Question: What is the maximum frequency at which an MBMS UE should use the SNTP time synchronization service to maintain +/- 1 second accuracy with the BM-SC, to avoid scalability issues?
Option 1: Once every 10 minutes
Option 2: Once every hour
Option 3: At most once every 24 hours
Option 4: Continuously, as needed by the UE
Explanation: To prevent scalability issues while ensuring the MBMS UE remains time-synchronized with the BM-SC within a +/- 1 second tolerance, the UE is specified to use the SNTP time synchronization service at most once every 24 hours. This approach balances the need for accurate time synchronization with the necessity to avoid overloading the network with frequent synchronization requests.