摘要：In this paper,a call admission control scheme based on user position information is proposed in the context of CDMA2000 and WLAN hererogeneous networks with voice and data traffic.The user position based call admission (UPBAC) scheme is composed of a parameter measurer,an new call or a handoff call arrives,the parameter of available subnetwork as well as the position and mobility information for the admission controller. the admission controller then decides whether to admit or reject the decision executer carries out the final actions at last. Simulation results show that UPBAC can always reduce pingpang effect while maintaining the QoS requirements in that it can appropriately admit or reject the users' sdmission requests. Also,the UPBAC can achieve lower blocking rate than conventional algorithms such as RSS based algorithm or WLAN first algorithm and can significantly reduce the handoff dropping rate by effective load balancing.
