Understanding Overlay Characteristics of a Large-Scale Peer-to-Peer IPTV System

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Executive Summary

This paper presents results from the authors' measurement and modeling efforts on the large-scale Peer-to-Peer (P2P) overlay graphs spanned by the PPLive system, the most popular and largest P2P IPTV (Internet Protocol Television) system today. Unlike other previous studies on PPLive, which focused on either network-centric or user-centric measurements of the system, the authors' study is unique in focusing on PPLive overlay-specific characteristics, and being the first to derive mathematical models for its distributions of node degree, session length, and peer participation in simultaneous overlays.

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