Question: Under what condition, apart from reaching the "stop time" in the session schedule or the "time to" value in the SDP, can an MBMS (Multimedia Broadcast/Multicast Service) download session be considered complete by a UE (User Equipment)?
Option 1: When the UE's buffer capacity for the session is fully utilized.
Option 2: When the UE decides to exit the session, indicating no further data from that session will be received.
Option 3: Upon receipt of a new schedule description fragment for a different service.
Option 4: After a predefined inactivity period within the ongoing session.
Explanation: This option is correct because, according to the provided telecom concept, an MBMS download session (and also streaming sessions) can be considered complete not just by reaching scheduled time limits, but also when the User Equipment (UE) chooses to exit the session. This decision to exit implies that the UE will not receive any more data from that particular session, thereby marking its completion from the UE's perspective. This scenario highlights a practical aspect of session management in telecom networks, where user actions can influence the state of ongoing communication sessions.