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Experimental comparison of neighborhood filtering strategies in unstructured P2P-TV systems
|Title||Experimental comparison of neighborhood filtering strategies in unstructured P2P-TV systems|
|Publication Type||Conference Paper|
|Year of Publication||2012|
|Authors||Traverso, S., L. Abeni, R. Birke, C. Kiraly, E. Leonardi, R. Lo Cigno, and M. Mellia|
|Conference Name||2012 IEEE 12th International Conference on Peer-to-Peer Computing (P2P)|
|Conference Location||Trragona, Spain|
|Keywords||expermental comparison, overlay, P2P-TV, QoE|
P2P-TV systems performance are severely impacted by the overlay topology peers form. Yet, detailed experimental studies on its features are missing. This work provides a comprehensive experimental comparison of different strategies for the construction and maintenance of the overlay topology for P2P-TV systems. We have implemented different fully-distributed strategies for the design of the overlay topology within YYYYStreamer, the P2P-TV application developed with WWWWproject project. An extensive campaign of experiments has been conducted in a fully controlled set-up which involves 1000 peers, spanning very different networking scenarios. Results show that the topological properties of the overlay have a deep impact on both user quality of experience and network impact. Strategies based solely on random peer selection are greatly outperformed by smart, yet simple strategies that can be implemented at low cost and with negligible overhead. Even in face of different and complex scenarios, the neighborhood filtering strategy we devised as most performing guarantees to deliver almost all chunks to all peers with a playout delay as low as only 6s even with system loads as high as 0.9. YYYY-Streamer is a fully fledged P2P-TV application, opensourced to make results reproducible and allow further research by the community.