Interference mitigation in co-working IEEE 802.11n WLANs

Authors:
Christos Papathanasiou;Iordanis Koutsopoulos;Leandros Tassiulas
Affiliations:
Department of Computer and Communications Engineering, University of Thessaly, Greece;Department of Computer and Communications Engineering, University of Thessaly, Greece;Department of Computer and Communications Engineering, University of Thessaly, Greece
Venue:
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
Year:
2009

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Abstract

In a densely deployed Wireless Local Area Network (WLAN) environment, Access Points (APs) could be so close to cause significant channel interference. In the next generation IEEE 802.11n WLANs, inter-cell interference decreases spectral efficiency. By applying common transmission weight vectors in all sub-carriers at a set of users, the paper proposes a new distributed algorithm that permits interfering APs to select appropriately their operating frequency and suppress interference in co-working IEEE 802.11n WLANs. Our method increase system performance and significantly reduces implementation complexity and power consumption. Simulation results in a strong interference environment show substantial gain for our proposed strategies.