基于无线网络动态容量分析的延时QoS研究  

Study on delay based QoS with effective capacity via wireless network

作　　者：王宇[1] 王永生[1] 王立波[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《电路与系统学报》2011年第5期14-17,共4页Journal of Circuits and Systems

摘　　要：本文提出了基于信道动态容量分析数据包延迟超限率的方法,依据对信源队列分析和衰落信道动态容量计算,研究了基于延时的QoS保障仿真模型,并仿真了恒定速率视频业务在Rayleigh信道下数据包传输延迟特性。仿真结果表明,在有多普勒频率的时变衰落信道下,提出的方法能够有效估计数据传输的延迟超限率,为实时业务在时变衰落信道下的延时QoS提供了一种较好的分析方法。It is proposed a delay bound violation probability of transmitted packets analytical scheme via wireless fading channel using dynamic capacity.By utilizing queuing analysis and dynamic channel calculation,a QoS model and simulation on packet delay is performed for validating the constant bit rate video traffic via Rayleigh channel.Simulation results shows that,the propose scheme can effectively predict the delay violation probability of packet transmission via time varying channel with Doppler frequency which provides a good analytical method of delay relative QoS for real time traffic.

关 键 词：QOS 延迟超限率 动态容量 时变衰落信道 

分 类 号：TN914.5[电子电信—通信与信息系统]