【作者】 陈铭铭；

【导师】 何晨；

【作者基本信息】 上海交通大学 ， 通信与信息系统， 2007， 硕士

【摘要】 未来移动通信系统将朝着通信速率更快,终端和网络设备更加智能化,无线频谱利用效率更高,网络兼容性能更平滑的方向发展,目标是实现高传输速率的宽带无线通信系统。正交频分复用(OFDM)技术作为B3G无线通信领域的新技术,具有良好的抗多径干扰能力以及频谱利用率高的特点。随着数据服务和多媒体应用的飞速增长,无线网络要求能够满足各种业务的QoS服务需求,而无线分组调度作为系统无线资源管理的最核心技术之一,成为保障整个系统性能的关键一环,很大程度上决定着系统的频谱利用效率。而无线链路的复杂性和宽带通信系统的QoS需求带来的新特性,对于无线分组调度设计提出了更高层次的要求。本论文主要研究基于OFDM技术的宽带无线通信系统的多业务下行分组调度算法。首先,作者在研究分析比例公平(PF)算法特性的基础上,利用最大传输速率、比例公平因子将比例公平性有效的实现到系统中,力图在维持系统高吞吐量的同时实现用户公平性;引入累积服务时延指数,其中,既利用传统的服务流等待时间作为参数,实现对于服务时延的限制,提高传输时延性能,又利用用户服务流已获得服务资源的累积值,通过该值记忆特性实现各用户流量的自适应补偿,体现长期公平性;在每个调度帧中采用资源块及用户相关的多维判决方法。提出一种能够实现自适应补偿的累积服务时延比例公平调度(DCPF)算法。该更多还原

【Abstract】 The future of mobile communication systems will be in the trend of having a faster communication speed, more intelligent terminals and network facilities, higher spectrum efficiency and more compatible network. It will become a wideband system carrying out high data rate.Orthogonal Frequency Division Multiplexing (OFDM) becomes as a promising technology in beyond 3rd generation wireless communication system, which has the characteristic of multi-path resistance and high spectrum efficiency. Along with the booming of data service and multi-media application, wireless network has various Quality of Service requirements. The wireless packet scheduling algorithm is one of the key technologies in resource management. It will become the most important approach in realizing high spectrum efficiency and fulfilling high system capability. Meanwhile, the complexity of wireless channel and QoS requirement in wideband system have brought in new properties, and push forward higher demand in the designing of wireless scheduling algorithm.This thesis mainly focuses on the author’s research in the field of downlink packet scheduling algorithms for wideband wireless communication system with diversified traffic flow on the basis of OFDM technology. Firstly, the author defines the maximum transferring rate and the proportional fairness factor based on the analysis of proportional fairness property; imports a concept of exponential cumulated delay, which makes use of the waiting time of each traffic flow to restrict the service delay and the cumulated value for adaptive compensation; makes judgment on multi-dimensional of time, frequency and user in each scheduling frame. Finally, the thesis proposed a Delay Cumulated Proportional Fairness (DCPF for short) algorithm, which更多还原