DocumentCode :
2932344
Title :
Optimizing segment caching for peer-to-peer on-demand streaming
Author :
Tang, Ho-Shing ; Chan, S. -H Gary ; Li, Haochao
fYear :
2009
fDate :
June 28 2009-July 3 2009
Firstpage :
810
Lastpage :
813
Abstract :
In peer-to-peer (P2P) on-demand streaming applications, multimedia content is divided into segments and peers can seek any segments for viewing at anytime. Since different segments may be of different popularity, random segment caching would lead to a segment popularity-supply mismatch, and hence an uneven workload distribution among peers. Some popular segments may be far from peers, leading to inefficient search and streaming. In this paper, we study optimal segment caching for P2P on-demand streaming. We first state the segment caching optimization problem, and propose a centralized heuristic to solve it, which serves as a benchmark for other algorithms. We then propose a distributed caching algorithm termed POPCA (popularity-based caching algorithm), in which each peer adaptively and independently replaces segments to minimize the popularity-supply discrepancy and the segment distance from peers. Through simulations, we show that POPCA achieves near-optimal performance, and lower peer workload and segment distance as compared with other schemes.
Keywords :
cache storage; media streaming; multimedia computing; peer-to-peer computing; multimedia content; peer-to-peer on-demand streaming; popularity-based caching algorithm; segment caching optimisation; segment popularity-supply mismatch; workload distribution; Application software; Cache storage; Computer science; Councils; Motion pictures; Network coding; Network servers; Peer to peer computing; Streaming media; Technological innovation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia and Expo, 2009. ICME 2009. IEEE International Conference on
Conference_Location :
New York, NY
ISSN :
1945-7871
Print_ISBN :
978-1-4244-4290-4
Electronic_ISBN :
1945-7871
Type :
conf
DOI :
10.1109/ICME.2009.5202618
Filename :
5202618
Link To Document :
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