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A Channel-Aware and Occupancy-Dependent Scheduler for Video Transmission over Wireless Channels

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Author(s): Mohamed Hassan | Taha Landolsi | Husameldin Mukhtar

Journal: International Journal of Computer Networks & Communications
ISSN 0975-2293

Volume: 2;
Issue: 5;
Start page: 232;
Date: 2010;
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Keywords: Multimedia scheduling | multimedia communications | wireless channels.

ABSTRACT
In this paper, we propose an adaptive and fair priority scheduler for video streaming over wireless links. The proposed schemeselects the client to be served based on the instantaneous occupancy of the decoder buffers of the wireless clients as well asthe quality of the channel as seen by these clients in addition to the sensitivity of scheduled video frames. Unlike conventionalscheduling algorithms, the proposed scheme accounts for the characteristics and strict requirements of multimedia applicationswith considerably low computational complexity. When compared to other commonly-used scheduling algorithms, the proposedalgorithm achieves better performance in terms of the individual and average buffer occupancies of the decoder buffers of thewireless clients as well as the end-to-end delay experienced by the video frames. Simulations are carried out to study the interactionsamong the key parameters of the proposed scheduling algorithm.
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