TD-LTE网络建设方案研究

发布时间：2018-05-26 17:33

本文选题：TD-LTE + 覆盖　；参考：《吉林大学》2014年硕士论文

【摘要】：随着数据业务量的爆炸式增长，网络利用率不断攀升，受TD-SCDMA产业链规模能力、技术特性等的影响，TD-SCDMA在传输速率、运营成本、覆盖成本、用户体验、无线带宽等方面同竞争对手相比，均存在明显的劣势。因此，尽快将TD-SCDMA网络向TD-LTE网络演进，真正有效地建立起TD系统在未来的宽带移动市场、移动互联网市场、物联网市场的竞争力，是中国移动新时期应对竞争、保持技术领先优势的重要举措。本文通过对现有GSM网和TD-SCDMA网所能承载业务的能力、各网已建设基站数量及覆盖范围等情况的调查和分析。根据TD-LTE的业务特点，结合目前网络承载业务的发展情况，对业务进行合理分析及预测。科学预测话务分布，合理布局网络，均衡话务量，结合四网协调发展策略，得出TD-LTE网络需要建设的重点区域及预计承载的业务量。并对TD-LTE网络架构及几个关键技术进行了深入研究，在此基础上，结合LTE试验网的经验数据确定TD-LTE网络的建设原则。主要研究内容如下：在确定规划区域及覆盖要求的基础上，通过对现网数据业务分析找出数据业务热点区域，结合覆盖质量目标来确定TD-LTE网络建网初期的网络覆盖方案。并对现网站址进行系统外干扰排查及分析，发现高干扰风险基站，提出具体的规避措施，以确定TD-LTE网络频率的使用方案。根据电波传播模型来计算TD-LTE基站的覆盖半径，最终得出TD-LTE网络建设方案。根据网络扩容、特殊场景及技术演进的需求，确定天线使用方案。通过网络规模估算，确定区域内需要建设的基站数目及其基站位置。完成初步的站址规划后，将站址规划方案输入到TD-LTE规划仿真软件中进行覆盖及容量仿真分析，通过仿真分析输出结果，进一步评估目前建设方案是否可以满足覆盖及容量目标，如部分区域不能满足要求，则需要对建设方案进行调整修改，使得建设方案最终满足规划目标的要求。最终总结出可行的TD-LTE网络建设方案。 TD-LTE在网络建设时还需要考虑TD-SCDMA系统现网实际部署情况，，不仅要借鉴现有系统的规划方案，因地制宜规划建设TD-LTE网络，还需要兼顾系统间的共存与运营平衡问题，力求在网络建设方案上达到优良性能与低廉成本的完美结合。本文的研究工作和成果为TD-LTE网络建设提供了技术参考，具有理论和实际工程意义。
[Abstract]:With the explosive growth of data traffic, the network utilization rate is increasing, and TD-SCDMA is affected by the TD-SCDMA industry chain scale capability, technical characteristics and so on in the transmission rate, operation cost, coverage cost, user experience, etc. Wireless bandwidth and other aspects compared with competitors, there are obvious disadvantages. Therefore, developing TD-SCDMA network to TD-LTE network as soon as possible and establishing the competitiveness of TD system in the future broadband mobile market, mobile Internet market and Internet of things market is the competition of China Mobile in the new era. An important move to maintain a leading edge in technology. This paper investigates and analyzes the capacity of the existing GSM and TD-SCDMA networks to carry services, the number and coverage of the base stations that have been built in each network. According to the characteristics of TD-LTE service and the development of network bearer service at present, the service is analyzed and forecasted reasonably. Scientific prediction of traffic distribution, rational distribution of network, balanced traffic, combined with the coordinated development strategy of four networks, the key areas to be constructed and the traffic volume expected to be carried by TD-LTE network are obtained. The TD-LTE network architecture and several key technologies are deeply studied. On the basis of this, the construction principle of TD-LTE network is determined by combining the empirical data of LTE experimental network. The main contents of the study are as follows: On the basis of determining the planning area and the coverage requirement, the hot spot area of the data service is found through the analysis of the existing network data services, and the coverage scheme in the initial stage of the TD-LTE network construction is determined by combining the coverage quality target. In order to determine the frequency of TD-LTE network, this paper investigates and analyzes the current site, finds out the base station with high interference risk, and puts forward some concrete measures to avoid it. The coverage radius of TD-LTE base station is calculated according to the radio wave propagation model, and finally the TD-LTE network construction scheme is obtained. According to the requirements of network expansion, special scenarios and technological evolution, the antenna usage scheme is determined. The number of base stations to be built and the location of the base stations in the region are determined by estimating the network size. After the initial site planning is completed, the site planning scheme is input into the TD-LTE planning simulation software for coverage and capacity simulation analysis. Through the simulation analysis of the output results, it further evaluates whether the current construction plan can meet the coverage and capacity objectives. If part of the area can not meet the requirements, it is necessary to adjust and modify the construction plan, so that the construction plan can meet the requirements of the planning objectives. Finally, the feasible scheme of TD-LTE network construction is summarized. TD-LTE also needs to consider the actual deployment of TD-SCDMA system in network construction, not only drawing lessons from the existing system planning scheme, planning and building TD-LTE network according to local conditions, but also taking into account the coexistence and operational balance between systems. In the network construction program to achieve good performance and low-cost perfect combination. The research work and results of this paper provide a technical reference for the construction of TD-LTE network, and have theoretical and practical engineering significance.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

【参考文献】