Question: In an MCPTT (Mission Critical Push To Talk) scenario, what is the primary purpose of the 'P: Releasing' state at the floor participant interface towards the MCPTT client?
Option 1: To initiate a new group communication session with updated participant lists.
Option 2: To finalize the release of an ongoing session or remove the MCPTT client from it, awaiting application and signalling plane confirmation.
Option 3: To handle incoming LMR (Land Mobile Radio) system communications during a session pause.
Option 4: To manage priority levels among multiple simultaneous MCPTT sessions.
Explanation: The 'P: Releasing' state is specifically used while awaiting the completion of session release or the removal of an MCPTT client from a session, finalizing necessary application and signalling plane operations for a structured teardown of resources. This state's primary purpose is not to initiate new sessions, handle incoming LMR communications during pauses, or manage priority levels among sessions, but rather to gracefully conclude an existing session's participation.