内容发布更新时间 : 2024/5/20 16:33:49星期一 下面是文章的全部内容请认真阅读。

0.1 控制面和用户面协议栈 ............................................................................................................... 2 0.2 S1接口控制面和用户面协议栈 ................................................................................................... 3 1 开机附着流程 ...................................................................................................................................... 4 1.1正常流程 ........................................................................................................................................ 4 1.2异常流程 ........................................................................................................................................ 5 1.2.1 RRC连接建立失败 ................................................................................................................ 5 1.2.2核心网拒绝 ............................................................................................................................. 6 1.2.3 eNB未等到Initial context setup request消息 ....................................................................... 7 1.2.4 RRC重配消息丢失或者没收到RRC重配完成消息或者eNB内部配置UE的安全参数等失败 .................................................................................................................................................. 7

2 UE发起的SERVICE REQUEST流程 ............................................................................................. 8 2.1正常流程 ........................................................................................................................................ 8 2.2异常流程 ........................................................................................................................................ 9 2.2.1 RRC连接建立失败 ................................................................................................................ 9 2.2.2核心网拒绝 ........................................................................................................................... 10 2.2.3 eNB未等到Initial context setup request消息 ..................................................................... 10 2.2.4 RRC重配消息丢失或者eNB内部配置UE的安全参数失败或者没有建立起来一个非GBR承载 ....................................................................................................................................... 10 2.2.5 eNB建立专用承载失败 ....................................................................................................... 10 2.2.6 eNB建立默认承载失败 ....................................................................................................... 11 3网络发起的PAGING流程 ............................................................................................................... 12 3.1 S_TMSI寻呼 ............................................................................................................................... 12 3.2 IMSI寻呼 ..................................................................................................................................... 12 4 TAU流程： ........................................................................................................................................ 12 4.1正常流程 ...................................................................................................................................... 12 4.1.1 IDLE下发起的 ..................................................................................................................... 12 4.1.2 CONNECTED下发起的 ...................................................................................................... 14 4.2异常流程 ...................................................................................................................................... 14 5去附着 ................................................................................................................................................. 14 5.1 关机去附着 ................................................................................................................................. 14 5.2 非关机去附着 ............................................................................................................................. 14 6切换流程 ............................................................................................................................................. 16 7专用承载建立流程 ............................................................................................................................. 16 7.1正常流程 ...................................................................................................................................... 16 7.2异常流程 ...................................................................................................................................... 17 7.2.1 核心网拒绝 .......................................................................................................................... 17 7.2.2 eNB本地建立失败（核心网主动发起的建立） ............................................................... 17 7.2.3 eNB未等到RRC重配完成消息，回复失败 ...................................................................... 18

7.2.4 UE NAS层拒绝 .................................................................................................................... 18 7.2.5 上行直传NAS消息丢失 ..................................................................................................... 19 8专用承载修改流程 ............................................................................................................................. 20 8.1正常流程 ...................................................................................................................................... 20 8.1.1 修改QoS .............................................................................................................................. 20 8.1.2 不修改QoS，只修改TFT .................................................................................................. 20 8.2异常流程 ...................................................................................................................................... 21 8.2.1 核心网拒绝 .......................................................................................................................... 21 8.2.2 eNB回复失败 ....................................................................................................................... 21 8.2.3 UE NAS层拒绝 .................................................................................................................... 21 8.2.4 上行直传NAS消息丢失 同7.2.5. ................................................................................... 21 9专用承载释放流程 ............................................................................................................................. 21 10 基于X2接口的切换 ................................................................................................................. 22 10.1 正常流程 ............................................................................................................................... 22 10.2 异常流程 ............................................................................................................................... 23 11 基于S1接口的切换 ................................................................................................................. 23 0.1 控制面和用户面协议栈 NAS RRC PDCP RLC MAC L1 UE LTE-Uu NAS Relay RRC PDCP RLC MAC L1 eNodeB S1-AP SCTP IP L2 L1 S1-MME S1-AP SCTP IP L2 L1 MME 控制面协议栈 Application IP PDCP Relay PDCP RLC MAC L1 LTE-Uu RLC MAC L1 GTP-U UDP/IP L2 L1 S1-U Relay GTP-U UDP/IP L2 L1 GTP-U UDP/IP L2 L1 S5/S8a UDP/IP L2 L1 SGi IP GTP-U UE eNodeB Serving GW PDN GW

用户面协议

0.2 S1接口控制面和用户面协议栈

Radio Network Layer Transport Network Layer Control Plane S1-AP Radio Network Layer User Plane SCTP IP Data link layer Physical layer TransportNetworkLayer GTP-U UDP IP Data link layer Physical layer S1-MME S1-U