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In recent years a number of research efforts have focused on effective use of P2P-based systems in providing large scale video streaming services. In particular, live streaming and Video-on-Demand (VoD) systems have attracted much interest. While previous efforts mainly focused on the common challenges faced by both types of applications, there are still a number of fundamental open questions in designing P2P-based VoD systems, which is the focus of the effort. The authors first illustrate deficiencies of current approaches in adequately meeting streaming Quality of Service (QoS) requirements. Motivated by this, they propose several practical schemes aimed at addressing these questions. To illustrate the benefits of the approach, they present an extensive simulation-based performance study of the techniques.
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