【作者】 李伟；

【导师】 石文孝； 李春莉；

【作者基本信息】 吉林大学 ， 电子与通信工程， 2011， 硕士

【摘要】 经过四年的发展和网络建设,我国的第三代移动通信已经取得了长足的进步,在推动国民经济发展以及满足人民群众日益增长的物质文化需求发挥着越来越重要的作用。目前的移动通信已经不仅仅是人们沟通和交流的工具,在信息获取、个人娱乐、企业办公等领域,也显示出其强大的应用潜力。WCDMA作为第三代移动通信的一个重要分支,是目前世界范围最广泛的一种技术。我国由于WCDMA的建设只有短短四年,规模大、覆盖面积大,重点城市多,包括特大型城市、经济发达城市。WCDMA建设和优化的挑战,四句话“时间紧、规模大、优化艰、管理难。”本文通过丰富的理论与实践工作经验、利用各项优化手段使得WCDMA网络在PS业务中获得高质量和高效率的网络服务。对WCDMA网络中HSDPA原理及优化,HSUPA原理及优化,HSPA对数据业务的影响,双载波组网和优化等四个方面进行深入的优化。HSDPA系统指标优化主要从数据业务掉线率、接入性指标、话务量与吞吐率等方面入手加以分析;影响HSDPA路测速率的因素有:无线环境(弱覆盖或导频污染);传输误码;基站故障;传输、功率等资源受限都会导致HSDPA速率较低;干扰;终端或是服务器问题等。影响EUL的主要因素有:弱覆盖、导频污染、干扰、容量、用户权限等等,其关键技术主要为:多码传输、TTI=2/10ms、RBS中快速自动重传+软合并、快速调度等。HSPA+非全新技术,是HSPA的自然升级HSPA+采用更先进调制和调度技术,提供更快吞吐速率,在LTE到来前,保护HSPA网络投资和满足更大带宽需求。HSPA+(也被称为HSPA evolution)是HSPA技术的进一步演进,能够使频谱效率进一步提高,HSPA演进的目标是在相同带宽内达到与LTE相近的频谱利用效率。与LTE不同,HSPA+是对现有的WCDMA系统的平滑演进,主要是通过引入一些新的技术,对基于CDMA多址方式的HSDPA+HSUPA进行改进。HSPA+和现有的WCDMA有较强的兼容性,其网络部署的带宽同样为5MHz,采用的频段也是与现有WCDMA相同的频段,但在5MHz带宽下要达到和LTE相仿的性能。随着WCDMA用户的逐渐增多,需要在部分区域引入多载频技术,目的在于分层覆盖,吸收不同业务的话务量,提高不同业务用户的感知,同时针对不同业务(CS,PS),不同的网络位置区域(核心,边缘),调整和优化多载波策略以满足覆盖和业务的要求。更多还原

【Abstract】 After three years of development and network construction in China, the third generation of mobile communication has made great progress, in promoting the development of national economy and meet the people’s growing material and cultural needs of playing an increasingly important role in. The present mobile communication is not just people communicate and communicate, access to information, personal entertainment, business and other fields, but also shows its strong application potential.WCDMA as the third generation of mobile communication is an important branch, is currently the world’s most extensive scope of a technology. Because our country WCDMA building only three years, large scale, large covering area, key city, including the large city, economy developeds city. WCDMA construction and optimize the challenge, four words" time is tight, large size, difficult, difficult management optimization." The WCDMA data service is a Xiang Duan to the end of the service, the complete data business flow covering almost all the network nodes, and relates to a wireless network, core network, business network, terminal, each link problems will lead to abnormal data service performance. The key technology of WCDMA network directly determines the data service business ability, at the same time the wireless environmental quality directly influences the WCDMA data service capacity, therefore, this article will focus on the various WCDMA key technology research, to improve the WCDMA network for high speed data service capacity.This article through the rich theoretical and practical experience by means of optimization makes the WCDMA network in the PS business access to high quality and efficient network services. From the WCDMA network HSDPA principle and optimization, HSUPA principle and optimization of operations on the data, HSPA effect, double carrier network and optimize four aspects to conduct in-depth optimization.In the third generation mobile communication WCDMA system has be richly endowed by nature advantage and technological advantages, with the WCDMA network commercial work steadily, the number of users is increasing, the WCDMA wireless network optimization work is becoming more and more complex, we need to through unremitting efforts, continue to accumulate experience of optimizing, and constantly enrich themselves, improve their own network optimization ability, in order to adapt to the continuous development of network optimization technology. Mobile wireless network optimization involves disciplines increasingly, cause the system to optimize complex degree is also rising. Along with the telecommunication market competition is becoming increasingly fierce, competitive pattern is constantly changing, the network optimization work is more important. We only through continuous learning efforts, especially for new technology and new knowledge and knowledge, to keep up with the pace of the new technology. Through the network optimization of mobile communication, to continuously upgrade the quality of. Believe that the future of the mobile network optimization work will have a more broad development space and application.更多还原