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Impact of interference on throughput in dense WLANs with multiple APs

Drieberg, M., Zheng, F., Ahmad, R. and Fitch, M. (2009) Impact of interference on throughput in dense WLANs with multiple APs. In: 20th International Symposium on Personal, Indoor and Mobile Radio Communications, Tokyo, Japan, pp. 752-756,

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To link to this item DOI: 10.1109/PIMRC.2009.5450199


The popularity of wireless local area networks (WLANs) has resulted in their dense deployments around the world. While this increases capacity and coverage, the problem of increased interference can severely degrade the performance of WLANs. However, the impact of interference on throughput in dense WLANs with multiple access points (APs) has had very limited prior research. This is believed to be due to 1) the inaccurate assumption that throughput is always a monotonically decreasing function of interference and 2) the prohibitively high complexity of an accurate analytical model. In this work, firstly we provide a useful classification of commonly found interference scenarios. Secondly, we investigate the impact of interference on throughput for each class based on an approach that determines the possibility of parallel transmissions. Extensive packet-level simulations using OPNET have been performed to support the observations made. Interestingly, results have shown that in some topologies, increased interference can lead to higher throughput and vice versa.

Item Type:Conference or Workshop Item (Paper)
ID Code:14996
Uncontrolled Keywords:radiofrequency interference, wireless LAN , OPNET, dense WLAN, extensive packet-level simulations, interference, multiple access points, throughput, wireless local area networks

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