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Department, of Mathematics & Computer Sciences, Kuwait University, P.O.Bo.:5969, Safat, Kuwait 13060. e-mail: math@mcc.sci.kuniv.edu.kw

ABSTRACT

In parts of cellular networks where a large number of users exist, new calls and handoff requests compete for the base-station available resources. In this paper, we present a new handoff and call admission strategy for cellular networks in downtown areas. The new strategy is a predictive dynamic reservation mechanism based on a probabilistic mobile positioning. The scheme uses probabilistic threshold values that are dynamically adjusted to cope with the predicted handoff from neighboring cells without causing an unnecessary new calls high rejection rate. We compare via simulation the performance of the new strategy to some known handoff schemes. We use a Manhattan-like street topology and compare our method with the following two methods: the traditional guard channel mechanism and a simple adaptive reservation mechanism. The tradeoffs in the design of the proposed method are explored and some approaches for further improvements are discussed.

Keywords: Cellular networks; channel management; handoff. Mobile, wireless.