The effect of an enhanced channel assignment algorithm on an IEEE 802.11 WLAN

Authors:
Mohamad Haidar;Hussain Al-Rizzo;Robert Akl;Zouhair El-Bazzal
Affiliations:
Electrical Engineering Department, Ecole de Technologie Superieure, Montreal, Quebec, Canada;Department of Systems Engineering, Little Rock, AR;Department of Computer Science and Engineering, Denton, Texas;Ecole de Technologie Superieure, Montreal, Quebec, Canada
Venue:
WSEAS TRANSACTIONS on COMMUNICATIONS
Year:
2009

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Abstract

In this paper, a channel-assignment algorithm at the Access Points (APs) of a Wireless Local Area Network (WLAN) is proposed in order to maximize Signal-to-Interference Ratio (SIR) at the user level. We start with an initial channel assignment based on minimizing the total interference between APs. Based on this assignment, we calculate the SIR for each user. Then, another channel assignment is performed based on maximizing the SIR at the users. The algorithm can be applied to any WLAN, irrespective of the users' and load distributions. Simulation results showed that the proposed algorithm is capable of significantly increasing the SIR over the WLAN, which in turn improves throughput. Finally, several scenarios were constructed using OPNET simulation tool to validate our results.