Question: What triggers the DRNC (Drift RNC) to initiate the Enhanced Relocation Release procedure towards the SRNC (Serving RNC) in a UTRAN network?
Option 1: Successful handover of a User Equipment (UE) from the SRNC to another RNC.
Option 2: Periodic UE context update for resource optimization.
Option 3: Failure of an enhanced relocation process, leading to CN (Core Network) domain resource release.
Option 4: Routine maintenance of RNSAP (Radio Network Subsystem Application Part) signalling connections.
Explanation: The Enhanced Relocation Release procedure is initiated by the DRNC in response to a failure during the enhanced relocation process, necessitating the release of resources allocated in the Core Network domain, signaled to the SRNC, impacting resource management and signaling efficiency within the UTRAN network.