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Wireless networking is becoming an increasingly important and popular way ofproviding global information access to users on the move. One of the mainchallenges for seamless mobility is the availability of simple and robusthandoff algorithms, which allow a mobile node to roam among heterogeneouswireless networks. In this paper, the authors devise a scheme, A Novel AdaptiveChannel Allocation Scheme (ACAS) where the number of guard channel(s) isadjusted automatically based on the average handoff blocking rate measured inthe past certain period of time. The handoff blocking rate is controlled underthe designated threshold and the new call blocking rate is minimized. Theperformance evaluation of the ACAS is done through simulation of nodes. Theresult shows that the ACAS scheme outperforms the Static Channel AllocationScheme by controlling a hard constraint on the handoff rejection probability.The proposed scheme achieves the optimal performance by maximizing the resourceutilization and adapts itself to changing traffic conditions automatically.

A Novel Adaptive Channel Allocation Scheme to Handle Handoffs