New mobility based call admission control with on-demand borrowing scheme for QOS provisioning

In this paper, an advanced call admission control strategy is proposed in which bandwidth is allocated more efficiently and effectively to neighbouring cells by exploiting key mobility parameters to provide consistent Quality of Service (QoS) guarantees for multimedia traffic. Concomitantly, to ensure continuity of on-going calls with better utilization of resources, bandwidth is borrowed from existing adaptive calls without affecting the minimum QoS guarantee. The performance of the scheme is compared with other techniques including the rate-based borrowing scheme and implicit QoS provisioning strategy. Simulation results prove that this new scheme offers significant improvements in the requisite performance metrics of call blocking probability, call dropping probability, and bandwidth utilization, under a variety of differing traffic conditions.