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Optimized video streaming over 802.11 by cross-layer signaling

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5 Author(s)
Haratcherev, L. ; Delft Univ. of Technol., Netherlands ; Taal, J. ; Langendoen, K. ; Lagendijk, R.
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Seamless video streaming over wireless links imposes strong demands on video codecs and the underlying network. It is not sufficient that only the video codec or only the radio adapts to changes in the wireless link quality; efforts should be applied in both layers, and - if possible - synchronized. Also, the disturbing effect of possible background traffic over the same shared medium has to be taken into account. In this article we present a communication architecture for video streaming over 802.11 that is capable of adapting to changes in the link quality and sharing of the wireless channel in various use scenarios. Experimental results show that substantial improvements in the quality of the video can be obtained by applying link adaptation and cross-layer signaling techniques.

Published in:

Communications Magazine, IEEE  (Volume:44 ,  Issue: 1 )

Date of Publication:

Jan. 2006

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