A measurement study of a large-scale P2P IPTV system
A measurement study of a large-scale P2P IPTV system
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DOI：
10.1109/tmm.2007.907451
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发表时间：
2007-12-01
影响因子：
7.3
通讯作者：
Ross, Keith W.
中科院分区：
文献类型：
--
作者：
Hei, Xiaojun;Liang, Chao;Ross, Keith W.
新兴的Internet应用程序IPTV有可能淹没Internet访问和骨干ISP，并具有大量新流量。尽管IPTV视频发行版可能进行了许多架构，但已成功部署了几个网状Pull P2P架构。为了洞悉网格Pull P2P IPTV系统及其在ISP上的交通负载，我们对最受欢迎的IPTV系统之一进行了深入的测量研究，即Pplive。我们已经开发了一个专用的pplive梁，这使我们能够研究网格 - 淘汰系统的全球特征。我们还为各种不同的测量场景（包括校园访问网络和住宅访问网络）收集了广泛的数据包轨迹。通过这些平台获得的测量结果将重要的见解带入了P2P IPTV系统。具体来说，我们的结果显示了以下内容。 1）P2P IPTV用户具有与常规电视用户相似的观看行为。 2）在会议期间，同行与大量同行动态交换视频数据。 3）一小部分超级同行充当视频代理，并为视频数据上传做出了重大贡献。 4）测得的P2P IPTV系统中的用户仍然遭受较长的启动延迟和播放滞后的困扰，范围从几秒钟到几分钟。在这项研究中获得的见解对于开发和部署未来P2P IPTV系统将是有价值的。
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.