面向树形接入网络的可扩展IPTV视频传输质量监测方法研究

摘要

IPTV数据传输质量检测是IPTV应用部署中需要攻克的关键技术.目前,如何实现接入网中IPTV视频质量监测还缺少系统的研究.本文针对目前广泛采用的树形接入网拓扑,提出基于逐跳延时变化(PHDV)的视频传输质量检测和故障定位方法.该方法利用视频流实时性和连续性的特点,通过对交换机输出缓冲区队列长度变化的实时监测定位网络中影响IPTV视频传输质量的拥塞点.分析表明,本文提出的方法可扩展性强,监测逻辑在网络中部署实现简单,具有较强的实用价值.%IPTV data transport quality monitoring is one of the most important technologies that must be studied for the deployment of this application. According to the access network with tree topology, this paper proposes a new method for transport quality monitoring based on per-hop delay variation detection. With the real-time and continuous attributes of IPTV streams, this method can be used to measure the output port queue lengths and congestion points in a switch. Our analysis shows that this method is scalable and easy to be deployed in the network.