题目内容
(请给出正确答案)
[单选题]
LTE向NR切换,LTE会在()信令之后和UE断开连接。
A.Handover Command
B.Relocation Response
C.MobilityFromEutraCommand
D.RRCReconfigurationComplete
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A.Handover Command
B.Relocation Response
C.MobilityFromEutraCommand
D.RRCReconfigurationComplete
B.都需要建立IMS信令面SIP默认承载,5QI=5
C.都需要建立默认承载,5QI=8/9
D.都需要建立IMS用户面语音专用承载,5QI=1
A.SgNBReleaseCommand
B.SgNBReleaseRequest
C.RRCConnectionRequest
D.SgNBModificationRequest