【資料名稱】：EVDO低速率優(yōu)化指導(dǎo)
【資料作者】：HW
【資料日期】：2012
【資料語言】：中文
【資料格式】：DOC
【資料目錄和簡介】：
1.1 EVDO速率優(yōu)化經(jīng)驗(yàn)指標(biāo)...................................................................................................5
1.2 EVDO傳輸結(jié)構(gòu)..................................................................................................................5
1.3 總體優(yōu)化思想..................................................................................................................7
2、EVDO速率優(yōu)化思路....................................................................................................................7
2.1、檢測基站傳輸資源的配置情況.....................................................................................8
2.1.1、單載單扇DO基站的傳輸需求.............................................................................8
2.1.2、單載三扇DO基站的傳輸需求.............................................................................8
2.1.3、單載三扇DO與1X共站的傳輸需求.....................................................................8
2.1.4、傳輸資源緊缺情況下的傳輸配置建議：.........................................................8
2.2、空口優(yōu)化分析要點(diǎn).........................................................................................................8
2.2.1 前向速率優(yōu)化分析要點(diǎn).......................................................................................8
2.2.2 反向速率優(yōu)化分析要點(diǎn).....................................................................................15
2.3、RLP 層優(yōu)化分析要點(diǎn)...................................................................................................20
2.4、PPP 層優(yōu)化分析要點(diǎn)...................................................................................................20
2.5、TCP/IP 層優(yōu)化分析要點(diǎn).............................................................................................22
2.6、速率參數(shù)優(yōu)化分析要點(diǎn)...............................................................................................23
3、EVDO速率慢問題分析流程和定位方法...................................................................................30
3.1、EVDO速率慢問題分析流程...........................................................................................30
3.1.1前向鏈路數(shù)據(jù)速率問題排查流程圖...................................................................30
3.1.2反向鏈路數(shù)據(jù)速率問題排查流程圖...................................................................31
3.2、定位方法-排查系統(tǒng)有無故障.....................................................................................31
3.2.1、網(wǎng)管上有無明顯硬件故障...............................................................................31
案例1. 傳輸誤碼告警造成DO數(shù)據(jù)業(yè)務(wù)速率低...........................................................31
3.2.2、檢查時(shí)鐘是否同步？.......................................................................................33
3.2.3、 跟蹤一下是RSSI、駐波比情況，看是否偏高或偏低。.............................33
案例2. 下洲3扇區(qū)---- 主集RSSI高...........................................................................33 PDF
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www.pdffactory.com福建電信EVDO低速率整治方案指導(dǎo)書3 3.3、定位方法-檢查系統(tǒng)相關(guān)的參數(shù).................................................................................34
3.3.1、物理E1數(shù)目是否足夠.......................................................................................34
案例3. 鏈路帶寬受限導(dǎo)致的DO下行速率過低...........................................................34
3.3.2、檢查BSC和BTS、PDSN數(shù)據(jù)配置.......................................................................34
案例4. E1數(shù)目不足和業(yè)務(wù)鏈路配置錯(cuò)誤造成EV-DO數(shù)據(jù)業(yè)務(wù)下載速率低.............35
3.3.3、檢查傳輸鏈路...................................................................................................35
案例5. 復(fù)雜組網(wǎng)下，中間鏈路問題導(dǎo)致下行速率受限...........................................36
3.4、定位方法-查詢實(shí)時(shí)的用戶占用數(shù).............................................................................37
3.4.1、實(shí)時(shí)的用戶占用數(shù)多.......................................................................................37
案例6. 激活用戶數(shù)較多，因此導(dǎo)致該處單用戶速率下降。...................................37
3.4.2 、實(shí)時(shí)用戶數(shù)不多.............................................................................................40
3.5、定位方法-現(xiàn)場路測勘察進(jìn)行具體分析.....................................................................40
3.5.1、檢查用戶終端...................................................................................................40
案例7. 終端接收性能差異導(dǎo)致DRC申請(qǐng)速率低.........................................................40
3.5.2、檢查反向速率...................................................................................................47
案例8. DO反向干擾優(yōu)導(dǎo)致速率低案例.......................................................................48
3.5.3、檢查無線環(huán)境及參數(shù).......................................................................................54
案例9. 反向功控參數(shù)設(shè)置不合理導(dǎo)致的下載速率低...............................................54
案例10. 區(qū)域弱覆蓋導(dǎo)致的DRC申請(qǐng)速率較低...........................................................55
案例11.越區(qū)覆蓋造成DRC申請(qǐng)速率較低.....................................................................57
3.5.4、啟動(dòng)1xEV RLP統(tǒng)計(jì)...........................................................................................58
案例12. RLP重傳率高導(dǎo)致湖南路基站EVDO低速率處理...........................................58
3.5.5、檢查導(dǎo)頻數(shù)量...................................................................................................59
案例13. 多導(dǎo)頻覆蓋導(dǎo)致速率下降.............................................................................59
案例14. 紅柱子街十字路口DO速率低優(yōu)化案例.........................................................63
案例15. 紅旗小區(qū)DO速率低排查案例.........................................................................71
案例16. AN互聯(lián)提升邊界DO速率.................................................................................74
3.5.6、檢查鄰區(qū)...........................................................................................................75
案例17. 淮北DO鄰區(qū)優(yōu)化案例.....................................................................................75 PDF
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www.pdffactory.com福建電信EVDO低速率整治方案指導(dǎo)書4 3.5.7、參數(shù)優(yōu)化...........................................................................................................78
案例18. 福州五四北DO參數(shù)優(yōu)化案例.........................................................................79
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