T-SgNBS-SgNBT-SgNBS-SgNBS-GWS-GW1、MeasurementReport2、HandoverRequest3、HandoverRequestAck5、SNStatusTransfer6、RRCConnectionReconfigurationComplete4、RRCConnectionReconfiguration7、PathSwitchRequest9、UserPlaneupdateRequestresponse11、UEContextReleaseMMEMME8、UserPlaneupdateRequest10、PathSwitchRequestAckT-SgNBS-SgNBT-SgNBS-SgNBMMEMME1、HandoverRequest2、SgNBAddRequest3、SgNBAddRequestAck5a、SgNBReleaseReques8、RRCConnectionReconfigurationComplete4、HandoverRequestAcknowledge12、SNStatusTransfer11a、SecondaryRATDataUsageReport18、UEContextReleaseS-GWS-GW10、SgNBReconfigurationComplete13、DATAAcknowledgeT-MNT-MNS-MNS-MN5b、SgNBReleaseRequesAcknowledge6、RRCConnectionReconfiguration7、RandomAccessProdedure9、RandomAccessProdedure11b、SecondaryRATReport14、PathSwitchRequest15、BearerModification17、PathSwitchRequestAck16a、NewsPath16b、NewsPath19、UEContextRelease