服务质量论文：LTE系统一种基于比例公平的调度算法.doc

服务质量论文：LTE系统一种基于比例公平的调度算法【中文摘要】随着LTE(Long Term Evolution,长期演进)通信技术的发展和应用,未来定位业务、远程教育、远程办公、在线游戏、视频点播、音乐下载和移动电视等数据业务的涌现,接入网提供的服务已由单一的语音或数据业务向综合业务发展,不同类型业务对服务质量有不同的要求,这就造成了各种业务之间对于无线资源具有相互竞争的关系。在这种背景下,LTE下行链路中以提高分组业务服务质量,最大化系统公平性与效率为的资源调度,成为了一个有潜在应用前景和理论意义的研究热点。本文着重研究了LTE下行链路的调度算法,本算法考虑用户有一定的目标速率范围,并且每个用户的目标速率范围可以不同,使用户间的公平性限制在同类业务内,同时能提高系统吞吐量。文中首先分析了LTE系统调度的背景和发展现状;之后,简述LTE的标准化进程、关键技术和相关规范;接下来对现有的比较成熟的几种调度算法行了深入的研究,比较了它们的性能特点以及对于LTE新型多业务混合调度的局限性;最后提出本文中的新算法,并给出了相应的仿真结果,可以看到在性能上的一些提升,说明本算法在LTE系统中具有较好应用前景。【英文摘要】Both personal communication techniques and markets develop quickly with the application application of LTE(Long Term Evolution), which leads to the demand of data services, like positioning services, remote education, remote office, on-line game, music download and mobile TV, etc1. As networks provide services from single data or voice services to comprehensive business, different types of services have different requirements of QoS, which lead to the competing relationship among a variety of services for the wireless resources. In this case, the resource scheduling to improve service quality and increase the spectral efficiency in the long-term evolution downlink has become a potential application and theoretical research focus.This paper focuses on the LTE downlink scheduling algorithm, the algorithm considers the user has a certain target rate range, and each users target rate range can be different. So the situation that the high-flow users are limited has improved very well. In the first, this paper analyzes the background and current development of scheduling algorithm for the LTE system; In the second, describing the LTE standardization process, key technologies and related standards briefly; whats more, it studies several existed scheduling algorithms, compare their performance characteristics and application limitations; In the last, introducing a new algorithm and giving the relevant simulation results, we can see some improved performance. It indicates that this scheduling algorithm has its significance and superiority in the LTE system.【关键词】服务质量 频谱效率 调度 目标速率【备注】索购全文在线加好友：1.3.9.9.3.8848 同时提供论文写作一对一指导和论文发表委托服务【英文关键词】QoS spectral efficiency scheduling target rate【目录】LTE系统一种基于比例公平的调度算法摘要5-6Abstract6第一章 绪论9-141.1 研究背景9-101.2 国内外研究现状10-121.3 论文的章节安排12-14第二章 LTE 系统综述14-312.1 LTE 标准化进程15-172.2 关键技术17-222.2.1 多载波技术17-182.2.2 多输入输出技术18-192.2.3 分组交换192.2.4 干扰控制19-212.2.5 资源调度21-222.3 LTE 系统相关规范分析22-302.3.1 E-UTRAN 综述23-272.3.2 MAC 协议规范27-282.3.3 RLC 协议规范28-302.3.4 RRC 协议规范302.4 本章小节30-31第三章 典型的调度算法简介31-383.1 调度算法的目标31-323.2 最大载干比算法32-333.3 轮循算法33-343.4 比例公平算法34-363.5 M-LWDF 算法36-373.6 本章小节37-38第四章 LTE 仿真平台38-484.1 整体结构设计384.2 功能模块说明38-434.2.1 用户分布38-394.2.2 信道模型39-414.2.3 天线模型41-424.2.4 EESM 映射42-434.3 关键参量介绍43-454.4 仿真流程描述45-474.5 本章小节47-48第五章 新的LTE 调度算法