A cooperative scheme for dynamic window resizing in P2P live streaming

Authors:
Zhipeng Ouyang;Lisong Xu;Byrav Ramamurthy
Affiliations:
Department of Computer Science and Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska;Department of Computer Science and Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska;Department of Computer Science and Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

Due to their widespread popularity, Peer-to-Peer (P2P) live streaming systems have become a great challenge for Internet Service Providers (ISPs) as they consume huge amount of Internet bandwidth. By observing that different users may watch a channel with different window sizes, we propose a cooperative scheme called Partial Participation Scheme (PPS) in which different peers request a video stream at different rates based on their window sizes, and a subset of peers viewing the video stream using a small window work as helpers to forward extra data to help other peers using a large window. By reducing streaming rate received by small-window peers, the total amount of consumed bandwidth decreases without sacrificing users' satisfaction. PPS includes peer cooperative bandwidth allocation algorithms and neighbor maintenance mechanisms to achieve short resizing delay when a peer changes its window between different sizes. We evaluate the performance of PPS via a comprehensive set of metrics generated from extensive simulations. Our simulation results show that PPS greatly reduces the bandwidth consumption, achieves short resizing delay, and maintains high and stable streaming quality.