Question: Which of the following best describes when the Radio Link Restoration procedure can be initiated by the DRNC in a UTRAN?
Option 1: Immediately before establishing a new Radio Link on the Uu interface for a UE
Option 2: Only after a UE Context has been successfully released
Option 3: During the initial setup of the signalling bearer connection for a UE
Option 4: At any time after a Radio Link has been established for a UE
Explanation: The DRNC can initiate the Radio Link Restoration procedure at its discretion once a foundational requirement (establishing a Radio Link) is met, allowing for dynamic management of radio resources and synchronization on the Uu interface without specific timing constraints.