摘要
交互式IP电视(IPTV)是一种宽带交互的新媒体,IPTV系统服务质量(QoS)的提升对IPTV的推广和发展具有重要意义.根据IPTV业务对承载网络的带宽和QoS的需求,并且结合全球微波互联接入(WiMAX)系统的调度策略,提出了一种改进的调度算法,来保证IPTV中不同业务的QoS需求.为满足实时业务时延要求,改进的调度算法通过计算不同业务流的权重,来保证实时业务的调度优先权.实验结果表明,此方法在吞吐量和时延方面的性能都有较大的改进,提升了IPTV系统QoS性能.
IPTV is interactive internet protoeol TV.The enhancement of QoS is of great significance for the promotion and development of IPTV.Considering the Quality of Service in IPTV system and the scheduling algorithm of WiMAX,this paper proposes an improved scheduling algorithm,which aims at meeting requirements of IPTV＇s QoS.To decrease the delay of real-time traffic,the weight of different business is calculated,which ensures the priority of real-time business.Simulation result shows that the policy has good performance in delay and throughput.It can promote the QoS performance of IPTV system.
出处
《湖南工程学院学报（自然科学版）》
2011年第4期46-49,共4页
Journal of Hunan Institute of Engineering(Natural Science Edition)
基金
安徽省自然科学研究资助项目(KJ20112070)
安徽科技学院青年科研资助项目(ZRC2011271)
