User mobility oriented predictive call admission control and resource reservation for next-generation mobile networks

摘要

This paper addresses the problem of resource reservation (RR) and call admission control (CAC) in wireless mobile networks. A new user mobility oriented predictive scheme called PCAC-RR is proposed for call admission control and resource reservation. The main goal is to reduce the call dropping probability and the call blocking probability, and to maximize the bandwidth utilization. By analyzing the previous movements of the mobile users, we generate local and global mobility profiles for mobile users, which are utilized effectively in the prediction of the future path of a mobile user. Extensive simulation is used to study the performance of the proposed technique and to compare its performance with other two techniques: FR-CAT2 and PR-CAT4. Simulation results show that the proposed scheme has a significantly better performance compared to the other two schemes. (C) 2006 Elsevier Inc. All rights reserved.