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目     录


第一章 协议层与概念...................................................................................................... 6

1.1           控制面与用户面.......................................................................................... 6

1.2           接口与协议................................................................................................. 7

1.2.1  NAS协议(非接入层协议)..................................................................... 8

1.2.2  RRC层(无线资源控制层)..................................................................... 9

1.2.3  PDCP层(分组数据汇聚协议层)............................................................ 9

1.2.4  RLC层(无线链路控制层).................................................................... 10

1.2.5  MAC层(媒体接入层)......................................................................... 11

1.2.6  PHY层(物理层).................................................................................. 12

1.3           空闲态和连接态......................................................................................... 13

1.4           网络标识................................................................................................... 14

1.5           承载概念................................................................................................... 16

第二章 主要信令流程..................................................................................................... 17

2.1 开机附着流程................................................................................................... 17

2.2随机接入流程.................................................................................................... 20

2.3 UE发起的service request流程....................................................................... 24

2.4寻呼流程........................................................................................................... 27

2.5切换流程........................................................................................................... 28

2.5.1 切换的含义及目的................................................................................... 28

2.5.2 切换发生的过程...................................................................................... 29

2.5.3 站内切换................................................................................................. 29

2.5.4 X2切换流程............................................................................................ 31

2.5.5 S1切换流程............................................................................................ 33

2.5.6 异系统切换简介...................................................................................... 35

2.6 CSFB流程......................................................................................................... 36

2.6.1 CSFB主叫流程........................................................................................ 37

2.6.2 CSFB被叫流程........................................................................................ 38

2.6.3 紧急呼叫流程.......................................................................................... 40

2.7 TAU流程........................................................................................................... 41

2.7.1 空闲态不设置“ACTIVE”的TAU流程................................................... 42

2.7.2 空闲态设置“ACTIVE”的TAU流程....................................................... 44

2.7.3 连接态TAU流程..................................................................................... 46

2.8专用承载流程.................................................................................................... 47

2.8.1 专用承载建立流程................................................................................... 47

2.8.2 专用承载修改流程................................................................................... 49

2.8.3 专用承载释放流程................................................................................... 51

2.9去附着流程........................................................................................................ 53

2.9.1 关机去附着流程...................................................................................... 53

2.9.1 非关机去附着流程................................................................................... 54

2.10 小区搜索、选择和重选................................................................................... 56

2.10.1 小区搜索流程....................................................................................... 56

2.10.1 小区选择流程....................................................................................... 57

2.10.3 小区重选流程....................................................................................... 58

第三章 异常信令流程..................................................................................................... 61

3.1 附着异常流程................................................................................................... 62

3.1.1 RRC连接失败.......................................................................................... 62

3.1.2 核心网拒绝............................................................................................. 63

3.1.3 eNB未等到Initial context setup request消息...................................... 64

3.1.4 RRC重配消息丢失或eNB内部配置UE的安全参数失败......................... 65

3.2 ServiceRequest异常流程................................................................................. 66

3.2.1 核心网拒绝............................................................................................. 66

3.2.2 eNB建立承载失败.................................................................................. 67

3.3 承载异常流程................................................................................................... 69

3.3.1核心网拒绝.............................................................................................. 69

3.3.2 eNB本地建立失败(核心网主动发起的建立)........................................ 69

3.3.3 eNB未等到RRC重配完成消息,回复失败.............................................. 70

3.3.4 UE NAS层拒绝....................................................................................... 71

3.3.5上行直传NAS消息丢失.......................................................................... 72

第四章 系统消息解析..................................................................................................... 73

4.1 系统消息.......................................................................................................... 74

4.2 系统消息解析................................................................................................... 75

4.2.1 MIB (Master Information Block)解析.............................................. 75

4.2.2 SIB1 (System Information Block Type1)解析.................................. 76

4.2.3 SystemInformation消息........................................................................ 78

第五章 信令案例解析..................................................................................................... 84

5.1实测案例流程.................................................................................................... 85

5.2 流程中各信令消息解析..................................................................................... 85

5.2.1 RRC_CONN_REQ:RRC连接请求............................................................. 86

5.2.2 RRC_CONN_SETUP:RRC连接建立......................................................... 87

5.2.3 RRC_CONN_SETUP_CMP:RRC连接建立完成......................................... 91

5.2.4 S1AP_INITIAL_UE_MSG:初始直传消息................................................... 91

5.2.5 S1AP_INITIAL_CONTEXT_SETUP_REQ:初始化文本建立请求.................. 92

5.2.6 RRC_UE_CAP_ENQUIRY:UE能力查询.................................................... 95

5.2.7 RRC_UE_CAP_INFO:UE能力信息........................................................... 96

5.2.8 S1AP_UE_CAPABILITY_INFO_IND:UE能力信息指示............................ 100

5.2.9 RRC_SECUR_MODE_CMD:RRC安全模式命令...................................... 104

5.2.10 RRC_CONN_RECFG:RRC连接重配置................................................. 105

5.2.11 RRC_SECUR_MODE_CMP:RRC安全模式完成.................................... 108

5.2.12 RRC_CONN_RECFG_CMP:RRC连接重配置完成................................. 108

5.2.13 S1AP_INITIAL_CONTEXT_SETUP_RSP:初始化文本建立完成............... 109

5.2.14 S1AP_ERAB_MOD_REQ:ERAB修改请求............................................. 110

5.2.15 RRC_DL_INFO_TRANSF:RRC下行直传消息........................................ 111

5.2.16 S1AP_ERAB_MOD_RSP:ERAB修改完成............................................. 111

5.2.17 RRC_CONN_RECFG:RRC连接重配置................................................. 112

5.2.18 RRC_UL_INFO_TRANSF:RRC上行直传消息........................................ 117

5.2.19 S1AP_UL_NAS_TRANS:上行NAS直传消息........................................ 117

5.2.20 RRC_CONN_RECFG_CMP:RRC连接重配置完成................................. 118

5.2.21 RRC_CONN_RECFG:RRC连接重配置................................................. 118

5.2.22 RRC_CONN_RECFG_CMP:RRC连接重配置完成................................. 120

5.2.23 RRC_MEAS_RPRT:RRC测量报告........................................................ 120

5.2.24 RRC_UL_INFO_TRANSF:RRC上行信息传输........................................ 121

5.2.25 S1AP_UL_NAS_TRANS:上行NAS信息传输........................................ 121

5.2.26 S1AP_UE_CONTEXT_MOD_REQ:UE文本更改请求............................ 122

5.2.27 S1AP_UE_CONTEXT_MOD_RSP:UE文本更改响应............................. 123

5.2.28 RRC_CONN_REL:RRC连接释放.......................................................... 124

5.2.29 S1AP_UE_CONTEXT_REL_REQ:UE文本释放请求............................... 125

5.2.30 S1AP_UE_CONTEXT_REL_CMD:UE文本释放命令.............................. 125

5.2.31 S1AP_UE_CONTEXT_REL_CMP:UE文本释放完成............................... 126

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