5G-信令分析指导书.doc下载

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1 概述.................................................................................................. 1
2 开机入网.......................................................................................... 3
2.1 小区搜索与选择.................................................................................................. 3
2.2 系统消息广播...................................................................................................... 4
2.2.1 系统消息获取................................................................................................... 6
2.2.2 系统消息更新................................................................................................... 7
2.2.3 ODOSI过程...................................................................................................... 8
2.2.4 关键消息解读................................................................................................... 9
2.2.4.1 MIB................................................................................................................. 9
2.2.4.2 SIB1............................................................................................................... 11
2.2.4.3 SI................................................................................................................... 17
2.3 随机接入............................................................................................................ 18
2.3.1 基于竞争的随机接入..................................................................................... 20
2.3.2 基于非竞争的随机接入................................................................................. 24
2.4 RRC连接建立.................................................................................................... 28
2.4.1 RRC建立流程................................................................................................. 29
2.4.2 RRC拒绝过程................................................................................................. 31
2.4.3 RRC重发处理................................................................................................. 31
2.4.4 关键消息解读................................................................................................. 33
2.4.4.1 RRCSetupRequest......................................................................................... 33
2.4.4.2 RRCSetup...................................................................................................... 34
2.4.4.3 RRCSetupComplete...................................................................................... 36
2.4.4.4 RRCReject.................................................................................................... 37
2.5 注册流程............................................................................................................ 37
3 上下文管理.................................................................................... 38
3.1 初始上下文建立过程........................................................................................ 38
3.1.1 安全模式过程................................................................................................. 40
3.1.2 UE能力查询过程........................................................................................... 42
3.1.3 关键消息解读................................................................................................. 43
3.1.3.1 NGAP INITIAL CONTEXT SETUP REQUEST......................................... 43
3.1.3.2 NGAP INITIAL CONTEXT SETUP RESPONSE....................................... 44
3.1.3.3 RRC SecurityModeCommand...................................................................... 45
3.1.3.4 RRC SecurityModeComplete....................................................................... 45
3.1.3.5 RRC UECapabilityEnquiry........................................................................... 45
3.1.3.6 RRC UECapabilityInformation.................................................................... 46
3.2 UE上下文修改过程.......................................................................................... 46
3.3 UE上下文释放过程.......................................................................................... 48
4 会话管理........................................................................................ 49
4.1 5G QoS Architecture........................................................................................... 49
4.1.1 概述................................................................................................................. 49
4.1.2 QoS Flow......................................................................................................... 51
4.1.3 QoS Parameters................................................................................................ 51
4.1.4 QoS Flow到DRB的映射.............................................................................. 56
4.2 PDU会话建立过程............................................................................................ 58
4.3 PDU会话修改过程............................................................................................ 59
4.4 PDU会话释放过程............................................................................................ 59
4.5 关键消息解读.................................................................................................... 60
4.5.1 NGAP PDU SESSION RESOURCE SETUP REQUEST............................... 60
4.5.2 NGAP PDU SESSION RESOURCE SETUP RESPONSE............................. 63
4.5.3 NGAP PDU SESSION RESOURCE MODIFY REQUEST........................... 63
4.5.4 NGAP PDU SESSION RESOURCE MODIFY RESPONSE......................... 65
4.5.5 RRCReconfiguration........................................................................................ 65
4.5.6 RRCReconfigurationComplete........................................................................ 66
5 寻呼流程........................................................................................ 67
5.1 5GC寻呼............................................................................................................ 67
5.1.1 信令流程......................................................................................................... 68
5.1.2 关键消息解读................................................................................................. 70
5.1.2.1 NGAP PAGING............................................................................................ 70
5.1.2.2 RRC PAGING............................................................................................... 71
5.2 RAN寻呼........................................................................................................... 71
5.2.1 信令流程......................................................................................................... 72
5.2.2 关键消息解读................................................................................................. 73
5.2.2.1 RAN PAGING.............................................................................................. 73
5.3 寻呼消息发送.................................................................................................... 75
6 切换流程........................................................................................ 77
6.1 站内切换............................................................................................................ 77
6.2 Xn切换............................................................................................................... 80
6.3 N2切换............................................................................................................... 82
6.4 LNR切换............................................................................................................ 83
6.5 LNR重定向........................................................................................................ 85
7 NAS流程....................................................................................... 87
7.1 注册.................................................................................................................... 88
7.2 去注册（终端发起）........................................................................................ 88
7.3 去注册（网络发起）........................................................................................ 89
7.4 业务请求（主叫）............................................................................................ 89
7.5 业务请求（被叫）............................................................................................ 90

文档名称：5G-信令分析指导书.doc