A Statistical Connection Admission Control Mechanism for Multiservice IEEE 802.16 Network

IEEE 802.16 is a promising technology in broadband wireless access area. In multiservice IEEE 802.16 network, connection admission control (CAC) plays a critical role for resource management and QoS guarantee. In this paper, a statistical CAC mechanism is proposed for IEEE 802.16 network. In order to avoid the QoS degradation, the proposed CAC mechanism considers the traffic variability and overflow. Furthermore, a model of traffic and air interface capacity is provided to make the CAC mechanism easy to be implemented. Then, a performance analysis model based on Markov chains is proposed. Numerical and simulation results show that the proposed CAC mechanism can prevent the traffic overflow and achieve a good packet level QoS.