Redesigning multi-channel P2P live video systems with View-Upload Decoupling

In current multi-channel P2P live video systems, there are several fundamental performance problems including exceedingly-large channel switching delays, long playback lags, and poor performance for less popular channels. These performance problems primarily stem from two intrinsic characteristics o...

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Bibliographic Details
Published in:Computer networks (Amsterdam, Netherlands : 1999) Netherlands : 1999), 2010-08, Vol.54 (12), p.2007-2018
Main Authors: Wu, Di, Liang, Chao, Liu, Yong, Ross, Keith W.
Format: Article
Language:English
Subjects:
Algorithms
Allocations
Bandwidth
Bandwidths
C (programming language)
Channels
Communication channels
Computer simulation
Decoupling
Delay
P2P applications
Peer to peer computing
Performance evaluation
Simulation
Streaming media
Studies
Switching
Video streaming
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Summary:In current multi-channel P2P live video systems, there are several fundamental performance problems including exceedingly-large channel switching delays, long playback lags, and poor performance for less popular channels. These performance problems primarily stem from two intrinsic characteristics of multi-channel P2P video systems: channel churn and channel-resource imbalance. In this paper, we propose a radically different cross-channel P2P streaming framework, called View-Upload Decoupling (VUD). VUD strictly decouples peer downloading from uploading, bringing stability to multi-channel systems and enabling cross-channel resource sharing. We propose a set of peer assignment and bandwidth allocation algorithms to properly provision bandwidth among channels, and introduce substream-swarming to reduce the bandwidth overhead. We evaluate the performance of VUD via extensive simulations as well with a PlanetLab implementation. Our simulation and PlanetLab results show that VUD is resilient to channel churn, and achieves lower switching delay and better streaming quality. In particular, the streaming quality of small channels is greatly improved.
ISSN:1389-1286
1872-7069
DOI:10.1016/j.comnet.2010.03.024