Question: In UTRAN Iub interface, what triggers the activation timing when Fast Reconfiguration Mode is utilized by the SRNC (Serving Radio Network Controller)?
Option 1: When the UE (User Equipment) is detected on the new configuration
Option 2: Upon receipt of the Fast Reconfiguration Mode IE at Node B
Option 3: Immediately after the SRNC sends the reconfiguration command
Option 4: When all UEs in the cell confirm successful reconfiguration
Explanation: In the context of UTRAN's Iub interface, Fast Reconfiguration Mode is a mechanism that allows for efficient adjustments to be made. Specifically, when this mode is activated by the SRNC, the timing for the reconfiguration is contingent upon the detection of the UE on the new configuration. This approach ensures that the reconfiguration process is synchronized with the UE's transition to the new setup, minimizing potential disruptions or misalignments between the network and the UE's expected state.