An Improved call admission control (CAC) scheme in IEEE 802.16e Networks

Abstract

In this paper, an enhanced CAC scheme is proposed to overcome the problem of resource wastage in 802.16e networks. It introduces an adaptive threshold that dynamically adjusts the quantity of reserved bandwidth for handoff-connections based on the traffic intensity of a handoff requests. An extensive simulation experiments have been conducted to evaluate the performance of the proposed scheme. The simulation results  illustrate that the proposed scheme significantly  improve the network efficiency as compared to the  other scheme in terms of reducing the new connection blocking probability and handoff connection dropping probability.