目录
1． 背景..........................................................................................................................1
2． VONR 基本原理..........................................................................................................1
3． VONR 覆盖分析..........................................................................................................3
4． VONR 容量分析..........................................................................................................4
4.1 2.6G VONR 容量分析.......................................................................................................4
4.2 700M VONR 容量分析.......................................................................................................5
5． VINR 容量分析..........................................................................................................6
5.1 2.6G VINR 容量分析.......................................................................................................6
5.2 700M VINR 容量分析.......................................................................................................7
6． 各厂家最低版本要求 ...............................................................................................8
7． VONR 功能开启和基线参数 .......................................................................................8
8． VONR 关键功能........................................................................................................11
8.1 EVS 自适应编码 ............................................................................................................11
8.2 弱场起呼转 EPS FB 功能..............................................................................................12
8.3 VONR 头压缩 ROHC..........................................................................................................13
8.4 VONR RLC 分片优化 .......................................................................................................14
8.5 VONR 基于语音质量切换功能.......................................................................................14
8.6 VONR 专用 C-DRX 功能 ..................................................................................................15
8.7 基于覆盖的 VONR 到 VOLTE 的切换 ..............................................................................16
8.8 VONR 5QI1/5QI5 上行预调度 .......................................................................................16
8.9 上行 MCS 选阶优化......................................................................................................17
8.10 VONR 质差终端黑名单功能...........................................................................................17
9． VONR 质量评价指标体系.........................................................................................17
9.1 路测指标 .......................................................................................................................17
9.2 网管指标 .......................................................................................................................19
10． VONR 优化方法........................................................................................................19
10.1 VONR 接入问题 ..............................................................................................................19
10.2 VONR 接通时延问题.......................................................................................................22
10.3 VONR 语音质量问题.......................................................................................................24
10.4 VONR 留得住问题...........................................................................................................29
10.5 VONR 掉话问题 ..............................................................................................................31
11． VONR 典型优化案例 ................................................................................................32
11.1 无线案例 .......................................................................................................................32
11.1.1 华为设备无线链路失败 RRC 重建后，终端收到网络下发的 RRC Release 导致
