无线接入网技术规范组;NR;
R NR 和 和 N NG-RAN 概述和总体描述，阶段 2 2
前言 7
1 范围.......................................................................................................................................................... 8
2 参考.......................................................................................................................................................... 8
3 缩写和定义.............................................................................................................................................. 9
3.1 缩略语.................................................................................................................................................................9
3.2 定义...................................................................................................................................................................11
4 整体架构和功能划分............................................................................................................................ 12
4.1 整体架构...........................................................................................................................................................12
4.2 功能划分...........................................................................................................................................................13
4.3 网络接口...........................................................................................................................................................15
4.3.1 NG接口..........................................................................................................................................................15
4.3.1.1 NG用户面................................................................................................................................................15
4.3.1.2 NG控制面................................................................................................................................................16
4.3.2 Xn接口..........................................................................................................................................................17
4.3.2.1 Xn用户面................................................................................................................................................17
4.3.2.2 Xn控制面................................................................................................................................................17
4.4 无线协议架构...................................................................................................................................................18
4.4.1 用户面..........................................................................................................................................................18
4.4.2 控制面..........................................................................................................................................................18
4.5 多RAT双连接.....................................................................................................................................................19
5 物理层（L2).......................................................................................................................................... 19
5.1 波形，数学原理和框架结构...........................................................................................................................19
5.2 下行...................................................................................................................................................................20
5.2.1 下行传输方案..............................................................................................................................................20
5.2.2 物理下行链路共享信道的物理层处理......................................................................................................21
5.2.3 物理下行控制信道......................................................................................................................................21
5.2.4 同步信号和PBCH..........................................................................................................................................22
5.2.5 物理层流程..................................................................................................................................................23
5.2.5.1 链路适配................................................................................................................................................23
5.2.5.2 功率控制................................................................................................................................................23
5.2.5.3 小区搜索................................................................................................................................................23
5.2.5.4 HARQ.....................................................................................................................................................23
5.2.5.5 接收SIB1................................................................................................................................................23
5.3 上行...................................................................................................................................................................23
5.3.1 上行传输方案..............................................................................................................................................23
5.3.2 物理上行链路共享信道的物理层处理......................................................................................................24
5.3.3 物理上行控制信道......................................................................................................................................24
5.3.4 随机接入......................................................................................................................................................25
5.3.5 物理层流程..................................................................................................................................................26
3GPP TS 38.300 V15.5.0(2019-3) 3 版本：R15 中文翻译：5G通信
5.3.5.1 链路适配................................................................................................................................................26
5.3.5.2 上行链路功率控制................................................................................................................................26
5.3.5.3 上行链路时序控制................................................................................................................................26
5.3.5.4 HARQ.....................................................................................................................................................26
5.4 载波聚合...........................................................................................................................................................26
5.4.1 载波聚合......................................................................................................................................................26
5.4.2 增强上行链路..............................................................................................................................................26
5.5 传输信道...........................................................................................................................................................27
6 数据链路层（L2).................................................................................................................................. 28
6.1 概述...................................................................................................................................................................28
6.2 MAC子层.............................................................................................................................................................30
6.2.1 服务和功能..................................................................................................................................................30
6.2.2 逻辑信道......................................................................................................................................................31
6.2.3 映射到传输信道..........................................................................................................................................31
6.2.4 HARQ.......................................................................................................................................................... 32
6.3 RLC子层.............................................................................................................................................................32
6.3.1 传输模式......................................................................................................................................................32
6.3.2 服务和功能..................................................................................................................................................32
6.3.3 ARQ.............................................................................................................................................................32
6.4 PDCP子层...........................................................................................................................................................33
6.4.1 服务和功能..................................................................................................................................................33
6.5 SDAP子层...........................................................................................................................................................33
6.6 数据链路层（L2)数据流.................................................................................................................................33
6.7 载波聚合...........................................................................................................................................................34
6.8 双连接...............................................................................................................................................................36
6.9 增强上行链路...................................................................................................................................................36
6.10 带宽适应...........................................................................................................................................................36
7 RRC........................................................................................................................................................ 37
7.1 服务和功能.......................................................................................................................................................37
7.2 协议详述...........................................................................................................................................................37
7.3 系统信息处理...................................................................................................................................................39
7.3.1 概述..............................................................................................................................................................39
7.3.2 调度..............................................................................................................................................................40
7.3.3 SI修改..........................................................................................................................................................40
7.4 接入控制...........................................................................................................................................................41
7.5 UE能力检索框架...............................................................................................................................................41
7.6 NAS消息的传输.................................................................................................................................................41
7.7 载波聚合...........................................................................................................................................................41
7.8 带宽适应...........................................................................................................................................................41
8 NG身份.................................................................................................................................................... 41
8.1 UE身份...............................................................................................................................................................42
8.2 网络身份...........................................................................................................................................................43
3GPP TS 38.300 V15.5.0(2019-3) 4 版本：R15 中文翻译：5G通信
9 移动性和状态变化................................................................................................................................ 43
9.1 概述...................................................................................................................................................................43
9.2 内部-NR.............................................................................................................................................................44
9.2.1 RRC_IDLE中的移动性..................................................................................................................................44
9.2.1.1 小区选择................................................................................................................................................44
9.2.1.2 小区重选................................................................................................................................................45
9.2.1.3 状态转换 .............................................................................................................................................. 45
9.2.2 RRC_INACTIVE中的移动性..........................................................................................................................47
9.2.2.1 概述........................................................................................................................................................47
9.2.2.2 小区重选................................................................................................................................................48
9.2.2.3 基于RAN的通知区域..............................................................................................................................48
9.2.2.4 状态变化................................................................................................................................................48
9.2.2.4.1 UE触发从RRC_INACTIVE到RRC_CONNECTED的转换........................................................................48
9.2.2.4.2 网络触发从RRC_INACTIVE到RRC_CONNECTED的转换....................................................................50
9.2.2.5 RNA更新..................................................................................................................................................51
9.2.3 RRC_CONNECTED中的移动性........................................................................................................................53
9.2.3.1 概述........................................................................................................................................................53
9.2.3.2 切换........................................................................................................................................................54
9.2.3.2.1 控制面处理......................................................................................................................................56
9.2.3.2.2 用户面处理......................................................................................................................................58
9.2.3.2.3 数据发送..........................................................................................................................................58
9.2.3.3 重置流程................................................................................................................................................59
9.2.4 测量..............................................................................................................................................................60
9.2.5 寻呼..............................................................................................................................................................62
9.2.6 随机接入流程..............................................................................................................................................63
9.2.7 无线链路故障..............................................................................................................................................64
9.2.8 波束故障检测和回复..................................................................................................................................64
9.3 外部 RAT...........................................................................................................................................................65
9.3.1 5GC内部........................................................................................................................................................65
9.3.1.1 小区重选................................................................................................................................................65
9.3.1.2 切换........................................................................................................................................................65
9.3.1.3 测量........................................................................................................................................................66
9.3.2 从5GC到EPC..................................................................................................................................................66
9.3.2.1 小区重选................................................................................................................................................66
9.3.2.2 切换........................................................................................................................................................66
9.3.2.3 测量........................................................................................................................................................66
9.3.2.4 数据发送................................................................................................................................................66
9.3.2 从5GC到EPC..................................................................................................................................................66
9.3.3 从EPC到5GC..................................................................................................................................................67
9.3.3.1 控制平面的数据发送 ........................................................................................................................ 67
9.3.3.2 用户平面的数据发送 ........................................................................................................................ 67
9.4 漫游和接入限制...............................................................................................................................................68
10 调度........................................................................................................................................................ 68
10.1 基本调度流程操作...........................................................................................................................................68
3GPP TS 38.300 V15.5.0(2019-3) 5 版本：R15 中文翻译：5G通信
10.2 下行调度...........................................................................................................................................................69
10.3 上行调度...........................................................................................................................................................69
10.4 支持调度流程操作的测量...............................................................................................................................70
10.5 速率控制...........................................................................................................................................................70
10.5.1 下行..............................................................................................................................................................70
10.5.2 上行..............................................................................................................................................................70
10.6 激活/停用机制.................................................................................................................................................71
10.7 E-UTRA-NR物理层资源协调.............................................................................................................................71
11 UE电量节省............................................................................................................................................ 71
12 服务质量................................................................................................................................................ 72
12.1 概述...................................................................................................................................................................72
12.2 显式拥塞通知...................................................................................................................................................75
13 安全........................................................................................................................................................ 75
13.1 概述和原则.......................................................................................................................................................75
13.2 安全终端点.......................................................................................................................................................77
13.3 状态变化和流动...............................................................................................................................................77
14 UE功能.................................................................................................................................................... 78
15 自我配置和自我优化............................................................................................................................ 78
15.1 定义...................................................................................................................................................................78
15.2 UE支持自我配置和自我优化...........................................................................................................................78
15.3 自配置...............................................................................................................................................................78
15.3.1 NG-C接口的动态配置..................................................................................................................................78
15.3.1.1 先决条件................................................................................................................................................78
15.3.1.2 SCTP初始化............................................................................................................................................78
15.3.1.3 应用层初始化........................................................................................................................................78
15.3.2 Xn接口的动态配置......................................................................................................................................78
15.3.2.1 先决条件................................................................................................................................................79
15.3.2.2 SCTP初始化............................................................................................................................................79
15.3.2.3 应用层初始化........................................................................................................................................79
15.3.3 自动邻居小区关系功能..............................................................................................................................79
15.3.3.1 一般描述................................................................................................................................................79
15.3.3.2 系统内 - NR内自动相邻小区关系功能..............................................................................................80
15.3.3.3 系统内 - 内部E-UTRA自动相邻小区关系功能..................................................................................81
15.3.3.4 系统内 - RAT间自动相邻小区关系函数............................................................................................81
15.3.3.5 系统间自动相邻小区关系功能............................................................................................................81
15.3.4 Xn-C TNL地址发现......................................................................................................................................82
15.4 支持节能...........................................................................................................................................................83
15.4.1 概述..............................................................................................................................................................83
15.4.2 解决方案说明..............................................................................................................................................83
15.4.3 运维要求......................................................................................................................................................83
3GPP TS 38.300 V15.5.0(2019-3) 6 版本：R15 中文翻译：5G通信
16 垂直支撑................................................................................................................................................ 84
16.1 URLLC..............................................................................................................................................................84
16.1.1 概述..............................................................................................................................................................84
16.1.2 LCP限制........................................................................................................................................................84
16.1.3 数据包复制..................................................................................................................................................84
16.2 IMS语音.............................................................................................................................................................85
16.2.1 支持MMTEL IMS语音和视频增强功能........................................................................................................85
16.2.1.1 RAN辅助的编解码器适配......................................................................................................................85
16.2.1.2 MMTEL语音质量/覆盖增强功能............................................................................................................86
16.3 网络切片...........................................................................................................................................................86
16.3.1 一般原则和请求..........................................................................................................................................86
16.3.2 CN实例和NW切片选择..................................................................................................................................88
16.3.2.1 CN-RAN交互和内部RAN方面..................................................................................................................88
16.3.2.2 无线接口方面........................................................................................................................................89
16.3.3 资源隔离与管理..........................................................................................................................................89
16.3.4 信号方面......................................................................................................................................................89
16.3.4.1 一般描述................................................................................................................................................89
16.3.4.2 CN实例和NW切片选择............................................................................................................................89
16.3.4.3 UE上下文处理........................................................................................................................................90
16.3.4.4 PDU会话处理..........................................................................................................................................91
16.3.4.5 移动性....................................................................................................................................................92
16.4 公共警告系统...................................................................................................................................................94
16.5 紧急服务...........................................................................................................................................................95
16.5.1 概述..............................................................................................................................................................95
16.5.2 IMS紧急呼叫................................................................................................................................................95
16.5.3 eCall over IMS.............................................................................................................................................95
16.5.4 回退..............................................................................................................................................................95
3GPP TS 38.300 V15.5.0(2019-3) 7 版本：R15 中文翻译：5G通信
附件A A （资料性附录） ： RAN 中的 QoS 处 理..............................................................................................96
A.1 PDU会话建立.......................................................................................................................................... 96
A.2 没有显式信令的新QoS流...................................................................................................................... 97
A.3 具有NAS反射QoS和显式RRC信令的新QoS流........................................................................................ 97
A.4 具有显式信令的新QoS流...................................................................................................................... 98
A.5 用显式信令释放QoS流.......................................................................................................................... 99
A.6 UE发起的UL QoS流.............................................................................................................................. 100
附件B B （资料性附录） ： 部署方案........................................................................................................102
B.1 增强上行链路...................................................................................................................................... 102
B.2 载波中的多个SSB................................................................................................................................ 102
附件C C （资料性附录） ： 更改记录........................................................................................................104
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