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A Control Theoretic Scheme for Efficient Video Transmission over IEEE 802.11e EDCA WLANs

Patras, Paul and Banchs, Albert and Serrano, Pablo (2012) A Control Theoretic Scheme for Efficient Video Transmission over IEEE 802.11e EDCA WLANs. [Journal Articles]

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Official URL: http://tomccap.acm.org/

Abstract

The EDCA mechanism of the IEEE 802.11 standard has been designed to support, among others, video traffic. This mechanism relies on a number of parameters whose configuration is left open by the standard. Although there are some recommended values for these parameters, they are fixed independent of the WLAN conditions, which results in suboptimal performance. Following this observation, a number of approaches in the literature have been devised to set the EDCA parameters based on an estimation of the WLAN conditions. However, these previous approaches are based on heuristics and hence do not guarantee optimized performance. In this paper we propose a novel algorithm to adjust the EDCA parameters to carry video traffic which, in contrast to previous approaches, is sustained on mathematical foundations that guarantee optimal performance. In particular, our approach builds upon i) an analytical model of the WLAN performance under video traffic, used to derive the optimal point of operation of EDCA, and ii) a control theoretic designed mechanism which drives the WLAN to this point of operation. Via extensive simulations, we show that the proposed approach performs optimally and substantially outperforms the standard recommended configuration as well as previous adaptive proposals.

Item Type: Journal Articles
Uncontrolled Keywords: Computer-Communication Networks: Network Architecture and Design, Wireless communication, Algorithms, Design, Performance,control theory, EDCA, IEEE 802.11, video transmission
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Rebeca De Miguel
Date Deposited: 14 Feb 2012 13:29
Last Modified: 06 Aug 2013 12:26
URI: http://eprints.networks.imdea.org/id/eprint/49

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