Reuse partitioning is a technique for providing more efficientspectrum reuse in cellular radio systems. A cell in such a system isdivided into concentric zones, each associated with an overlaid cellplan. Calls that arise in the periphery of the cell have fewer channelsin their availability than those arising close to the base station andtherefore they experience higher blocking rates. The authors considerthe problem of balancing uniformly the blocking probability throughoutthe cell offering a fair treatment to the whole area within the cell, bycontrolling the allocation do the different channel layers. A policythat minimizes the maximum blocking probability experienced at anylocation of the cell is identified and is shows to be of threshold type,An adaptive scheme that adjusts the threshold based on estimates of theblocking probabilities in the different zones of the cell as proposed.This scheme tracks the optimal threshold effectively without anyknowledge of the traffic parameters. Simulation study shows thatsubstantial capacity improvements care achieved by the application ofthe optimal channel assignment policy, over the uncontrolledsystem
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