VoLTE网络优化指导手册目录1VoLTE总体背景...................................................................................................41.1概述...........................................................................................................................41.2VOLTE基本概念及技术特征....................................................................................41.3VOLTE关键技术......................................................................................................51.3.1无线承载Qos等级标识................................................................................51.3.2AMR-WB语音编码.......................................................................................61.3.3SIP(SessionInitiationProtocol)&SDP...........................................................72.3.4RoHC健壮性报头压缩协议................................................................................92.3.6eSRVCC(EnhancedSingleRadioVoiceCallContinuity).....................................92VoLTE网络优化流程.........................................................................................113VoLTE网络优化指导思想与原则.....................................................................123.1基础优化.................................................................................................................123.2邻区优化.................................................................................................................133.3时延优化.................................................................................................................143.4RTP丢包率优化.....................................................................................................164TD-LTE关键过程信令流程解析.......................................................................164.1概述.........................................................................................................................164.2关键过程信令流程解析.........................................................................................174.2.1注册过程......................................................................................................174.2.2语音呼叫过程...............................................................................................194.2.3eSRVCC过程...............................................................................................215VoLTE关键参数解析.........................................................................................236VoLTE专题优化分析.........................................................................................246.1全程呼叫成功率优化.............................................................................................246.1.1指标定义......................................................................................................246.1.2优化方法......................................................................................................266.1.2.1终端侧优化方向................................................................................266.1.2.2无线侧优化方向................................................................................266.1.2.3核心侧优化方向................................................................................276.2MOS简介..............................................
