[正版]5G无线网络优化实践 张守国 沈保华 李曙海 雷志纯 凌文杰 等 清华大学出版社

本书对日常5G无线网络维护和优化过程涉及的知识点进行梳理和系统介绍，侧重介绍NR空口和信令流程，以及消息内容解析。本书内容涵盖5G理论基础、网络架构、协议栈、空口信道、信令流程等。通过学习本书，读者可以快速掌握5G网络的必备知识，对5G网络有一个完整、清晰的认识。

本书是作者根据自身多年的移动网络优化学习经验，围绕运营商优化维护人员的需求编写而成的。本书既可作为5G优化维护人员的工作指导用书，又可作为相关人员参加无线网络协优认证考试的参考用书。

张守国，正高级工程师，现任职于华信咨询设计研究院有限公司，长期从事无线网络优化工作，发表《大型场馆容量设计思考》《干扰矩阵中的邻区补偿技术探讨》等多篇论文，出版《LTE无线网络优化实践》《4G无线网络原理及优化》两本著作。

沈保华，高级工程师，省级运营商无线网优中心优化主管，运营商集团高级专家，长期从事无线网络规划优化工作，拥有丰富的移动通信领域从业经验和2G/3G/4G/5G实战经验，曾获全国移动通信5G技术职业技能竞赛二等奖，发表论文多篇，出版著作一本。

李曙海，高级工程师，省级运营商无线网优中心副总经理，运营商集团B级人才，长期负责无线网络规划优化工作，拥有丰富的移动通信领域从业经验和2G/3G/4G/5G实战经验，主持过2G/3G/4G/5G的多项规划优化创新研究课题，发表论文十余篇，出版著作一本。

凌文杰，高级工程师，现任职于华信咨询设计研究院有限公司，长期从事移动通信规划设计、无线通信及频谱技术研究，曾主持省部级重大科研项目两项，发表论文十余篇。

雷志纯，高级工程师，现任职于华信咨询设计研究院有限公司，主要从事无线网络优化和设计工作。

深入浅出讲解5G网络

分享多年网络优化经验

轻松掌握5G网络精髓

目录

第1章 网络概述

1.1 网络架构 ··········································6

1.1.1 接入网 ·············································7

1.1.2 核心网 ·············································9

1.2 频谱划分 ·········································14

1.2.1 频段定义 ·······································14

1.2.2 频率栅格 ·······································17

1.2.3 同步栅格 ·······································19

1.2.4 BWP概念 ······································23

1.2.5 国内5G频率分配 ·························26

1.3 无线帧结构 ·····································27

1.3.1 基本时间单位 ································27

1.3.2 无线帧结构 ···································28

1.4 协议栈 ·············································33

1.4.1 控制面 ···········································34

1.4.2 用户面 ···········································40

1.5 组网方式 ·········································43

第2章 物理信道

2.1 物理广播信道 ··································51

2.1.1 PBCH位置 ····································51

2.1.2 PBCH内容解析 ····························55

2.2 物理随机接入信道 ··························57

2.3 物理上行控制信道 ··························60

2.4 物理下行控制信道 ··························63

2.4.1 PDCCH位置定义 ··························63

2.4.2 PDCCH功能分类 ··························70

2.5 物理下行共享信道 ··························72

2.6 物理上行共享信道 ··························74

2.7 物理共享信道分配 ··························75

2.8 物理信号 ·········································77

2.8.1 解调用参考信号 ····························80

2.8.2 探测用参考信号 ····························86

2.8.3 信道状态参考信号 ························88

2.8.4 SRS天选 ·······································91

2.9 天线端口 ·········································92

2.10 波束管理 ·······································95

IV

第3章 信令流程分析

3.1 随机接入 ·······································102

3.1.1 竞争模式 ·····································103

3.1.2 非竞争模式 ·································106

3.1.3 RRC连接建立 ·····························107

3.1.4 RRC连接重建 ·····························109

3.1.5 时间提前量 ·································112

3.2 NG连接建立 ·································113

3.3 RRC重配置 ··································119

3.4 服务质量控制 ································123

3.4.1 QoS参数 ·····································124

3.4.2 QoS映射 ·····································127

3.5 开机入网流程 ································129

3.5.1 小区搜索 ·····································129

3.5.2 小区选择 ·····································132

3.5.3 小区重选 ·····································135

3.5.4 注册登记 ·····································138

3.6 鉴权过程和安全过程 ····················145

3.6.1 鉴权过程 ·····································145

3.6.2 安全过程 ·····································148

3.7 PDU会话过程 ·······························151

3.7.1 PDU会话建立流程 ·····················153

3.7.2 PDU会话资源分配 ·····················159

3.8 业务建立流程 ································161

3.8.1 主叫流程 ·····································161

3.8.2 被叫流程 ·····································170

3.8.3 EPS fallback流程 ························174

3.9 切换流程 ·······································179

3.9.1 测量事件的类型 ··························181

3.9.2 切换信令流程 ······························182

3.10 NSA业务流程 ·····························188

3.10.1 辅站SgNB添加过程 ·················192

3.10.2 主站MeNB变更过程 ················200

3.10.3 辅站SgNB变更过程 ·················201

3.10.4 辅站SgNB调整过程 ·················204

3.11 空口主要消息 ······························205

3.11.1 SIB1消息内容解析 ···················208

3.11.2 SIB2消息内容解析 ···················213

3.11.3 SIB3消息内容解析 ···················215

3.11.4 SIB4消息内容解析 ···················215

3.11.5 SIB5消息内容解析 ···················217

第4章 参数定义

4.1 NCGI ·············································220

4.2 PCI ················································220

4.3 SUPI ··············································221

4.4 5G-GUTI ·······································224

4.5 5G-S-TMSI ····································225

4.6 RNTI ·············································225

4.7 5GS TAI ········································227

4.8 S-NSSAI ········································228

4.9 PRACH ·········································229

4.10 RSRP和RSRQ ···························237

4.11 APN和DNN ·······························239

V

第5章 关键技术

5.1 mMIMO ········································242

5.2 高阶调制（256QAM） ·················245

5.3 自适应调制编码 ····························247

5.4 新型多载波技术 ····························249

5.5 移动边缘计算 ································251

5.6 网络切片 ·······································253

5.7 上下行解耦 ···································258

5.8 服务化架构 ···································262

5.9 信道编码（Polar码和LDPC） ·····263

5.10 CU-DU分离 ································263

5.11 CU云化部署 ·······························264

5.12 D2D ·············································265

5.13 NOMA ·········································266

第6章 无线网络优化

6.1 优化概述 ·······································269

6.2 指标和定义 ···································270

6.3 覆盖优化 ·······································273

6.4 接入性能优化 ································275

6.5 掉线率优化 ···································281

6.6 切换性能优化 ································283

6.7 吞吐率优化 ···································286

6.8 地铁隧道优化 ································291

附录A 链路预算 ·················································································297

附录B 信令流程图 ·············································································300

附录C 部分NSA消息 ········································································303

附录D NR规范描述 ···········································································343

附录E 常用术语 ·················································································346

参考文献 ······························································································355