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Control Theoretic Optimization of 802.11 WLANs: Implementation and Experimental Evaluation

Serrano, Pablo and Patras, Paul and Mannocci, Andrea and Mancuso, Vincenzo and Banchs, Albert (2013) Control Theoretic Optimization of 802.11 WLANs: Implementation and Experimental Evaluation. [Journal Articles]

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Abstract

In 802.11 WLANs, adapting the contention parameters to network conditions results in substantial performance improvements. Even though the ability to change these parameters has been available in standard devices for years, so far no adaptive mechanism using this functionality has been validated in a realistic deployment. In this paper we report our experiences with implementing and evaluating two adaptive algorithms based on control theory, one centralized and one distributed, in a large-scale testbed consisting of 18 commercial off-the-shelf devices. We conduct extensive measurements, considering different network conditions in terms of number of active nodes, link qualities and traffic generated. We show that both algorithms significantly outperform the standard configuration in terms of total throughput. We also identify the limitations inherent in distributed schemes, and demonstrate that the centralized approach substantially improves performance under a large variety of scenarios, which confirms its suitability for real deployments.

Item Type: Journal Articles
Uncontrolled Keywords: WLAN; 802.11; Control theory; Experimentation
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: Vincenzo Mancuso
Date Deposited: 21 Sep 2012 09:30
Last Modified: 29 Jun 2016 10:02
URI: http://eprints.networks.imdea.org/id/eprint/341

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