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	Multi-task downloading for P2P-VoD: An empirical perspective
	Zhang, Tieying ; Li, Zhenhua ; Cheng, Xueqi ; Sun, Xianghui
	2010
英文摘要	For current P2P-VoD systems, three fundamental problems exit in user experience: exceedingly large startup delay, long jump latency, and poor playback continuity. These problems primarily stem from lack of media data. In this paper, we propose Multi-Task Downloading with Bandwidth Control (MTD(BC)), an efficient and practical mechanism to prefetch media data. In MTD, a user can download multiple videos in parallel with its current viewing, which significantly decreases video switching delays. However, MTD brings a serious problem: downloading 'other' tasks could impede the playback performance of the current viewing, especially in low-bandwidth network. This problem is solved through our design of bandwidth control. To our knowledge, we are the first to propose MTD with bandwidth control for P2P-VoD and conduct empirical evaluations in the real-world system. The running results show that MTD(BC) achieves better streaming quality than the traditional method. In particular, our mechanism reduces 75% of startup delay and 36% of jump latency in low-bandwidth network with high system scalability. ? 2010 IEEE.; EI; 0
语种	英语
DOI标识	10.1109/ICPADS.2010.11
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/329724]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhang, Tieying,Li, Zhenhua,Cheng, Xueqi,et al. Multi-task downloading for P2P-VoD: An empirical perspective. 2010-01-01.

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