控制面切换时延的计算方法是()。
A.从UE发送Measurement report到UE 发送RRC Connection Reconfiguration Complete
B.从ENB 发送Measurement report到ENB发送RRC Connection Reconfiguration Complete
C.从UE发送Measurement report到ENB 发送RRC Connection Reconfiguration
D.从ENB发送Measurement report到UE 发送RRC Connection Reconfiguration