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Received: 2005-12-02

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.5 P.773-783


Distributed media cooperation for enhanced video communication

Author(s):  Chakareski Jacob

Affiliation(s):  Ecole Polytechnique Fé more

Corresponding email(s):   jakov.cakareski@epfl.ch

Key Words:  Media cooperation, Distributed video streaming, Wireless networks, Resource allocation, Rate-quality optimization

Chakareski Jacob. Distributed media cooperation for enhanced video communication[J]. Journal of Zhejiang University Science A, 2006, 7(5): 773-783.

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The author designed two algorithms for distributed cooperation among multiple video streams sharing common communication resources. The algorithms take advantage of an optimization framework that characterizes video packets such that joint resource allocation can be implemented not only over the packets of a single stream, but also across packets of different streams. The first algorithm enables collaboration among multiple video senders in an 802.11 CSMA/CA wireless network such that their joint performance is maximized. Via the algorithm, the users cooperatively establish transmission priorities based on the assigned characterizations of their video packets. The second technique allows for low-complexity joint bandwidth adaptation of multiple video streams at intermediate network nodes in the Internet in order to maximize the overall network performance. The author analyzes the advantages of the proposed algorithms over conventional solutions employed in such scenarios. It is shown that depending on system parameters such as available network data rate the proposed techniques can provide substantial gains in end-to-end performance.

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