Service-Class-Based Joint Call Admission Control and Adaptive Bandwidth Management Scheme for Heterogeneous Wireless Networks

Joint call admission control (JCAC) can significantly improve connection-level quality of service (QoS) in heterogeneous wireless networks. This paper proposes serviceclass-based JCAC and adaptive bandwidth management scheme to enhance connection-level QoS in heterogeneous cellular networks, where each cellular network is optimized to support specific classes of service. We develop an analytical model for the JCAC scheme using a multi-dimensional Markov chain. Two connection-level QoS metrics, new call blocking probability and handoff call dropping probability, are derived and evaluated for the heterogeneous cellular network. Numerical results show that the proposed JCAC scheme reduces handoff call dropping probability and new call blocking probability in heterogeneous cellular networks.