality: Establishment and release of a Collaborative Session; Addition of media flows to, modification of media flows in, and release of media flows from a CollaborativeSession; Transfer of media flows from one UE to another; Transfer of the Collaborative Session Control with or without transfer of media flows; Transfer of all media flows to a target UE without establishing a Collaborative Session; Session discovery; Inter-UE Transfer initiated by the target UE or by the SCC AS; Replication of media flows by means of Inter-UE Transfer procedures; Authorization and other aspects to support Inter-UE Transfer across multiple IMS subscriptions.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.