愛立信XX移動網(wǎng)格化日常網(wǎng)優(yōu)寶典.rar (2.63 MB)前 言 ..................................................................................................................................................... 5
1 現(xiàn)場基礎(chǔ)優(yōu)化 ............................................................................................................................... 6
1.1 話音業(yè)務(wù)優(yōu)化 ....................................................................................................................... 6
1.1.1 全程成功率 ...................................................................................................................... 6
1.1.2 覆蓋專題 ........................................................................................................................ 12
1.1.3 直放站專題 .................................................................................................................... 15
1.1.4 工程細節(jié) ........................................................................................................................ 16
1.2 數(shù)據(jù)業(yè)務(wù)優(yōu)化 ..................................................................................................................... 16
1.2.1 下載速率慢 .................................................................................................................... 16
1.2.2 路測掉線 ........................................................................................................................ 17
2 話統(tǒng)指標基礎(chǔ)優(yōu)化 ...................................................................................................................... 17
2.1 TCH掉話 ............................................................................................................................. 17
2.1.1 TCH掉話計數(shù)器 ............................................................................................................ 17
2.1.2 TCH掉話分類處理思路................................................................................................. 18
2.2 TCH擁塞 ............................................................................................................................. 21
2.2.1 TCH擁塞計數(shù)器 ............................................................................................................ 21
2.2.2 TCH擁塞處理思路 ........................................................................................................ 22
2.3 SDCCH掉話 ........................................................................................................................ 22
2.3.1 SDCCH掉話原因 ........................................................................................................... 22
2.3.2 SDCCH掉話處理思路 ................................................................................................... 23
2.4 SDCCH擁塞 ........................................................................................................................ 23
2.4.1 小區(qū)級 ............................................................................................................................ 23
2.4.2 系統(tǒng)級 ............................................................................................................................ 23
2.4.3 4倍SDCCH功能 ............................................................................................................. 24
2.5 無線接入性 ......................................................................................................................... 24
2.5.1 指標計數(shù)公式 ................................................................................................................ 24
2.5.2 非擁塞無線接入性問題分析 ........................................................................................ 24
2.6 隨機接入性 ......................................................................................................................... 25
2.7 PDCH分配成功率、TBF建立成功率 ............................................................................... 25
2.7.1 GPRS與GSM的2點區(qū)別 ................................................................................................ 25
2.7.2 常用優(yōu)化參數(shù) ................................................................................................................ 26
2.7.3 常見基礎(chǔ)問題 ................................................................................................................ 29
3 頻率與話音質(zhì)量 .......................................................................................................................... 30
3.1 頻率基礎(chǔ) ............................................................................................................................. 30
3.1.1 頻段 ............................................................................................................................... 30
3.1.2 干擾 ............................................................................................................................... 33
3.1.3 跳頻 ............................................................................................................................... 33
3.2 話音質(zhì)量 ............................................................................................................................. 36
3.2.1 無線質(zhì)量 ........................................................................................................................ 36
3.2.2 端到端話音質(zhì)量 ............................................................................................................ 37
3.3 AMR自適應(yīng)多速率 ............................................................................................................ 41
3.3.1 AMR帶來的好處 ............................................................................................................ 41
3.3.2 AMR功能開啟方法 ........................................................................................................ 41
3.3.3 AMR新增計數(shù)器 ............................................................................................................ 41
4 切換性能提升 .............................................................................................................................. 42
4.1 切換的意義 ......................................................................................................................... 42
4.2 切換性能計數(shù)器 ................................................................................................................. 42
4.2.1 BSC判決切換的6種類型 ............................................................................................... 42
4.2.2 切換命令總數(shù) ................................................................................................................ 43
4.2.3 強信號切出、頻繁切換統(tǒng)計 ........................................................................................ 43
4.2.4 指配切換統(tǒng)計 ................................................................................................................ 43
4.2.5 內(nèi)切統(tǒng)計 ........................................................................................................................ 43
4.3 切換算法對比 ..................................................................................................................... 43
4.3.1 愛立信切換算法 ............................................................................................................ 43
4.3.2 華為切換算法 ................................................................................................................ 44
4.4 切換優(yōu)化 ............................................................................................................................. 45
4.4.1 評估切換性能的維度 .................................................................................................... 45
4.4.2 切換性能優(yōu)化手段(冉家壩“雙最佳”經(jīng)驗) .............................................................. 49
5 尋呼與位置更新 .......................................................................................................................... 56
5.1 尋呼、位置更新計數(shù)器 ..................................................................................................... 56
5.1.1 尋呼統(tǒng)計計數(shù)器 ............................................................................................................ 56
5.1.2 位置更新統(tǒng)計計數(shù)器 .................................................................................................... 58
5.2 重要概念區(qū)分 ..................................................................................................................... 58
5.2.1 5種尋呼方式的區(qū)別 ...................................................................................................... 58
5.2.2 3種位置更新方式的區(qū)別 .............................................................................................. 59
5.3 尋呼策略 ............................................................................................................................. 60
5.4 愛立信MSC級參數(shù) ............................................................................................................. 60
5.5 典型問題分析 ..................................................................................................................... 61
5.5.1 LAC區(qū)規(guī)劃 ..................................................................................................................... 61
5.5.2 小區(qū)級尋呼擁塞 ............................................................................................................ 61
5.5.3 整體尋呼擁塞 ................................................................................................................ 62
5.5.4 位置更新引起未接通 .................................................................................................... 63
6 容量能力評估 .............................................................................................................................. 64
6.1 話音業(yè)務(wù) ............................................................................................................................. 64
6.1.1 小區(qū)級 ............................................................................................................................ 64
6.1.2 BSC/MSC級 .................................................................................................................... 66
6.2 數(shù)據(jù)業(yè)務(wù) ............................................................................................................................. 67
6.2.1 小區(qū)級 ............................................................................................................................ 67
6.2.2 BSC級 ............................................................................................................................. 67
6.3 數(shù)據(jù)業(yè)務(wù)對話音業(yè)務(wù)影響 ................................................................................................. 69
6.3.1 對CCCH信道影響 ......................................................................................................... 69
6.3.2 對TCH信道影響 ............................................................................................................ 69
6.3.3 解決辦法 ........................................................................................................................ 69
7 保障方案制定 .............................................................................................................................. 69
7.1 節(jié)假日保障 ......................................................................................................................... 69
7.2 開學保障 ............................................................................................................................. 70
7.3 重大活動保障 ..................................................................................................................... 70
7.4 公司會議 ............................................................................................................................. 71
7.5 VIP出行 .............................................................................................................................. 71
8 附錄：層3信令基礎(chǔ) .................................................................................................................... 71
8.1 呼叫流程 ............................................................................................................................. 71
8.2 切換流程 ............................................................................................................................. 72
8.3 短信流程 ............................................................................................................................. 73
8.4 位置更新 ............................................................................................................................. 74