TD-LTE-Advanced系统无线资源分配算法研究

发布时间：2018-02-26 12:02

本文关键词： 移动通信 4G TD-LTE-Advanced 无线资源分配比例公平效用　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着移动终端技术和无线宽带接入技术的迅猛进步，人们对能够随时随地甚至在高速移动过程中都能便利地从互联网获取信息和服务抱有强烈愿望，并驱动了移动互联网技术的飞速发展。今年恰逢移动互联网元年，移动通信技术和互联网技术正在潜移默化同时又深刻地改变着人们的生活方式。由于全球手机用户的增长、运营商语音业务收入下降、网络成本升高以及WiMAX阵营的竞争，在3GPP（3rdGeneration Partnership Project，第三代合作伙伴计划）机构的组织下，LTE（Long Term Evolution，长期演进）项目应运而生，掀开了人类移动通信史上的伟大一章。LTE被广泛认为是3.9G移动通信技术，它分为TDD和FDD两个版本。众所周知，我国自主研发的3G技术TD-SCDMA取得了不俗的成就。中国真正的4G技术TD-LTE-A，再次体现了我国通信产业界自主创新能力。 TD-LTE-Advanced系统对峰值速率、频谱效率、延迟、移动性等重要技术指标提出了更高要求，相比于3G技术有了巨大飞跃。仅仅依赖物理层技术的提升是远远无法满足以上需求的，与此同时，高效的无线资源管理策略将对系统整体性能的提升提供重要帮助。因此，，对其中占有举足轻重地位资源分配算法进行研究是很有意义的。本文针对TD-LTE-Advanced系统，第一章首先陈述了移动通信技术发展历程、课题来源及研究意义，接着对LTE-A系统及现有资源分配算法进行了现状介绍。本文第二章阐述了在资源分配过程中所用到的理论基础和技术规范，并详细分析了系统分组调度过程。本文第三章是重点内容，设计了一种基于效用的上行资源调度算法，给出了具体系统模型，并进行了仿真结果分析及计算复杂度分析，得出了所给出算法优于现有算法的结论。第四章是本文另一个重点，我们设计了改进比例公平下行资源调度算法，相比于传统PF算法，它为低SINR用户提供了更好的服务。从用户的角度来看，与现有的比例公平算法相比，所给出的改进资源分配算法表现更好。
[Abstract]:With the rapid development of mobile terminal technology and wireless broadband access technology, people have a strong desire to be able to easily obtain information and services from the Internet anytime, anywhere and even during high-speed mobile processes. This year coincides with the first year of the mobile Internet, mobile communication technology and Internet technology is imperceptible at the same time profoundly changing people's way of life. As a result of the growth of mobile phone users worldwide, the decline in voice service revenues of operators, the rising network costs and the competition from the WiMAX camp, the long term Term Evolution Project has emerged under the aegis of the 3GPPP 3rd Generation Partnership Project. It opens a great chapter in the history of human mobile communications. LTE is widely regarded as 3.9G mobile communication technology, which is divided into two versions: TDD and FDD. TD-SCDMA, which has been developed independently in China, has made great achievements. The real 4G technology TD-LTE-Ain China has demonstrated the independent innovation ability of the communication industry in China again. The TD-LTE-Advanced system has put forward higher requirements for such important technical indicators as peak rate, spectrum efficiency, delay, mobility and so on. Compared with 3G technology, TD-LTE-Advanced system has made a great leap forward. Relying on the improvement of physical layer technology is far from meeting the above requirements. At the same time, efficient wireless resource management strategy will provide important help to improve the overall performance of the system. In this paper, for TD-LTE-Advanced system, the first chapter describes the development of mobile communication technology, the source of the subject and the significance of research. Then it introduces the current situation of LTE-A system and existing resource allocation algorithms. The second chapter describes the theoretical basis and technical specifications used in the process of resource allocation. In the third chapter, an uplink resource scheduling algorithm based on utility is designed, the system model is given, and the simulation results and computational complexity are analyzed. The conclusion is that the proposed algorithm is superior to the existing algorithms. Chapter 4th is another focus of this paper. We design an improved proportional fair downlink resource scheduling algorithm, compared with the traditional PF algorithm. It provides a better service for low SINR users. From the user's point of view, the proposed improved resource allocation algorithm performs better than the existing proportional fairness algorithm.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

【参考文献】