目录 ..................................................................................................................................................3
1. 概述...........................................................................................................................................1
2. 前期准备...................................................................................................................................1
2.1 后台软件的安装及登录....................................................................................................1
2.2 跟踪任务的执行................................................................................................................3
2.2.1 跟踪Uu 接口信令消息.........................................................................................4
2.2.2 跟踪Iub 接口信令消息..........................................................................................4
2.2.3 跟踪Iu 接口信令消息............................................................................................5
2.2.4 跟踪UE（标准接口消息）...................................................................................6
2.2.5 跟踪CDT...................................................................................................................7
2.3 后台信令回顾....................................................................................................................9
3. 信令流程介绍.........................................................................................................................10
3.1 主叫流程..........................................................................................................................10
3.1.1. RRC 连接建立流程.............................................................................................10
3.1.2.初始直接传输/上下行直接传输（含鉴权阶段和安全模式）..........................14
3.1.3 RAB 建立流程.......................................................................................................20
3.1.4 振铃接听...............................................................................................................22
3.2 被叫流程..........................................................................................................................23
3.2.1 寻呼流程...............................................................................................................23
3.2.2 完整被叫信令流程...............................................................................................23
3.3 呼叫释放流程..................................................................................................................25
3.3.1 CN 发起的释放流程.............................................................................................25
3.3.2 UE 发起的释放流程.............................................................................................27
3.4 切换流程.........................................................................................................................28
3.4.1.NodeB 内小区间接力切换....................................................................................28
3.4.2 NodeB 内小区间硬切换........................................................................................32
3.4.3 RNC 内NodeB 间小区接力切换.........................................................................33
3.4.4 RNC 内NodeB 间小区硬切换.............................................................................34
3.4.5 RNC 间硬切换......................................................................................................34
3.5 小区/URA 更新..............................................................................................................36
3.5.1 小区更新流程.....................................................................................................36
3.5.2 URA 更新流程......................................................................................................38
4.常见异常信令.............................................................................................................................39
4.1 呼叫异常信令流程.........................................................................................................39
4.1.1 RRC 连接建立异常流程......................................................................................39
4.1.2 RRC 连接拥塞或无响应.......................................................................................46
4.1.3 RAB 建立异常流程.............................................................................................52
4.1.4 测量控制异常流程..............................................................................................56
4.1.5 安全模式控制异常流程......................................................................................56
4.2 切换异常流程.................................................................................................................57
4.2.1 同RNC 不同NodeB 小区切换异常流程.............................................................57
4.2.2 切换失败问题处理思路.....................................................................................62
TD-SCDMA 后台话统分析指导书
4.2.3 RNC 间硬切换异常流程.......................................................................................62
4.3 更新过程异常流程..........................................................................................................67
4.3.1 小区更新异常流程..............................................................................................67
4.3.2 URA 更新异常流程.............................................................................................67
4.4 无线链路失败分析与处理..............................................................................................67
4.4.1 UE 侧检测无线链路失败.................................................................................67
4.4.2 无线链路失败准则.............................................................................................68
4.4.3 无线链路失败后UE 的行为..............................................................................68
4.4.4 Node B 侧检测无线链路失败...........................................................................68
4.4.5 Radio Link Failure Indication 过程的典型原因...................................68
4.4.6 Radio Link Failure Indication 过程的典型应用.....................................68
4.5 释放原因值.....................................................................................................................69
4.5.1 CN 发起Uu 接口释放........................................................................................69
4.5.2 UE 发起Uu 接口释放........................................................................................69
4.5.3 Uu 接口RRC 连接释放......................................................................................69
4.5.4 Iu 接口释放.......................................................................................................70
5.案例.............................................................................................................................................71
5.1 起呼失败.........................................................................................................................71
5.2 切换问题.........................................................................................................................73