Efficient call admission control for heterogeneous services in wireless mobile ATM networks

An efficient call admission control scheme for handling heterogeneous servi ces in wireless ATM networks is proposed. Quality-of-service provisioning o f jitter bounds for constant bit rate traffic and delay bounds for variable bit rate traffic is used in the CAC scheme to guarantee predefined QoS lev els for all traffic classes. To reduce the forced handoff call dropping rat e, the CAC scheme gives handoff calls a higher priority than new calls by r eserving an appropriate amount of resources for potential handoff calls. Re source reservation in the CAC scheme makes use of user mobility information to ensure efficient resource utilization. Simulation results show that the proposed CAC scheme can achieve both low handoff call dropping rate and hi gh resource utilization.