A.S1-APHANDOVERREQUIRED
B.S1-APHANDOVERNOTIFY
C.X2-APHANDOVERREQUEST
D.S1-APPATHSWITCHREQUEST
A.HandoverRequest
B.HandoverRequestAck
C.SNStatusTransfer
D.UEContextRelease
A.RRCconnectionrequest
B.RRCconnectionsetup
C.RRCconnectionreconfiguration
D.RRCconnectionrelease
A.HandoverRequest
B.HandoverRequired
C.HandoverRequestAcknowledge
D.SNStatusTransfer
B、Handover Access(切换接入)
C、PhysicalInformation(物理信息)
D、Handover Complete(切换完成)
A.UE把测量报告发给gNB的源小区
B.gNB的源小区收到MR之后,进行切换判决
C.如果源小区允许切换RRC CONNECT RECONFIG信令
D.UE收到切换命令后,中断与源小区的交互,在目标小区发起随机接入