Question: In a session-based messaging conference involving multiple UEs, what is the primary role of an MRFC (Media Resource Function Controller) or an IMS AS (Application Server)?
Option 1: To establish direct media connections between all participating UEs.
Option 2: To control media resources and distribute messages to all or some conference participants.
Option 3: To manage the signaling plane only, without involvement in the user plane.
Option 4: To act solely as a gateway for external services, not handling conference media or messaging.
Explanation: In the context of session-based messaging conferences with multiple UEs, an MRFC or an IMS AS plays a crucial role in controlling the media resources. This involves receiving messages from conference participants and distributing them to either all or a subset of the participants, as dictated by the conference settings or policies. This functionality is essential for managing multiparty chats efficiently within the IMS framework.