【正文】 various relevant design parameters of wireless work engineering and radio resource parameters. Its optimized core is to follow the basic principles of WCDMA , control the cover and reduce the radio frequency interference . It is different from the optimization of the traditional 2G works because of its multiservice features and characteristics of HSDPA wireless broad band. WCDMA is a selfjam system which brings the problems of nearfar problem and pilot channel pollution. So optimization is necessary the aim of which is to improve the system performance step by step and infinitely approach the groove stat of the work. So we can meet the needs of sustaining changes and developing service requirements and provide the best service quality. In order to improve the quality and stability of work operation ， We can according different situations to deal with the problems and adjust the parameters by talking into account other indicators， the ultimate goal is to make the work keep a dynamic equilibrium. Keywords: WCDMA ； work optimization； UMTS III 目 錄 1 緒論 .......................................................................................................................................... 1 課題背景 ........................................................................................................................... 1 WCDMA 網(wǎng)絡(luò)概況 .......................................................................................................... 1 WCDMA 標(biāo)準(zhǔn)的提出和商用情況 ........................................................................................ 1 WCDMA 無(wú)線網(wǎng)絡(luò)優(yōu)化技術(shù)的意義 .................................................................................... 1 課題完成的意義和主要內(nèi)容 ........................................................................................... 2 2 WCDMA 系統(tǒng)概述 ....................................................................................................................... 4 WCDMA 系統(tǒng)結(jié)構(gòu) ................................................................................................................ 4 WCDMA 信道 ........................................................................................................................ 6 邏輯信道 .................................................................................................................... 6 傳輸信道 .................................................................................................................... 7 物理信道 .................................................................................................................... 7 WCDMA 系統(tǒng)優(yōu)點(diǎn)及主要技術(shù) ............................................................................................ 7 軟切換 ........................................................................................................................ 8 功率控制技術(shù) ............................................................................................................ 8 采用碼分多址技術(shù) .................................................................................................... 8 特有的分集技術(shù) ........................................................................................................ 9 3 WCDMA 無(wú)線網(wǎng)絡(luò)優(yōu)化 ............................................................................................................. 10 WCDMA 無(wú)線網(wǎng)絡(luò)優(yōu) 化 ...................................................................................................... 10 網(wǎng)絡(luò)規(guī)劃難點(diǎn) ................................................................................................................. 10 網(wǎng)絡(luò)優(yōu)化的解決方案 ..................................................................................................... 10 基站系統(tǒng) .................................................................................................................. 10 直放站系統(tǒng) .............................................................................................................. 11 基站增強(qiáng)器 .............................................................................................................. 12 掉話問(wèn)題分析 ................................................................................................................. 12 路測(cè)掉話定義 .......................................................................................................... 12 掉話分析流程之弱覆蓋 .......................................................................................... 13 掉話流程分析之切換導(dǎo)致掉話 .............................................................................. 14 異常分析 .................................................................................................................. 15 掉話分析數(shù)據(jù)流程 .................................................................................................. 15 無(wú)線資源管理 ................................................................................................................. 16 無(wú)線資源管理概述 .................................................................................................. 16 信道控制 .................................................................................................................. 18 碼資源管理 .............................................................................................................. 19 功率控制 .................................................................................................................. 19 連接移動(dòng)性管理 ...................................................................................................... 20 IV 4 WCDMA 無(wú)線網(wǎng)絡(luò)優(yōu)化案例 .............................................................................................. 21 覆蓋優(yōu)化 ......................................................................................................................... 21 過(guò)覆蓋問(wèn)題優(yōu)化 ...................................................................................................... 21 過(guò)覆蓋解決方法 ..................................