8.9 MBMS UE Context Synchronisation Procedure

23.2463GPPArchitecture and functional descriptionMultimedia Broadcast/Multicast Service (MBMS)Release 17TS

The Routing Area Update procedure transfers the MBMS UE Context status between UE and SGSN. This MBMS UE Context status identifies MBMS UE contexts, which are lost or deactivated only on one side. All MBMS UE Contexts, which are active on one side only shall be deactivated locally. If the UE wishes to re-activate the related MBMS bearer service, it shall join the MBMS bearer service again. See clause 8.2 "MBMS Multicast Service Activation".

Figure 13d. MBMS UE Context Synchronisation procedure

1) The UE sends Routeing Area Update Request to the SGSN. It includes the MBMS UE Context status, which indicates the UE’s active MBMS UE Contexts.

2) The SGSN sends Routeing Area Update Accept to the UE. It includes the MBMS UE Context status, which indicates the UE’s MBMS UE Contexts that are stored in the SGSN.