Question: In a Mission Critical (MC) service scenario with multiple active MBMS bearers in the same service area, what is the recommended method for announcing additional MBMS bearers to the MC service client?
Option 1: Always use a unicast bearer for all MBMS bearer announcements to ensure interactive feedback.
Option 2: Utilize a dedicated MBMS bearer with standard QoS settings for both application control signaling and media transfer.
Option 3: Employ a combination of unicast bearers for initial announcement and MBMS bearers for subsequent updates.
Option 4: Use an MBMS bearer specifically designated for application level control signalling, with tailored QoS settings to minimize packet loss.
Explanation: In scenarios where multiple MBMS bearers are active, using a dedicated MBMS bearer for application control signaling (with QoS optimized for low packet loss) is more efficient for announcing additional bearers. This approach ensures reliable transmission of critical signaling messages without unnecessarily occupying unicast resources or compromising on the quality of media transfer over other MBMS bearers.