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In this paper we analyze the packet interference probability and the aggregated throughput of a WPAN in which a number of Bluetooth piconets share the ISM band with WLANs. When an Adaptive Frequency Hopping (AFH) algorithm is used, the number of hops available to the Bluetooth piconets varies depending on the number of independent WLANs within the piconets radio range. Using a packet collision model in a piconet cluster, we give an analysis of the packet interference probability and the aggregated throughput as a function of the available hops for the AFH algorithm. We also present an analytical model of packet interference with multi-path fading channel in a cluster of piconets. Through analysis, we obtain the packet collision probability and aggregated throughput assuming capture effect. Numerical examples are given to demonstrate the effect of various parameters such as capture ratio, Rice factor and cluster size on the system performance.
Date of Conference: 23-25 Jan. 2008