Development of Handoff Failure Management by an Improved Channel Allocation Technique

Now a day, IEEE 802.11 based wireless local area networks (WLAN) have been widely deployed for business and personal applications. The main issue regarding wireless network technology is handoff or hand over management. The Quality of Service (QoS) is improved when the handoff is performed successfully and as frequently as possible without being perceptible to the users. Thus, it is required to prioritize the handoff request so as to minimize the blocking probability of handoff calls. The minimization of handoff failure due to call blocking is an important issue of research. For the last few years plenty of researches had been done to reduce the handoff failure. In this paper, we propose a hybrid channel allocation scheme which would effectively reduce the handoff call blocking probability. A handoff call queuing priority scheme has also been proposed to reduce forced call termination and hence enhance the performance of the system. Simulation results yield that the proposed mechanism outperforms the fixed channel assignment technique.