Novel system modeling in call admission control for wireless personal communications

This paper proposes a call admission control (CAC) policy for a wireless communication system supporting both voice and data calls. The total available resources are shared without partitioning between the two types of the calls. Under the CAC, the traffic model for voice calls is an M/M/m/m queue and that for data calls is an M/G/m/m queue. For data calls, the service time distribution is related to the message length distribution and the number of voice and data users respectively in the system. The modeling is more accurate and practical than previously proposed approaches. Numerical results demonstrate that the proposed CAC policy is able to maintain all the specified QoS requirements to the mobile users.