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ETSI TS 129 280
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ETSI TS 129 280 Universal Mobile Telecommunications System (UMTS); LTE; Evolved Packet System (EPS); 3GPP Sv interface (MME to MSC, and SGSN to MSC) for SRVCC (3GPP TS 29.280 version 14.0.0 Release 14)
standard by European Telecommunications Standards Institute, 04/01/2017
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ETSI TS 129 280 describes the Sv interface between the Mobility Management Entity (MME) or Serving GPRSSupport Node (SGSN) and 3GPP MSC server enhanced for SRVCC. Sv interface is used to support Inter-RAThandover from IMS based voice service over EPS to CS domain over 3GPP UTRAN/GERAN access or from UTRAN(HSPA) to 3GPP UTRAN/GERAN access and to support Inter-RAT handover from IMS based voice and video serviceover EPS to CS domain over 3GPP UTRAN access. Sv interface is also used to support Inter-RAT handover from voiceservice in CS domain over 3GPP UTRAN/GERAN access to IMS based service over LTE or UTRAN (HSPA).If there is no specific indication, the term "MSC server" denotes 3GPP MSC server enhanced for SRVCC or 3GPPMSC server enhanced for vSRVCC as defined in 3GPP TS 23.216 [2].