【摘要】：伴隨著我國高速鐵路建設(shè)的不斷加快以及鐵路列車的不斷提速,高速鐵路、城際快車已經(jīng)成為越來越多商務(wù)人士的選擇。用戶對網(wǎng)絡(luò)覆蓋和網(wǎng)絡(luò)質(zhì)量提出了越來越高的要求,鐵路覆蓋已經(jīng)成為各個運(yùn)營商展現(xiàn)品牌的戰(zhàn)場。在這種形勢下,成都從2015年開始大力建設(shè)高鐵LTE網(wǎng)絡(luò),力求引領(lǐng)4G生活,滿足客戶日益增長的數(shù)據(jù)業(yè)務(wù)通信需求,營造良好的市場環(huán)境,打造TD-LTE精品網(wǎng)絡(luò)。結(jié)合成都地區(qū)實(shí)際情況,在建設(shè)TD-LTE基站過程中,一般的宏蜂窩基站由于配套齊全,空間大,天面條件好,在選址、規(guī)劃、建設(shè)方面較為容易。而高鐵覆蓋基站由于受地理因素、干擾因素、列車運(yùn)行速度等多個因素影響較大,相對而言建設(shè)難度較大。本文研究了國內(nèi)外的TD-LTE研究的歷史以及發(fā)展近況,以中國移動四川省4G第二批成綿樂高鐵工程項目為例,進(jìn)行了TD-LTE高鐵覆蓋方案研究與設(shè)計。論文首先簡要介紹了TD-LTE結(jié)構(gòu)、OFDM技術(shù)、MIMO技術(shù),分析了高速環(huán)境影響無線系統(tǒng)傳輸性能因素,高鐵移動網(wǎng)絡(luò)信號覆蓋的兩個難題:多普勒頻移和重疊覆蓋距離,總結(jié)了高速覆蓋解決方案算法。接著進(jìn)行了TD-LTE覆蓋性能分析、TD-LTE容量性能分析以及干擾協(xié)調(diào)及規(guī)避方法分析等。然后重點(diǎn)從項目的基本情況、覆蓋指標(biāo)和TD-LTE網(wǎng)絡(luò)現(xiàn)狀入手,分析并確定了本期工程覆蓋規(guī)劃方案,包含組網(wǎng)方式、頻率選擇、覆蓋方案,小區(qū)合并與小區(qū)重疊覆蓋距離、天線設(shè)置方案、站址設(shè)置方案以及ENODEB、天饋線系統(tǒng)的設(shè)備選型。最后從多普勒效應(yīng)、切換影響、車體損耗三個方面提出了成都地區(qū)TD-LTE高鐵覆蓋問題,并進(jìn)行了TD-LTE高鐵覆蓋規(guī)劃優(yōu)化分析,對該項目的TD-LTE網(wǎng)絡(luò)的覆蓋情況、鐵路沿線的服務(wù)等級、鐵路沿線的吞吐量覆蓋進(jìn)行了仿真。測試結(jié)果表明,設(shè)計方案達(dá)到了預(yù)期的目標(biāo)。
[Abstract]:With the rapid construction of high-speed railway in China and the increasing speed of railway train, high-speed railway and inter-city express train have become the choice of more and more business people. Network coverage and network quality are demanded more and more by users. Railway coverage has become the battlefield for operators to show their brand. In this situation, Chengdu began to build high-speed rail LTE network in 2015, striving to lead 4G life, to meet customers' growing data service communication needs, to create a good market environment, and to build TD-LTE quality network. In the process of building TD-LTE base station in Chengdu area, the general macrocellular base station is easy in location, planning and construction because of its complete matching, large space and good sky surface condition. The high-speed railway coverage base station is affected by many factors, such as geographical factors, interference factors, train speed and so on, so it is relatively difficult to build. In this paper, the history and recent development of TD-LTE research at home and abroad are studied. Taking the second 4G project of China Mobile Sichuan Province as an example, the TD-LTE high-speed rail coverage scheme is studied and designed. Firstly, this paper briefly introduces TD-LTE OFDM technology and MIMO technology, analyzes the factors that affect the transmission performance of wireless system in high-speed environment, and two difficult problems of high-speed rail mobile network signal coverage: Doppler frequency shift and overlapped coverage distance. The algorithm of high-speed coverage solution is summarized. Then TD-LTE coverage performance analysis and TD-LTE capacity performance analysis, interference coordination and avoidance methods are analyzed. Then, starting with the basic situation of the project, coverage index and TD-LTE network status quo, this paper analyzes and determines the current project coverage planning plan, including networking mode, frequency selection, coverage scheme, community merging and overlapping coverage distance. Antenna setting scheme, site setting scheme and ENODEB, day feeder system equipment selection. Finally, the paper puts forward the TD-LTE high-speed rail coverage problem in Chengdu area from three aspects: Doppler effect, switch effect and car body loss, and carries out the optimization analysis of TD-LTE high-speed rail coverage planning, the coverage of TD-LTE network and the service grade along the railway line. The throughput coverage along the railway is simulated. The test results show that the design has achieved the expected goal.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.53

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本文編號：2135996