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首页> 外文期刊>IEEE transactions on multimedia >A Measurement Study of a Large-Scale P2P IPTV System
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A Measurement Study of a Large-Scale P2P IPTV System

机译：大型P2P IPTV系统的测量研究

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摘要

An emerging Internet application, IPTV, has the potential to flood Internet access and backbone ISPs with massive amounts of new traffic. Although many architectures are possible for IPTV video distribution, several mesh-pull P2P architectures have been successfully deployed on the Internet. In order to gain insights into mesh-pull P2P IPTV systems and the traffic loads they place on ISPs, we have undertaken an in-depth measurement study of one of the most popular IPTV systems, namely, PPLive. We have developed a dedicated PPLive crawler, which enables us to study the global characteristics of the mesh-pull PPLive system. We have also collected extensive packet traces for various different measurement scenarios, including both campus access networks and residential access networks. The measurement results obtained through these platforms bring important insights into P2P IPTV systems. Specifically, our results show the following. 1) P2P IPTV users have the similar viewing behaviors as regular TV users. 2) During its session, a peer exchanges video data dynamically with a large number of peers. 3) A small set of super peers act as video proxy and contribute significantly to video data uploading. 4) Users in the measured P2P IPTV system still suffer from long start-up delays and playback lags, ranging from several seconds to a couple of minutes. Insights obtained in this study will be valuable for the development and deployment of future P2P IPTV systems.
机译：新兴的Internet应用程序IPTV可能会通过大量新流量淹没Internet访问和骨干ISP。尽管IPTV视频分发可能有许多体系结构，但已经在Internet上成功部署了几种网状P2P体系结构。为了深入了解网状P2P IPTV系统及其对ISP的流量负载，我们对最流行的IPTV系统之一PPLive进行了深入的测量研究。我们已经开发了专用的PPLive爬行器，这使我们能够研究网状PPLive系统的全局特性。我们还针对各种不同的测量场景收集了广泛的数据包跟踪，包括校园访问网络和住宅访问网络。通过这些平台获得的测量结果为P2P IPTV系统带来了重要的见识。具体而言，我们的结果显示如下。 1）P2P IPTV用户具有与普通电视用户相似的观看行为。 2）在会话期间，一个对等体与大量对等体动态交换视频数据。 3）少数超级对等方充当视频代理，并为视频数据上传做出了重要贡献。 4）在测得的P2P IPTV系统中，用户仍然会遭受长时间的启动延迟和播放延迟，从几秒钟到几分钟不等。这项研究中获得的见解对于将来的P2P IPTV系统的开发和部署将是有价值的。

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