Section: 19.2.2.3 BM-SC in the home PLMN initiated multicast service deactivation
Content: This section defines the BM-SC in the home PLMN initiated multicast service deactivation procedure. Figure 32b: BM-SC in the home PLMN initiated MBMS multicast service deactivation procedure 1. The BM-SC in home PLMN sends an ASR to the BM-SC in visited PLMN, indicating that the UE shall be removed from a specific multicast service. The session to be terminated is uniquely identified by the Diameter session-id. 2. The BM-SC in the visited PLMN sends an ASR to the GGSN indicating that the UE shall be removed from the multicast service. The session to be terminated is uniquely identified by the Diameter session-id. 3. Upon reception of the ASR, the GGSN sends an ASA to the BM-SC in visited PLMN. 4. Upon reception of the ASA, the BM-SC in visited PLMN sends an ASA to the BM-SC in home PLMN. 5. Upon reception of the ASR in step 3, the GGSN sends an MBMS UE Context Deactivation Request to the SGSN. The IP multicast address, APN and IMSI together identify the MBMS UE Context to be deleted by the SGSN. Steps 5 and 6 of Figure 30a in section 19.2.2.1 follows in roaming scenarios where service was provided in the home PLMN. Steps 5 and 6 of Figure 31a in section 19.2.2.2 follows in roaming scenarios where service was provided in the visited PLMN.