CDMA与LTE双网室内分布系统组网与优化研究

发布时间：2018-07-24 19:34

【摘要】：4G网络建设已经成为国家信息化产业发展的重要战略之一,全国各电信运营商都正在大规模建设4G-LTE网络。室内分布系统作为移动网络全覆盖的重要手段,中国电信在3G时代就已经大量铺设。随着LTE-FDD网络的建设,CDMA与LTE-FDD两种具有不同覆盖能力和业务场景的网络将长期共存。因此,LTE-FDD与已有CDMA的室内双网组建与工程优化研究,正被越来越多的人关注。本文首先从CDMA与LTE双网室内分布系统的三种组网模式出发,基于空间损耗模型、链路预算模型计算出CDMA与LTE-FDD的室内天线覆盖半径;通过对系统间杂散、阻塞、互调干扰的理论分析,确定系统间频率干扰。针对室内分布的弱覆盖、信号外泄、互干扰、小区切换和传输速率等问题,提出了CDMA与LTE-FDD双网室内分布系统的组建和专项优化策略,并在衡阳地区中国电信的双网室内分布系统的前期网络测试、双网设计与组建、系统优化和后期验收等过程中进行实施和验证。本课题的完成,为4G网络室内分布的工程实践提供了可依循原则和优化方法,为电信运营商有效利用原有室内分布系统,节约能耗及节省成本提供了切实可行的技术手段,具有广阔的应用前景。
[Abstract]:The construction of 4G network has become one of the important strategies in the development of national information industry. All telecom operators in China are building 4G-LTE network on a large scale. Indoor distribution system as an important means of mobile network coverage, China Telecom has been laid in the 3G era. With the construction of LTE-FDD network, two kinds of networks with different coverage capability and service scenario will coexist for a long time. Therefore, LTE-FDD and the existing CDMA indoor double network construction and engineering optimization research, is being paid more and more attention. Based on the spatial loss model and link budget model, the indoor antenna coverage radius of CDMA and LTE-FDD is calculated from the three networking modes of CDMA and LTE indoor distribution systems. The frequency interference between systems is determined by theoretical analysis of intermodulation interference. Aiming at the problems of indoor distribution, such as weak coverage, signal leakage, mutual interference, cell switching and transmission rate, this paper puts forward the construction and special optimization strategy of indoor distribution system of CDMA and LTE-FDD double networks. And it is carried out and verified in the Prophase network test, design and construction of double network, system optimization and later acceptance of Hengyang China Telecom's double-network indoor distribution system. The completion of this project provides the following principles and optimization methods for the engineering practice of 4G indoor distribution, and provides a practical technical means for telecom operators to make effective use of the original indoor distribution system and to save energy consumption and cost. It has broad application prospect.
【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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