A . 切换过程中，收到源小区发来的RRC CONNECTION RECONFIGURATION，UE在源小区发送RRC CONNECTION SETUP RECONFIGURATION COMPELTE
B . 切换过程中，收到源小区发来的RRC CONNECTIONRECONFIGURATION，UE在目标小区随机接入后并在目标小区上送RRC CONNECTION SETUP RECONFIGURATION COMPELTE
C . 切换过程中，收到源小区发来的RRC CONNECTIONRE CONFIGURATION，UE无需随机接入过程，直接在目标小区上送RRC CONNECTION SETUP RECONFIGURATION COMPELTE
D . 切换过程中，UE在目标随机接入后收到目标小区发来的RRC CONNECTIONRE CONFIGURATION后在目标小区上送RRC CONNECTION SETUP RECONFIGURATIONCOMPELTE