Finite Population Based Call Admission Control in Integrated Cellular Ad-hoc Relaying System

This paper presents an analytical model for analyzing the handoff performance of the finite population Integrated Cellular Ad hoc Relaying (iCAR) system. The analytical model is used to investigate the new call blocking and handoff dropping probabilities with and without call admission control (CAC) schemes. The finite population fractional guard channel (FPFGC) scheme is deployed as the CAC scheme in the iCAR system, which allows the reservation of a real number of channels rather than an integer number of channels. We compare the performance of the finite population iCAR system with conventional cellular systems in terms of the call blocking/dropping probability. Our results show that handoff performance benefits of the iCAR system over conventional cellular systems. The proposed policy is shown to be much lower call dropping probability than cellular networks, when the population size is large. Also, the call blocking/dropping probability in a congested cell and the overall system can be reduced with a limited number of ad hoc relaying stations.