Question: What is the primary purpose of using an Area Session ID in conjunction with an MBS Session ID (e.g., TMGI or Source Specific IP Multicast address) for 5G multicast-broadcast services?
Option 1: To enable load balancing across different MB-UPFs within the same MBS Service Area.
Option 2: To differentiate between location-dependent and location-independent MBS content within a single MBS session.
Option 3: To facilitate seamless handover for UE moving between different MBS Service Areas with the same MBS Session ID.
Option 4: To uniquely identify an MBS session in a specific MBS Service Area, allowing for multiple instances of the same MBS Session ID across different areas.
Explanation: Combining an Area Session ID with an MBS Session ID ensures each MBS session within a specific geographic area (MBS Service Area) can be uniquely identified, crucial for location-dependent content where the same MBS Session ID might be used in different areas but with distinct Area Session IDs.