華為WCDMA高培——掉話問題分析.pdf (826.4 KB)【資料名稱】：華為WCDMA高培——掉話問題分析

【資料作者】：。

【資料日期】：。

【資料語言】：中文

【資料格式】：PDF

【資料目錄和簡介】：

1 概述..........................................................................................................................................8
2 掉話分類定義............................................................................................................................8
2.1 路測掉話定義......................................................................................................................8
2.2 話統(tǒng)指標.............................................................................................................................8
2.3 工具中的定義....................................................................................................................10
3 掉話分析流程及方法...............................................................................................................10
3.1 常見掉話原因....................................................................................................................10
3.1.1 鄰區(qū)漏配.....................................................................................................................10
3.1.2 覆蓋差.........................................................................................................................11
3.1.3 切換導致的掉話..........................................................................................................12
3.1.4 干擾導致的掉話..........................................................................................................12
3.1.5 流程交互失敗..............................................................................................................13
3.1.6 異常分析.....................................................................................................................13
3.2 路測數據分析流程.............................................................................................................14
3.3 話統(tǒng)數據分析流程.............................................................................................................16
3.4 跟蹤數據分析流程.............................................................................................................19
3.5 告警數據分析流程.............................................................................................................21
3.6 用戶投訴分析流程.............................................................................................................21
3.7 調整措施...........................................................................................................................23
3.7.1 工程參數.....................................................................................................................23
3.7.2 小區(qū)參數.....................................................................................................................23
4 典型掉話分析..........................................................................................................................29
4.1 鄰區(qū)漏配...........................................................................................................................29
4.1.1 現象和分析..................................................................................................................29
4.1.2 解決方法.....................................................................................................................30
4.2 覆蓋太差...........................................................................................................................30
4.2.1 現象和分析..................................................................................................................30
4.2.2 解決辦法.....................................................................................................................31
4.3 干擾過強...........................................................................................................................31
4.3.1 導頻污染.....................................................................................................................31
4.3.2 上行干擾導致的掉話...................................................................................................38
4.4 軟切換掉話.......................................................................................................................40
4.4.1 拐角效應.....................................................................................................................40
4.4.2 針尖效應.....................................................................................................................43
4.4.3 主導小區(qū)變化過快.......................................................................................................44
4.5 硬切換掉話.......................................................................................................................45
4.5.1 壓縮模式啟動太遲.......................................................................................................45
4.6 系統(tǒng)間切換掉話................................................................................................................45
4.6.1 鄰區(qū)漏配導致掉話.......................................................................................................45
4.6.2 異系統(tǒng)鄰區(qū)配置過多導致掉話....................................................................................46
4.6.3 LAC配置錯誤導致的掉話............................................................................................46
4.6.4 UE不報測量報告導致掉話..........................................................................................47
4.6.5 切換不及時導致掉話...................................................................................................48
4.6.6 物理信道重配置時發(fā)生最優(yōu)小區(qū)變更導致掉話...........................................................50
4.6.7 UE回切換失敗導致掉話..............................................................................................51
4.6.8 壓縮模式啟動太遲.......................................................................................................52
4.7 設備異常掉話....................................................................................................................52
4.7.1 NodeB上行同步導致的掉話........................................................................................52
4.7.2 手機問題.....................................................................................................................53