【正文】 . . . . .畢 業(yè) 設(shè) 計（論 文）外 文 參 考 資 料 及 譯 文譯文題目： TDSCDMA與WCMA網(wǎng)絡(luò)優(yōu)化分析 　　　　　 3G network optimization 學(xué)生姓名： 學(xué)　　號： 專　　業(yè)： 通信工程 所在學(xué)院： 龍蟠學(xué)院 指導(dǎo)教師： 職　　稱： 講師 2011年 12 月 1 日說明：要求學(xué)生結(jié)合畢業(yè)設(shè)計（論文）課題參閱一篇以上的外文資料，并翻譯至少一萬印刷符（或譯出3千漢字）以上的譯文。譯文原則上要求打?。ㄈ缡謱懀宦捎?00字方格稿紙書寫），連同學(xué)校提供的統(tǒng)一封面及英文原文裝訂，于畢業(yè)設(shè)計（論文）工作開始后2周內(nèi)完成，作為成績考核的一部分。3G network optimization摘自TDSCDMA無線網(wǎng)絡(luò)優(yōu)化原理及方法One, the basic process of 3G network optimizationOperators aim is to build a profitable network, they are very concerned about the network construction, expansion and upgrade in the process of investment cost and its final performance, but the expansion, upgrade costs and network performance is a pair of contradiction. Construction cost budget and control can get relatively accurate numerical, but the performance of the network is posed of many subjective and objective factors. On one hand, the network capacity expansion, upgrading and upgrades to existing users can guarantee the normal use, on the other hand, it also can provide petitive new business, and makes further expansion, upgrading and upgrades can be carried out smoothly. In this way, the network optimization bees a longterm, iterative process.Network optimization should be able to according to the operator39。s specific needs by means of software tool automatically, can also through manual intervention to achieve the capacity, coverage, QoS ensure a balance point. 3G network system structure is shown in figure 1. Generally, network and includes 3 levels:On Node B, the mobile station performance indicators for realtime calculation and simulation, including fast power control, rapid congestion resolved, wireless link adaptive, channel allocation。Real time load analysis and control。Based on experience or statistical results, through roadshow, network optimization software for network performance prediction.In front of 2 levels, in the network is pleted, by the network management system through the online monitoring and statistics in real time automatic adjustment, while the third level is the need for professionals to carry out, also is we often say that the network optimization.Artificial network optimization can be divided into the following several steps:First of all, the operator should be based on their own characteristics the definition of a good network optimization is pleted to achieve the goal, which determine the above mentioned balance point, including pointtopoint quality objectives, different business types of performance indicators and related KPI ( key performance indicators) of various values。 later, the existing network performance index data acquisition, through a variety of channels, such as network management system and the convergence device feedback, protocol analyzers and even maintenance department customer plaints such as summary, in conclusion, should be through a variety of ways, using a variety of means, collecting more data, the analysis result is accurate.The collected data is input to the network planning software analysis, can generate the current network status, or achieve some indexes are needed for network configuration. In the process of system simulation, some results in the initial analysis is plete, the error will be relatively large, at this time, some parameters are finetuned, local iterative analysis of system, it was repeatedly modified, will eventually get accurate results.Network optimization to achieve the purpose of including: improving network coverage, reduce the system call drop rate, loss rate, improve the switching success rate, on Node B load adjustment, optimization of Node B pilot frequency distribution. Optimization of indicators include: Node B sector transmission power, antenna height and angle, the adjacent Node B position and the pilot signal, the adjacent Node B pilot search window size, trigger switch threshold value.In the process of network optimization, we need to use different tools, and these tools have different effects.1 planning softwareIn detail simulation process, we will be new or expansion, upgrading the site information input to the electronic map.