Question: Under what condition can the CRNC initiate the Radio Link Deletion procedure towards a Node B in a UTRAN network?
Option 1: Only during handover procedures to ensure seamless connectivity.
Option 2: Exclusively when the UE is in idle mode to conserve resources.
Option 3: Whenever a new radio link is established to manage resource allocation.
Option 4: At any time, as long as the Node B Communication Context exists.
Explanation: The correct answer is Option 4 because the Radio Link Deletion procedure can be initiated by the CRNC at any moment, provided that a Node B Communication Context is established. This allows for dynamic resource management based on network conditions or UE activity, without being limited to specific procedures or dependent on the UE's activity state. The existence of the Node B Communication Context is the key prerequisite.