Loughborough University
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A control theoretic approach to achieve proportional fairness in 802.11e EDCA WLANs

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journal contribution
posted on 2015-09-14, 09:51 authored by Shuang-Hua Yang, Xiaomin Chen, Ib Akinyemi
This paper considers proportional fairness amongst ACs in an EDCA WLAN redfor provision of distinct QoS requirements and priority parameters. A detailed theoretical analysis is provided to derive the optimal station attempt probability which leads to a proportional fair allocation of station throughputs. The desirable fairness can be achieved using a centralised adaptive control approach. This approach is based on multivariable statespace control theory and uses the Linear Quadratic Integral (LQI) controller to periodically update CWmin till the optimal fair point of operation. Performance evaluation demonstrates that the control approach has high accuracy performance and fast convergence speed for general network scenarios. To our knowledge this might be the first time that a closed-loop control system is designed for EDCA WLANs to achieve proportional fairness.


This work was conducted as part of the project ISSEWATUS (issewatus.eu) and has been financially funded by European Commission through the FP7 program (Grant agreement no:619228).



  • Science


  • Computer Science

Published in

Computer Communications


YANG, S-H., CHEN, X. and AKINYEMI, I., 2016. A control theoretic approach to achieve proportional fairness in 802.11e EDCA WLANs. Computer Communications. 75, pp.39-49.


© Elsevier


  • SMUR (Submitted Manuscript Under Review)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date



This paper is a pre print published in the journal Computer Communications: http://www.sciencedirect.com/science/journal/01403664




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