.CauseCause IE 表示S1AP 协议的特定事件的原因。IE/Group NamePresenceRangeIE Type and ReferenceSemantics DescriptionCHOICE Cause GroupMRadio Network LayerRadio Network Layer Cause MENUMERATED(Unspecified,TX2RELOCOverall Expiry, Successful Handover,Release due to E-UTRAN Generated Reason, Handover Cancelled, Partial Handover, Handover Failure In Target EPC/eNB Or Target System,Handover Target not allowed,TS1RELOCoverall Expiry,TS1RELOCprep Expiry,Ce
