WiMAX接入技术在IPTV系统中的应用研究

在分析IPTV接入网的要求和WiMAX技术优势的基础上,提出了WiMAX应用于IPTV的系统模型,并具体分析了系统流程;针对IPTV业务下行数据量比较大的特点,提出了适合IPTV业务特点的下行链路实时调度(DLRTS)算法,该算法的主要目的在于降低实时业务的时延,从而保证IPTV的服务质量(QoS)。仿真结果表明,与常用的轮叫调度(Round R0bin)算法相比,本文算法在实时业务的时延和吞吐量两方面的性能都有明显提高,可很好地支持IPTV业务。

Study on the application of WiMAX access technology in IPTV system

Based on the analysis of demands of IPTV access networks and advantages of WiMAX technology,a system model for IPTV over WiMAX was proposed and the system procedure was analysed in detail.Considering the heavy traffic in downlink direction of IPTV services,this paper proposed a downlink real-time scheduling(DLRTS) algorithm which aims at decreasing the delay of real-time traffic,thus meeting requirements of IPTV's QoS.Simulation result shows that,compared to round-robin scheduling algorithm,DLRTS improves the performance both in delay and throughput,thus can be competent for IPTV services.