Question: In a TDD/FDD handover scenario, what is the maximum allowed interruption time (Tinterrupt) if the target cell is unknown to the UE and all other conditions are as specified in the standard?
Option 1: Less than 200 ms
Option 2: Less than 250 ms
Option 3: Less than 300 ms
Option 4: Less than 10 + 40 + 50*0 + 150*1 = 200 ms
Explanation: According to the specifications, for an unknown target cell with a known indication in the handover command not applying, and considering Toffset=10 ms, the interruption time Tinterrupt is calculated as: Toffset + 40 + 50*KC + 150*UC = 10 + 40 + 50*0 + 150*1 = 200 ms. Thus, the maximum allowed interruption time in this scenario is less than 200 ms.