Hot-spot congestion relief and service guarantees in public-area wireless networks
ACM SIGCOMM Computer Communication Review
Fairness and load balancing in wireless LANs using association control
Proceedings of the 10th annual international conference on Mobile computing and networking
Facilitating access point selection in IEEE 802.11 wireless networks
IMC '05 Proceedings of the 5th ACM SIGCOMM conference on Internet Measurement
The impact of association on the capacity of WLANs
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
Designing a practical access point association protocol
INFOCOM'10 Proceedings of the 29th conference on Information communications
A Combined Frequency Assignment and AP Scheduling for Throughput Maximization in IEEE 802.11 WLAN
Proceedings of International Conference on Advances in Mobile Computing & Multimedia
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Frequency channels are allocated to the access-points (APs) subject to an acceptable co-channel interference level in an IEEE 802.11 WLAN. Due to limited number of the non-overlapping frequency channels, all APs in a given area may not be activated simultaneously. Therefore which subset of the APs to select for activation is a major concern. Given a set of selected APs, often a station (STA) can potentially associate with more than one AP. The association of an STA to an inappropriate AP will not only lead to degraded service for the concern STA but also may pull down the throughput of the other STAs associated with that AP. Thus finding the optimal association between STAs and APs is another important concern. We argue that treating these two issues in succession may lead to suboptimal solutions, whereas, ignoring the co-channel interference may result over estimation of the throughput. In this paper, an integrated model based on integer programming and an efficient greedy algorithm are proposed that address both aspects simultaneously and maximizes the overall throughput while taking care of load balancing across different APs. Computational results show that indeed the integrated approach is superior to both two-step approach and methods that ignore the interference.