TD-LTE室内分布系统的研究

发布时间：2018-11-15 09:31

【摘要】：LTE是一个纯数据网络，实现了语音、数据的包交换传输。LTE网络具有网络带宽的动态配置功能，带宽大小可以为1.4MHz、3MHz、5MHz、10MHz、15MHz和20MHz，并且LTE具有单次传输的动态资源分配能力，，能按照用户业务需求和网络的资源占用情况进行资源的合理分配，更好地满足用户的语音、数据、多媒体等多样化业务的需求。现阶段，物联网、互联网技术蓬勃发展，交互类业务、多媒体类业务应用更趋广泛，智能终端无论在处理速度还是用户感官上均实现了质的飞越，加上LTE具有的高带宽、高频谱资源利用率、高速率等优点，共同驱动了用户对移动宽带的渴望，传统的语音业务不再满足用户的通信需求，用户更亲睐于形式多样、方便快捷、操作简易的数据业务。据咨询机构预测，2016年全球通过移动网络使用的数据业务相较于2013年将增长15倍，数据业务的比重将远远超过语音业务的占有量，占到业务总量的70%。而移动通信中，超过80%的业务量将发生在室内。目前，我国三家运营商基本实现了室外的广域覆盖，进行网络深度覆盖，提高室内网络覆盖质量，成为提高运营商市场竞争能力、提升企业效益、巩固市场占有率并实现自身可持续发展的根本前提。但目前运营商室内分布系统建设时存在以下问题：（1）现网室内分布系统的测试合格率较低，部分站点存在信源脱网、分布系统故障等问题；（2）A类建筑的覆盖率偏低，其中A类非住宅区域的覆盖率为86.86%，A类住宅区域的覆盖率为63.78%；（3）2G、3G、4G、WLAN四网共存，各网各建一套室内分布系统将增加建设成本，浪费建造资源；（4）多网共存条件下，缺乏可操作性强的LTE室内分布系统建设方案，限制了多网下网络规划的可操作性。本文在多网协同的基础上，分析2G、3G室内分布系统建设方法与建设实例，对TD-LTE系统的室内分布系统设计进行了系统的研究。首先，针对XX地市本文总结了3G室内分布系统的覆盖比例、话务量吸收比例以及室分建设网络类型，并分析了现阶段室内分布系统的业务需求、存在的问题、建设必要性和建设重点。其次，本文对室内分布系统无线链路预算、传播损耗模型和室内分布规划方法进行了研究。并在此基础上，对XX地市皇家花园酒店室内分布系统进行实际设计，设计内容包括信源设计、系统设计、天馈系统设计和系统设备布局等，详细研究了各步骤的设计内容和重点关注指标。最后，本文测试了皇家花园酒店室内分布系统的覆盖质量、FTP上行\下行速率、业务连接成功率、室内信号外泄情况等技术指标，验证了所提方案的可行性。
[Abstract]:LTE is a pure data network, which realizes packet switching transmission of voice and data. LTE network has the function of dynamic configuration of network bandwidth, and the bandwidth can be as large as 1.4 MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz, respectively. Moreover, LTE has the ability of dynamic resource allocation for single transmission, which can allocate resources reasonably according to the user's needs and the resource occupation of the network, so as to better meet the needs of various services such as voice, data, multimedia and so on. At present, the Internet of things, Internet of things technology is booming, interactive services, multimedia services are more widely used, intelligent terminals both in processing speed and user senses to achieve a qualitative leap, plus the LTE has a high bandwidth, The advantages of high spectrum resource efficiency and high speed together drive the desire of users for mobile broadband. The traditional voice services no longer meet the communication needs of users. The users prefer the data services which are diversified convenient and easy to operate. Global data traffic over mobile networks will grow 15 times in 2016 compared with 2013, and the proportion of data services will far outweigh voice services, accounting for 70 percent of the total, according to the consultancy. In mobile communication, more than 80% of the traffic will occur indoors. At present, our country's three operators have basically realized the outdoor wide area coverage, carried on the network deep coverage, improved the indoor network coverage quality, has become the enhancement operator market competition ability, enhances the enterprise benefit, Consolidate market share and realize its own fundamental premise of sustainable development. However, there are the following problems in the construction of indoor distribution system: (1) the qualified rate of indoor distribution system is low, and some stations have some problems such as the information source, the fault of distribution system and so on; (2) the coverage of A-type buildings is low, and the coverage of A-type non-residential areas is 86.86 and the coverage of A-type residential areas is 63.78; (3) 2G / 3GN / 4GN WLAN co-exist, each network will build a set of indoor distribution system which will increase the cost of construction and waste construction resources; (4) under the condition of coexistence of multiple networks, there is a lack of operable LTE indoor distribution system construction scheme, which limits the maneuverability of multi-network planning. On the basis of multi-network cooperation, this paper analyzes the construction methods and examples of 3G indoor distribution system of 2GN, and makes a systematic study on the design of indoor distribution system of TD-LTE system. First of all, this paper summarizes the coverage ratio of 3G indoor distribution system, the proportion of traffic absorption and the types of indoor construction network for XX, and analyzes the business requirements and existing problems of the current indoor distribution system. The necessity of construction and the key points of construction. Secondly, the wireless link budget, propagation loss model and indoor distribution planning method of indoor distribution system are studied in this paper. On this basis, the actual design of XX Royal Garden Hotel indoor distribution system, including information source design, system design, sky feed system design and system equipment layout, etc. The design content and key concerned index of each step are studied in detail. Finally, the paper tests the coverage quality of Royal Garden Hotel indoor distribution system, FTP uplink / downlink rate, service connection success rate, indoor signal leakage and so on, and verifies the feasibility of the proposed scheme.
【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

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