On Distributed Dynamic Channel Allocation in Mobile Cellular Networks
IEEE Transactions on Parallel and Distributed Systems
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Channel allocation schemes in a mobile computing (wireless)environment can be either static or dynamic. Static allocationoffers negligible channel acquisition time and zeromessage complexity and works well at a low system load;the performance steadily decreases as system load increasessince many calls are dropped; in case of even temporary hotspots many calls may be dropped by a heavily loaded switchingstation even when there are enough idle channels in theinterference region of that station. On the other hand, dynamicschemes provide better utilization of the channels athigher loads albeit at the cost of higher channel acquisitiontime and some additional control messages. Our purpose inthe present paper is to propose a combined channel allocationscheme that each switching station can tune to its ownload independent of other stations in its interference region;the objective is to minimize the call drop rate and at the sametime maintain a minimum average channel acquisition timeand minimum control message complexity.