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Providing Throughput and Fairness Guarantees in Virtualized WLANs Through Control Theory

Banchs, Albert and Serrano, Pablo and Patras, Paul and Natkaniec, Marek (2012) Providing Throughput and Fairness Guarantees in Virtualized WLANs Through Control Theory. [Journal Articles]

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Abstract

With the increasing demand for mobile Internet access, WLAN virtualization is becoming a promising solution for sharing wireless infrastructure among multiple service providers. Unfortunately, few mechanisms have been devised to tackle this problem and the existing approaches fail in optimizing the limited bandwidth and providing virtual networks with fairness guarantees. In this paper, we propose a novel algorithm based on control theory to configure the virtual WLANs with the goal of ensuring fairness in the resource distribution, while maximizing the total throughput. Our algorithm works by adapting the contention window configuration of each virtual WLAN to the channel activity in order to ensure optimal operation. We conduct a control-theoretic analysis of our system to appropriately design the parameters of the controller and prove system stability, and undertake an extensive simulation study to show that our proposal optimizes performance under different types of traffic. The results show that the mechanism provides a fair resource distribution independent of the number of stations and their level of activity, and is able to react promptly to changes in the network conditions while ensuring stable operation.

Item Type: Journal Articles
Uncontrolled Keywords: wireless LAN · virtualization · 802.11 · control theory · throughput optimization · fairness
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: 29 Jan 2013 11:34
Last Modified: 31 Dec 2013 11:50
URI: http://eprints.networks.imdea.org/id/eprint/370

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