A Measurement of a large-scale Peer-to-Peer Live Video Streaming System
ICPPW '07 Proceedings of the 2007 International Conference on Parallel Processing Workshops
On scalability of proximity-aware peer-to-peer streaming
Computer Communications
A Measurement Study of a Large-Scale P2P IPTV System
IEEE Transactions on Multimedia
An Empirical Study of the Coolstreaming+ System
IEEE Journal on Selected Areas in Communications
Inferring Network-Wide Quality in P2P Live Streaming Systems
IEEE Journal on Selected Areas in Communications
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Peer-to-peer (P2P) technology for TV broadcasting over the Internet is becoming more and more popular in the very last years. This paper introduces a network-wide metric to assess the efficiency of P2P streaming systems and develops a mathematical model to explain: (i) the scalability of such architectures with the number of peers, as evidenced by recent measurements; (ii) the initial decrement of efficiency (hence, quality) when a sharp increase in the number of peers in system occurs, as reported by experimental data. As for the second point, the proposed model builds upon the fundamental remark that when a peer first joins the system, it has no video content to share with others: its upload contribution is null for an initial time interval and the new peer behaves as a free rider. Three situations concerning the system reaction to the requests of the new entering peers are examined: full compensation; partial compensation; no reaction at all. Depending on the system answer and on its extent, system efficiency is shown to exhibit different time trends.