CAC for controlling handoff failure probability in Wideband CDMA Systems

The Call Admission Control (CAC) was one of the most important issues for resource management of Wireless Communication Systems. CAC made the decision of whether or not to accept the arriving (new or handoff) calls based on the predefined criteria considering the users' QoS as well as the utilization of network resources. It was began with a brief introduction of different CAC schemes based on the occupancy of the system resource or signal quality, and then emphasis on the CAC schemes for controlling handoff failure probability (Phf), including reserving resources, queuing and optimum CAC.