[信息与通信工程]TD-SCDMA无线网络规划方法研究 摘 要在我国,目前已经拥有了全球最大的移动通信网和最大的移动用户数,移动用户的数量已经超过4亿,而且这个数字还将快速增长。现有的第二代移动通信系统无论是在频谱资源,还是在所能提供的业务方面,都已经不能满足移动通信用户的需求。本文所讨论的TD-SCDMA是一项完全由我国自主研究的3G技术,论文中将从TD-SCDMA的技术特点、无线网络规划流程、覆盖和容量规划、组网方案和小区规划、以及TD-SCDMA与其他移动通信系统间的干扰及协调这几个方面来进行讨论。其中对于覆盖和容量规划将在理论方法上进行较为详细地论述;而与其它系统间的干扰问题将通过与WCDMA网络间的干扰分析来进行。在文章的最后,将通过对自己亲身参与的部分规划工作的叙述来对本论文做一个结束,这个也是本论文中对于自己在实践中所学比较全面的总结。关键词:TD-SCDMA,覆盖规划,容量规划,链路预算,干扰分析 ABSTRACTMobile subscriber's rate of rise goes far beyond the fixed telephone user's rate of rise in our country and even the At present already we had the global biggest migration communications network in our country and the biggest mobile subscriber number,and mobile subscriber's quantity already approached four hundred million, moreover this number also is growing The existing second-generation mobile communication system regardless of is in the frequency spectrum resources or in the service aspect which can provide,all already could not satisfy the mobile communication service development Here what the article discusses is the technology of TD-SCDMA which is completely and independently studied by our country,we will study technical characteristic of TD-SCDMA,wireless network planning flow,cover and capacity planning,network plan and plot plan,disturbance and coordination with other mobile communication system For coverage and capacity planning which will be carried out the theoretical methods exposition in more As for the issue of interference with other systems,we will talk about it with the WCDMA In the final article, through my personal involvement in the planning process to make a conclusion, the present paper is to practice what I have learnt in my comprehensive KEY WORDS: TD-SCDMA, cover planning, capacity planning, link budgeting, disturbance analysis 目 录前 言 - 1 -第1章 第三代移动通信标准的发展[1][5][6] - 2 -1 第三代移动通信的三大主流标准 - 2 -2 TD-SCDMA标准的形成 - 3 -第2章 TD-SCDMA技术概述[3][5] - 6 -1 TD-SCDMA简介 - 6 -2 TD-SCDMA采用的主要技术 - 7 -1 智能天线技术 - 7 -2 综合采用各种多址方式 - 9 -3 同步CDMA - 10 -4 联合检测(Joint Detection)技术 - 11 -5 接力切换(Baton Handoff) - 14 -6 动态信道分配(DCA) - 15 -第3章 TD-SCDMA无线通信系统网络规划[4][8][10][11] - 18 -1 无线网络初步规划的流程 - 18 -2 TD-SCDMA无线网络规划的内容及流程 - 19 -3 TD-SCDMA网络覆盖规划 - 21 -1TD-SCDMA 覆盖规划理论准则 - 21 -2 TD-SCDMA覆盖规划的链路预算方法 - 23 -4 TD-SCDMA网络容量规划 - 27 -1 TD-SCDMA 的容量规划流程 - 28 -2 TD-SCDMA容量规划预算的数学模型 - 30 -第4章 TD-SCDMA的组网[2][7][9][12][13] - 33 -1 TD-SCDMA独立组网 - 33 -1 TDD-TSM 向TDD-LCR的演进方案 - 33 -2 覆盖方式分析 - 34 -3 终端移动速度分析 - 36 -2 TD-SCDMA与WCDMA网络联合组网 - 36 -1 双网切换 - 37 -2 网间漫游 - 38 -3 网络版本 - 38 -3 组网方案 - 39 -4 TD-SCDMA与WCDMA混合组网干扰分析 - 40 -1 邻频干扰分析原理 - 41 -2由ACIR计算WCDMA系统容量损失的方法 - 41 -3 TD-SCDMA BS 对 WCDMA BS干扰分析 - 43 -第5章 罗沙岛的两种建站方案 - 49 -总 结 - 53 -致 谢 - 55 -参考文献 - 56 -附 录A 中文翻译 - 57 -附 录B 英文原文 - 63 -
目录 中文摘要 I ABSTRACT II 1 引言 1 1 课题背景 1 1 移动通信行业发展 1 2 CDMA技术的发展现状 1 2 本课题研究的目的和意义 2 3 本课题研究的主要内容 3 2 基本原理 4 1 CDMA基本概念 4 2 DS-CDMA的关键技术 4 1 功率控制技术 4 2 PN码技术 5 3 RAKE接收技术 5 4 软切换(Soft Handoff)技术 5 3 CDMA网基本结构系统 7 3 CDMA无线网络优化流程和方法 8 1 CDMA无线网络优化概述 8 2 CDMA无线网络优化的发展 8 3 CDMA无线网络优化的分类 9 1 工程优化 9 2 运维优化 10 4 CDMA无线网络优化的通常流程 10 5 CDMA无线网络优化的方法 12 6 CDMA无线网络优化的主要内容 13 1 优化准备工作 13 2 现场测试 14 3 CLUSTER级的调整和优化 14 4 系统级优化(有负载) 15 4 CDMA网络优化典型案例分析 16 1 CDMA无线掉话常见原因分析及优化 16 1 处干覆盖范围以外的掉话 16 2 导频污染引起的掉话 18 3 前反向链路不平衡引起的掉话 19 4 干扰引起的掉话 20 2 CDMA网络中切换问题 21 1 硬切换 21 2 软切换及更软切换 22 3 典型案例分析 25 3 总结 28 5 结束语 29 致谢 30 参考文献 31中文摘要 CDMA是为满足现代移动通信网在大容量、高质量、综合业务、软切换、国际漫游等方面的要求而设计的一种先进移动通信技术,它具有抗干扰性好,抗多径衰落,保密安全性高等诸多优点。CDMA网络是中国电信的主推品牌,CDMA2000 (3G)业务的发展直接影响到中国电信的成败,而CDMA业务的发展必须依赖完善的网络才能顺利进行。因此,CDMA系统在运营过程中需要不断地进行网络优化,一是为了能够给系统当前的用户提供更加优质的服务,二是为了提高系统容量,以接纳越来越多的系统未来用户。 本文的研究目标是对投入运行的网络进行参数采集、数据分析,找出影响网络运行质量的原因,通过技术手段或参数调整使网络达到最佳运行状态的方法,使网络资源获得最佳效益,同时了解网络的增长趋势,为扩容提供依据。具体的网络优化主要包括以下几方面内容: 网络覆盖问题;掉话问题;二次呼叫问题;越区切换问题;与其他网络手机用户的互连互通等。 本课题主要研究CDMA无线通信网络中掉话和切换问题的分析和优化。通过对覆盖区基本情况、网络覆盖、质量、话务的分析,应用现有理论和技术,在前期工程的基础上为完善CDMA网络的覆盖并优化网络,提出切实可行的设计方案。使得网络容量、质量、经济效益、竞争力达到预期设定的目标值,最终满足客户市场的需求。 关键词:无线网络优化、CDMA、掉话问题、软切换技术等ABSTRACT CDMA is a kind of advanced mobile telecommunication technology, which fulfill great capacity and quality、synthetical operation、soft switch and international It possesses lots of merits such as repellence of interference and attenuation of multiple The security is also great trait of CDMA CDMA is the main operation that China Unicorn extend The progress of CDMA right result in the success of China Unicom,and the development of operation must depend on perfect Therefore, in the process of management, it is completely necessary to optimize CDMA wireless network constantly On the one hand, the purpose of optimizing CDMA wireless network is to provide more consummate service, and on the other hand, it is to extend system capacity in order to take up more and more The purpose of this task is to investigate the best methods that can optimize CDMA wireless network by collecting data of network which is in operation and analyzing the data in order to find the cause which influences the quality of the The advantage of CDMA is application of power control and soft switch, so they are usually the emphases during base station On the other hand, data optimizing is also important and Concretely, methods of optimizing are as following: l、the issue of network coverage 2、dropped calls problem 3、the second call issues 4、handoff issues 5、with other network users, such as the The main research topics of CDMA wireless communications network are dropped calls and switching analysis and Covered by the basic situation of the district, network coverage quality and traffic Applying of existing theory and technology, the basis of pre-engineering to improve the coverage of CDMA networks and optimized networks is practical Makes network capacity, quality, cost-effective, competitive edge to achieve the desired target set, and ultimately meet customer needs of the Keywords: wireless network optimization, CDMA, th