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Journal of Computer Science and Its Application

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Adaptive guard channel allocation scheme with buffer for mobile network

O.A. Ojesanmi, O Oyedele, O.R. Vincent, M Olayiwola

Abstract


The devastating effect congestion has on the quality of service delivery and overall network performance demands an utmost attention. This certainly calls for taking some expedient measures to deal with congestion so as to salvage the network from total collapse. In this paper, an adaptive guard channel allocation scheme with buffer to handle resource assignment in mobile network is presented. The scheme uses a dynamic reservation system that adapts to network characteristics for efficient allocation. The available channels are divided into two: open channel and reserved channel. The open channels are used by both new and handoff calls when channels are available while only handoff calls are allowed to use the guard channel when there are no idle channels at the open. The input traffic rate determines the threshold of the guard channel. A simulation program written in Java programming language evaluates the performance of the scheme based on blocking/dropping probabilities of both calls. Results of the evaluation is described using descriptive statistics such as bar charts. The proposed scheme would reduce congestion and improve quality of service delivery in mobile network.

Keywords: Guard Channel, Quality of Service, Handoff Call, New Call, Buffer, Blocking Probability




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