1天堂的爱：Attach
2：Sevice Request
商务英语
3：Extended Service Request
4：Paging
a)Paging for EPS rvices through E-UTRAN using S-TMSI
b)
c)Paging for EPS rvices through E-UTRAN using IMSI
凉菜的做法d)
e)Paging for CS fallback to A/Gb or Iu mode
f)
5：TAU
关于篮球的游戏6：Detach
7：PDN Connectivity
8：PDN Disconnection
9：EPS bearer resource allocation
10：属相年份表EPS bearer resource modify
11：EPS bearer context deactivation防诈骗班会
12：EPS bearer context modification
13：Dedicated EPS bearer context activation
14：X2 handover
15：S1 handover in
说明：切换失败时只包括上图中的第一条和第三条消息，切换成功时除了包含第一、第二条，还包含下图中的消息。
16：S1 handover out
17：S1 handover cancel
18：Intial Context Setup
eNB
MME
[S1AP] Initial Context Setup Request
[S1AP] Intial Context Setup Respon
19：UE Context Modification
20：UE Context Relea
民族团结标语现代诗人有哪些a)S1 UE Context Relea (EPC triggered)
