Question: In UTRAN TDD mode, what is the maximum allowed handover delay when a UE has already synchronized with the target GSM cell before receiving the HANDOVER FROM UTRAN COMMAND?
Option 1: Less than 90 ms
Option 2: Less than 200 ms
Option 3: Less than 500 ms
Option 4: Less than 1 second
Explanation: This answer reflects the specified maximum handover delay for scenarios where the UE is pre-synchronized with the target GSM cell, ensuring minimal service interruption. This requirement is crucial for maintaining seamless user experience during handovers, highlighting the importance of efficient radio resource management in telecom networks.