目 录

1 掉线类问题..............................................................................................................................................3

1.1 影响掉话问题的常见因素...............................................................................................................3

1.2 整体分析思路...................................................................................................................................4

1.3 掉线问题接入初步分析...................................................................................................................5

1.3.1 KPI趋势分析..............................................................................................................................5

1.4 参数核查...........................................................................................................................................5

1.5 操作日志、设备故障、告警/外部事件排查.................................................................................6

1.6 版本差异和已知问题排查...............................................................................................................8

1.7 网络规划优化...................................................................................................................................8

1.7.1 弱覆盖排查.................................................................................................................................8

1.7.2 切换异常和邻区分析................................................................................................................8

1.7.3 负载和容量分析........................................................................................................................8

1.8 射频通道和干扰排查.......................................................................................................................8

1.9 Top用户/Top终端类型排查............................................................................................................9

1.9.1 TOP用户识别............................................................................................................................9

1.9.2 TOP终端类型识别....................................................................................................................9

1.10 核心网异常排查...............................................................................................................................9

1.11 传输排查...........................................................................................................................................9

2 高S1切换占比问题..............................................................................................................................11

2.1 X2接口信令异常............................................................................................................................11

3 高RRC重建问题...................................................................................................................................13

3.1 重建机制介绍：.............................................................................................................................13

3.2 与主要网管指标关联分析.............................................................................................................14

3.3 与MR指标相关分析......................................................................................................................14

3.4 打开关闭DRX特性重建比率验证................................................................................................14

3.5 相关参数优化.................................................................................................................................14

3.6 与终端关联分析.............................................................................................................................14

3.7 结论.................................................................................................................................................15

4 高PDCP层时延....................................................................................................................................16

4.1 用户面（数据面）时延介绍.........................................................................................................16

4.2 用户面时延问题定位.....................................................................................................................17

4.2.1 Ping时延分段定位..................................................................................................................17

4.3 本地UE PC获取时延....................................................................................................................18

4.4 Wireshark工具精确时延获取.......................................................................................................18

4.5 Ping时延eNodeB侧L2处理时延获取..........................................................................................19 5

总结........................................................................................................................................................21