TD-LTE网络优化思路创新研究

发布时间：2018-01-27 10:03

本文关键词： TD-LTE TDD LTE 网络优化　出处：《山东大学》2017年硕士论文　论文类型：学位论文

【摘要】：LTE(LongTerm Evolution)即长期演进,与3G技术相比,不但可以将用户的上网速率由原来的1.5M左右提升到100M,而且能够在时延、误码率等方面增强用户的感知效果,随时随地的和任何终端进行联系是移动通信发展的最终追求[1]。移动通信已迈入4G时代,"智慧城市"、"万物互联"、"超脑工程"等等新兴产业的崛起无不依赖着无线网络的发展,而TD-LTE的发展水平与质量便直接影响着全球无线互联网的发展进程。3G时代主要使用的是CDMA技术,而TD-LTE则采用的是Orthogonal Frequency Division Multiplexing(OFDM)技术、Multiple-Input Multiple-Output(MIMO)技术[2]、高阶调制技术以及网络架构扁平化等多项前沿技术,其中OFDM系统可以将一条高速度高带宽的数据流分割成多条并行[3]的窄带数据流,MIMO技术能够实现在多个相互独立的通道上进行多路空间传输,可以获得更高的传输速率和更可靠的传输质量。高阶调制技术可以将3G系统中的频谱使用效率提升一半,这是因为它的最高调制为64QAM,即每个调制符号比3G系统中可多携带2比特信息。频域多址技术可以更加灵活的处理多个系统宽带。频域调度可以通过OFDMA实现,而CDMA无法实现。HARQ融合了自动重传的高稳定性和FEC的高效性。对于小区干扰,有更加灵活的方法提供相应的抑制或解决效果。论文的具体工作如下:1、分析研究了 TD-LTE网络的关键技术及技术特征,从规划建设、优化特点、网络集中优化管理等方面详细阐述了 TD-LTE网络优化的新思路。2、调查研究了 TD-LTE网络的发展背景及关键技术。3、介绍了 TD-LTE网络在规划建设环节中,宏站和室分站的规划思路。并阐述了 TD-LTE网络基于多网协同建设的规划思路。4、研究了 TD-LTE网络主要优化的内容及相关考核指标。并从初始优化、单站验证、蔟优化及专项优化等方面提出了新的思路。5、提出了网络集中优化管理系统,并从实施流程、内容及主要工作等方面进行了详细阐述。6、结合实际TD-LTE网络优化案例,从七个不同类别的网络问题出发,提出了具体的优化方案,并进行了现场实测,用实际指标验证TD-LTE网络优化后给用户体验带来的良好感知。7、最后,对本文工作做了总结,对TD-LTE网络发展以及基于无线网络的智慧城市及相关行业发展进行了展望。
[Abstract]:LTE(LongTerm Evolution is a long-term evolution, compared with 3G technology, not only can users access the Internet rate from 1.5m to 100m. Moreover, it is the ultimate pursuit of the development of mobile communication to enhance the perceived effect of the user in the aspects of delay, bit error rate and so on, and contact with any terminal at any time, anywhere and at any time. [1. Mobile communication has entered the 4G era. The rise of new industries, such as "smart city", "interconnection of everything", "superbrain engineering" and so on, all depend on the development of wireless network. The development level and quality of TD-LTE will directly affect the development of the global wireless Internet. 3G era is the main use of CDMA technology. TD-LTE uses Orthogonal Frequency Division Multiplexing OFDM (OFDM) technology. Multiple-Input Multiple-Output Mimo technique. [2, high order modulation technology and flat network architecture, among which OFDM system can divide a high speed and high bandwidth data stream into multiple parallel. [3) the narrowband data stream MIMO technology can realize multi-channel spatial transmission on multiple independent channels. Higher transmission rate and more reliable transmission quality can be achieved. High-order modulation technology can increase spectrum efficiency in 3G system by half because its maximum modulation is 64QAM. That is, each modulation symbol can carry 2 bits more information than in 3G system. Frequency domain multiple access technology can deal with multiple systems more flexibly. Frequency domain scheduling can be implemented through OFDMA. However, CDMA can not realize. HARQ combines the high stability of automatic retransmission and the high efficiency of FEC. There are more flexible methods to provide the corresponding inhibition or solution effect. The specific work of this paper is as follows: 1. The key technologies and technical characteristics of TD-LTE network are analyzed and studied, from the planning and construction, optimization characteristics. This paper expounds the new idea of TD-LTE network optimization in detail from the aspects of centralized network management, and investigates the background and key technology of TD-LTE network. This paper introduces the planning ideas of macro station and branch station in the planning and construction of TD-LTE network, and expounds the planning thinking of TD-LTE network based on multi-network cooperative construction. This paper studies the main optimization contents and relevant assessment indexes of TD-LTE network, and puts forward a new idea of 5. 5 from the aspects of initial optimization, single station verification, cocooning optimization and special optimization. Put forward the network centralized optimization management system, and from the implementation process, content and main work and other aspects of detailed elaboration. 6, combined with the actual TD-LTE network optimization case. Based on the seven different network problems, this paper puts forward the specific optimization scheme, and carries out the field measurement, and verifies the good perception of the TD-LTE network optimization to the user experience by using the actual indicators. Finally, the work of this paper is summarized, and the development of TD-LTE network, intelligent city based on wireless network and related industries are prospected.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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