成都地区TD-LTE高铁覆盖方案研究与设计

发布时间：2018-07-21 15:44

【摘要】：伴随着我国高速铁路建设的不断加快以及铁路列车的不断提速,高速铁路、城际快车已经成为越来越多商务人士的选择。用户对网络覆盖和网络质量提出了越来越高的要求,铁路覆盖已经成为各个运营商展现品牌的战场。在这种形势下,成都从2015年开始大力建设高铁LTE网络,力求引领4G生活,满足客户日益增长的数据业务通信需求,营造良好的市场环境,打造TD-LTE精品网络。结合成都地区实际情况,在建设TD-LTE基站过程中,一般的宏蜂窝基站由于配套齐全,空间大,天面条件好,在选址、规划、建设方面较为容易。而高铁覆盖基站由于受地理因素、干扰因素、列车运行速度等多个因素影响较大,相对而言建设难度较大。本文研究了国内外的TD-LTE研究的历史以及发展近况,以中国移动四川省4G第二批成绵乐高铁工程项目为例,进行了TD-LTE高铁覆盖方案研究与设计。论文首先简要介绍了TD-LTE结构、OFDM技术、MIMO技术,分析了高速环境影响无线系统传输性能因素,高铁移动网络信号覆盖的两个难题:多普勒频移和重叠覆盖距离,总结了高速覆盖解决方案算法。接着进行了TD-LTE覆盖性能分析、TD-LTE容量性能分析以及干扰协调及规避方法分析等。然后重点从项目的基本情况、覆盖指标和TD-LTE网络现状入手,分析并确定了本期工程覆盖规划方案,包含组网方式、频率选择、覆盖方案,小区合并与小区重叠覆盖距离、天线设置方案、站址设置方案以及ENODEB、天馈线系统的设备选型。最后从多普勒效应、切换影响、车体损耗三个方面提出了成都地区TD-LTE高铁覆盖问题,并进行了TD-LTE高铁覆盖规划优化分析,对该项目的TD-LTE网络的覆盖情况、铁路沿线的服务等级、铁路沿线的吞吐量覆盖进行了仿真。测试结果表明,设计方案达到了预期的目标。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.53

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