A TCP-aware Call Admission Control scheme for packet-switched wireless networks

Traditional Call Admission Control (CAC) schemes only consider call-level performance and are believed to be sufficient for the circuit-switched wireless network. Since the future wireless network will become packet-switched, the packet-level performance should not be ignored. This is especially true when the TCP-type of applications are running over such packe-switched wireless networks, because TCP congestion control algorithm will exhaust all the available resource until packet loss occurs. In order to regulate the TCP applications to friendly coexist with other types of services, we propose a TCP-aware CAC scheme. We analyze the system performance under the scenario that call holding time is independent of the system state. Simulations results for different performance metrics are presented to show that the proposed scheme can effectively improve the system performance in terms of call blocking probability, call-level throughput (call/min) and the link utilization.