产品名称Product name LTE 产品版本Product version eRAN 3.0 密级Confidentiality level 内部公开 Total 59pages 共59页 LTE-TDD问题定位指导书-吞吐量篇
LTE-TDD问题定位指导书-吞吐量篇
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密级：内部公开
目 录Table of Contents
1 免责说明 .................................................................................................... 错误！未定义书签。
2 概述 ............................................................................................................................................... 6 3 基础知识........................................................................................................................................ 6 3.1 基本概念 ................................................................................................................................... 6 3.1.1 吞吐量相关指标定义 ..................................................................................................... 6 3.1.2 各层开销分析 ................................................................................................................ 7 3.2 吞吐量计算 ............................................................................................................................... 9 3.2.1 峰值吞吐量计算方法 ..................................................................................................... 9 3.2.2 单UE理论峰值吞吐量 .................................................................................................. 10 3.2.3 小区理论峰值吞吐量 ................................................................................................... 11 3.3 影响吞吐量的相关因素 ........................................................................................................... 13 3.3.1 呼叫流程中与吞吐率有关的关键信令 ......................................................................... 13 3.3.2 下行吞吐率基本影响因素 ............................................................................................ 14 3.3.3 上行吞吐率基本影响因素 ............................................................................................ 16 3.4 工具简介 ................................................................................................................................. 17 4 基本分析方法 .............................................................................................................................. 18 4.1 下行吞吐量基本分析方法........................................................................................................ 18 4.2 上行吞吐量基本分析方法 .................................................................................................. 25 5 深入分析方法 .............................................................................................................................. 29 5.1 下行吞吐量深入分析 ............................................................................................................... 29 5.1.1 下行吞吐量专题分析思路 ............................................................................................ 29 5.1.2 单用户峰值吞吐率 ....................................................................................................... 30 5.1.3 分配RB数少/DL Grant不足 ......................................................................................... 30 5.1.4 上行反馈通道问题 ....................................................................................................... 32 5.1.5 MIMO问题 ................................................................................................................... 34 5.1.6 IBLER高问题 .............................................................................................................. 39 5.1.7 MCS偏低/波动 ............................................................................................................ 39 5.1.8 多用户小区吞吐率低问题 ............................................................................................ 41 5.1.9 整网吞吐率问题分析 ................................................................................................... 43 5.2 上行吞吐量深入分析 ............................................................................................................... 44 5.2.1 上行吞吐率根因分析全貌 ............................................................................................ 44 5.2.2 问题定位流程详述 ....................................................................................................... 45 6 典型案例分析 .............................................................................................................................. 53 6.1 下行吞吐量典型案例 ............................................................................................................... 53 6.1.1 Cat3终端下行TM3峰值达不到预期的问题分析........................................................... 53 6.2 上行吞吐量典型案例 ......................................................................................................... 54 6.2.1 上行达不到峰值 .......................................................................................................... 54 6.2.2 上行IBLER不收敛 ....................................................................................................... 56 6.2.3 上行吞吐量不足 .......................................................................................................... 57 6.2.4 上行DTX较多 .............................................................................................................. 58
2013-04-20 华为机密，未经许可不得扩散
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LTE-TDD问题定位指导书-吞吐量篇
tial
密级：内部公开
2013-04-20
华为机密，未经许可不得扩散
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LTE-TDD问题定位指导书-吞吐量篇
文档密级：内部公开
关键词Key words：
摘 要Abstract：本文描述了下行吞吐率问题的定位流程和优化方法。 缩略语清单List of abbreviations： Abbreviations 缩略语 BSR CHR CRC CRNTI CS DCI DMRS DRX DTX eNB E-UTRAN ERAB GPRS GTPU IFTS IMSI KPI LAE LMT LTE MAC MCS MME MSG NACK OM OMT PDCCH PDSCH PHR PRACH PS PUCCH 2016-6-9
Full spelling 英文全名 Buffer Status Report Call History Record Cyclic Redundancy Check Cell Radio Network Temporary Identifier Circuit Switched Downlink Control Information Demodulation Reference Signal Discontinuous Reception Discontinuous Transmission E-UTRAN Node B Chinese explanation 中文解释 缓存状态报告 呼叫历史记录 循环校验 小区无线网络临时标示 电路域 下行控制信息 调制参考信号 非连续接收 非连续发射 E-UTRAN逻辑结点B Evolved Universal Terrestrial Radio Access 演进通用陆地无线接入网络 Network E-UTRAN Radio Access Bearer General Packet Radio Service GPRS Tunnelling Protocol for User Plane Intelligent Field Test System International Mobile Subscriber Identity Key Performance Indicator LTE Analysis Expert Local Maintenance Terminal Long Term Evolution Medium Access Control (protocol layering context) Modulation and Coding Scheme Mobile Management Entity Message Negative Acknowledgement Operation and Maintenance Operation Management Terminal Physical Downlink Control Channel Physical Downlink Shared Channel Power Headroom Physical Random Access Channel Packet Switched Physical Uplink Control Channel 华为机密，未经许可不得扩散
E-UTRAN无线接入承载 通用分组无线接入 GPRS用户面隧道协议 智能路测系统 国际移动用户标示 关键性能指示 LTE分析专家系统 本地维护台 长期演进系统 媒体接入控制层 调制编码方案 移动管理实体 消息 非确认 操作与维护 操作维护台 物理下行控制信道 物理下行共享信道 功率余量 物理随机接入信道 分组域 物理上行控制信道 第4页, 共59页
LTE-TDD问题定位指导书-吞吐量篇
文档密级：内部公开
Abbreviations 缩略语 PUSCH RACH RAR RA-RNTI RRC RRU RSRP SI SIB SINR SRB SRI SRS TA TDD TMSI TRM TTI UE UU AM UM
Full spelling 英文全名 Physical Uplink Shared Channel Random Access Channel Random Access Response Chinese explanation 中文解释 物理上行共享信道 随机接入信道 随机接入响应 Random Access Radio Network Temporary 随机接入无线网络临时标示 Identifier Radio Resource Control Radio Remote Unit Reference Signal Received Power Scheduling Information System Information Block Signal Interference Noise Ratio Signalling Radio Bearer Scheduling Request Information Sounding Reference Signal Timing Advance Time Division Duplex(ing) Temporary Mobile Subscriber Identity Transmission Resource Management Transmission Timing Interval User Equipment User-to-Use Acknowledged mode Unacknowledged mode 无线资源控制 无线拉远单元 参考信号接收功率 调度信息 系统消息块 信号干扰噪声比 信令无线承载 调度请求信息 探测接收信号 时间提前量 时分双工 临时移动标示 传输资源管理 传输时间间隔 用户设备 用户用户间接口 确认模式 非确认模式 2016-6-9
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