New algorithm for fractional channel reservation in limited fractional gurad channel policy

Abstract

In the current and even the coming generation of wireless networks, cellular system is still considered as the major method of telecommunication infrastructure. One of the major challenges in multi-services wireless cellular networks is the design of effective call admission control algorithm. The probability of dropping and blocking of calls is the significant performance metrics for quality of service in wireless network. In this study, a new fractional guard channel policy is proposed in a cell based on the current estimation of dropping probability of handoff calls. This policy introduces variable threshold for fractional guard channels. The new algorithm is proposed to find optimal fractional channel reservation which reduces data blocking probability. It shows improvements in comparison with guard channel policy by reducing the new call blocking probability, increasing the carried traffic. At the end, the two- dimensional traffic model is simulated and the related results are reviewed.