A Cell-based Call Admission Control and Bandwidth Reservation Scheme for QoS Support in Wireless Cellular Networks

Abstract The deployment of multimedia services in wireless cellular networks calls for network resource management strategies for providing Quality-of-Service (QoS) support to mobile users. An important issue in wireless QoS provisioning is the prevention of handoff drops. We develop a cell-based call admission control (CAC) and bandwidth reservation scheme that aims at minimizing the handoff dropping probability. Our scheme reduces complexity by using simple cell-wide information in neighboring cells. We evaluate the performance of our scheme through simulation under various load levels and user mobility conditions. Our results show that, when compared with a number of existing bandwidth reservation schemes as well as with no reservation scheme, our scheme achieves lower handoff dropping probability and comparable bandwidth utilization.