中国移动通信企业标准中国移动VoLTE终端技术规范ChinaMobileVoLTETerminalTechnologySpecification版本号：21.40.0（报批稿）中国移动通信集团公司发布╳╳╳╳-╳╳-╳╳发布╳╳╳╳-╳╳-╳╳实施QB-╳╳-╳╳╳-╳╳╳╳目录前言.......................................................................IV1.范围........................................................................12.规范性引用文件..............................................................13.术语、定义和缩略语..........................................................54.总则........................................................................84.1中国移动VoLTE终端规范的不同阶段......................................84.2中国移动VoLTE终端规范的用词..........................................84.3本标准规范和其它标准的关系............................................84.4本标准规范和LTE终端规范、TD-SCDMA终端规范、GSM终端规范的关系........85.终端功能要求................................................................95.1.概述.................................................................95.2.工作模式.............................................................95.3.频段要求............................................................105.4.Inter-RAT数据互操作要求.............................................105.5.话音模式选择........................................................105.5.1.话音模式配置.................................................105.5.2.话音模式选择原则.............................................105.6.接入层功能..........................................................115.6.1.PDN连接......................................................115.6.2.IPv6.........................................................175.6.3.承载要求.....................................................185.6.4.LTE无线增强功能..............................................195.7.IMS控制功能.........................................................205.7.1.注册和注销...................................................205.7.2.鉴权.........................................................225.7.3.会话管理.....................................................235.7.4.媒体切换.....................................................265.7.5.订阅.........................................................265.7.6.Forking......................................................275.7.7SIP定时器....................................................275.8.异常处理............................................................275.8.1.初始注册异常情况.............................................275.8.2.重注册异常情况...............................................285.8.3.SilentRedial方案.............................................285.8.4呼叫异常情况.................................................295.9.IMS媒体功能.........................................................295.9.1.话音编解码...................................................295.9.2.话音质量增强.................................................305.9.3.视频编解码...................................................305.10.SRVCC.............................................................315.10.1.SRVCC能力上报...............................................315.10.2.SRVCC测量...................................................315.10.3.SRVCC流程...................................................315.11.机卡接口要求................
