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WMSCI 05 COMMUNICATION AND NETWORK SYSTEMS TECHNOLOGIES AND APPLICATIONS 1 Optimal Access Point Selection and Traffic Allocation in IEEE 802 11 Networks Robert Akl and Sangtae Park Department of Computer Science and Engineering University of North Texas Denton Texas 76207 ABSTRACT We design an optimal access point AP selection and traffic allocation algorithm for IEEE 802 11 networks Coverage and capacity are some key issues when selecting APs in a demand area APs need to cover all users i e a user is considered covered if the power received from its corresponding AP is greater than a given threshold Moreover from a capacity standpoint APs need to provide certain minimum bandwidth to users located in the coverage area Our optimization balances the load on the entire network whereby demand clusters will not necessarily select the closest AP that has the largest signal level but one that can still service the demand cluster and provide ample bandwidth Keywords WiFi Access Point Wireless Networks Optimization 1 INTRODUCTION IEEE 802 11 wireless networks offer performance nearly comparable to that of Ethernet 1 In addition they provide scalability and relative ease of integrating wireless access Wireless LANs support user demand for seamless connectivity flexibility and mobility 2 The most prominent differences between wireless LANs and wired LANs are transmission medium and speed Designing IEEE 802 11 wireless networks 3 includes two major components placement of access points APs in the demand areas and assignment of radio frequencies to each AP Coverage and capacity are some key issues when placing APs in a demand area APs need to cover all users A user is considered covered if the power received from its corresponding AP is greater than a given threshold Moreover from a capacity standpoint APs need to provide certain minimum bandwidth to users located in the coverage area In 4 the authors use a divide and conquer algorithm to select APs The algorithm divides the



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