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TKN Technical Report Series

A Framework for Interference Mitigation in Multi-Cell 802.11 Wireless LANs
Citation key abusubaih08a_framework_for
Author Abusubaih, Murad and Wolisz, Adam and Rathke, Berthold and Hollós, Dániel
Year 2008
Number TKN-08-011
Month November
Institution Telecommunication Networks Group, Technische Universität Berlin
Abstract Despite being robust and efficient within the same Basic Service Set (BSS) of a Wireless LAN (WLAN), the CSMA/CA fails to satisfy the QoS requirements for many users in a dense WLAN due to the interference problem. This paper proposes a framework for interference mitigation in multi-BSS infrastructure 802.11 WLANs. Our interference mitigation approach is based on Access Point (AP) Coordination. With this approach, interfering APs negotiate and switch from the 802.11 CSMA/CA to a time slotted mechanism whenever users' QoS is observed to be degraded and diagnoses conclude that the cause is high interference. Unlike previous work published in this area, the proposed approach is in alignment with the ongoing discussions within the standarization bodies in the sense that system operation is driven by measurements of interference conditions rather than fixed models which may not apply to all scenarios. We utilize the wireless bandwidth and improve the fairness among WLAN users. We present results of detailed simulation experiments as well as real implementation.
Bibtex Type of Publication TKN Technical Report Series
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