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Performance of Asynchronous Channel Assignment Scheme in Non-Uniform and Dynamic Topology WLANs

Drieberg , Micheal and Zheng, Fu-Chun and Ahmad, Rizwan and Fitch, Michael (2009) Performance of Asynchronous Channel Assignment Scheme in Non-Uniform and Dynamic Topology WLANs. In: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 13-16 September 2009, Tokyo, Japan.

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Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb...

Abstract

Dense deployments of wireless local area networks (WLANs) are fast becoming a permanent feature of all developed cities around the world. While this increases capacity and coverage, the problem of increased interference, which is exacerbated by the limited number of channels available, can severely degrade the performance of WLANs if an effective channel assignment scheme is not employed. In an earlier work, an asynchronous, distributed and dynamic channel assignment scheme has been proposed that (1) is simple to implement, (2) does not require any knowledge of the throughput function, and (3) allows asynchronous channel switching by each access point (AP). In this paper, we present extensive performance evaluation of this scheme when it is deployed in the more practical non-uniform and dynamic topology scenarios. Specifically, we investigate its effectiveness (1) when APs are deployed in a nonuniform fashion resulting in some APs suffering from higher levels of interference than others and (2) when APs are effectively switched `on/off' due to the availability/lack of traffic at different times, which creates a dynamically changing network topology. Simulation results based on actual WLAN topologies show that robust performance gains over other channel assignment schemes can still be achieved even in these realistic scenarios.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE:Departments > Electrical & Electronic Engineering
ID Code:3660
Deposited By: Micheal Drieberg
Deposited On:23 Dec 2010 08:53
Last Modified:23 Dec 2010 08:53

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