Question: How is a Temporary Mobile Group Identity (TMGI) typically conveyed to a User Equipment (UE) for Multicast MBMS (Multimedia Broadcast/Multicast Service) bearer services?
Option 1: Via the MBMS Multicast Service Activation procedure
Option 2: Through a dedicated point-to-point SMS message from the BM-SC (Broadcast Multicast Service Centre)
Option 3: Embedded within the MBMS service's audio/video stream
Option 4: As part of the initial UE network attachment procedure
Explanation: For efficient resource utilization and targeted service delivery, Multicast MBMS bearer services rely on the MBMS Multicast Service Activation procedure to inform UEs about relevant services. This procedure is designed for this purpose, making it the most appropriate method for conveying the TMGI to interested UEs, thereby enabling them to join or leave multicast groups efficiently.