多载波系统中多业务QoS保障的跨层传输方法  

A cross-layer method for multi-traffic with QoS guarantee in multi-carrier wireless systems

作　　者：刘建[1] 朱光喜[1] 李黎[1] 王玲[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2008年第7期1-4,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2006AA01Z277);国家自然科学基金资助项目(60496315)

摘　　要：基于多载波信道容量最大化需求以及多业务混合传输的特性与质量要求,提出一种综合考虑保证媒体业务的QoS(quality of service)和最大化传输效率的BCMEP(best channel for most emergent packet)算法.该算法根据多载波系统各个子载波的信噪比水平和性能需求,结合链路层中业务包时延特性以及发送与接收窗口信息,对发送窗口中各个业务包按照BCMEP算法进行调度,从而达到兼顾媒体业务传输质量和最大化传输效率的目的.仿真结果表明,相比单纯注水算法和AMC(adaptive modulation and coding)算法,BCMEP算法在最大化系统吞吐量的同时,还能保障媒体业务QoS.A cross-layer method named BCMEP（best channel for most emergent packet） is developed for multi-traffic transmission with QoS（quality of service） guaranteed on multi-carrier system,based on the requirements of maximizing the channel capacity and the features of multi-traffic transmission.The physical channel quality and the data link layer states information are considered conjointly when each packet is scheduled in slide windows to sub-carriers based on BCMEP algorithm.It aims to maximize the throughput of the multicarrier wireless system with multi-traffic QoS guaranteed.The simulation results show that the BCMEP performs better in maximizing the throughput of the system with QoS guaranteed for multi-media traffics compared with pure water filling and AMC（adaptive modulation and coding） methods.

关 键 词：多载波系统 跨层自适应 多业务 服务质量 容量 

分 类 号：TN929.5[电子电信—通信与信息系统]