Question: In a GPRS network, what happens to the SGSN's Mobility Management (MM) context for a Mobile Station (MS: User Equipment) when it is in the READY state and no data is being communicated, but the READY timer has not yet expired?
Option 1: The MM context transitions to the IDLE state immediately.
Option 2: The MM context remains in the READY state regardless of data communication.
Option 3: The network initiates GPRS paging to verify the MS's location.
Option 4: The SGSN transfers the MM context to another BSS for optimization.
Explanation: In the READY state, the MM context remains unchanged in the SGSN even if there is no ongoing data communication between the network and the MS, as long as the READY timer has not expired. This allows for quick re-establishment of data sessions without requiring location updates or detach procedures.