Question: What happens when a PLAY request is received for an ongoing Session Progress (SP) session, according to 3GPP specifications for Transparent end-to-end Packet-switched Streaming Service (PSS)?
Option 1: The server buffers the new PLAY request until the current session completes.
Option 2: The server ignores the new PLAY request to prevent session overlap.
Option 3: The server immediately executes the new PLAY request and terminates the ongoing one.
Option 4: The server sends a notification to the client for manual resolution of the conflict.
Explanation: This is because, as per the specified behavior for SP sessions in PSS, when a new PLAY request is received while an existing session is in progress, the server is mandated to immediately initiate the new playback and cease the ongoing one. This ensures seamless transition between playback requests without requiring additional client intervention or introducing buffering delays.