Mobility management and call admission control for IEEE 802.16e wireless networks

Abstract

The demand for wireless broadband access systems supporting mobility of the individual users has dramatically increased in recent years. Therefore, techniques for dynamically adapting the resources to the link condition become necessary for achieving high spectral efficiency. Our aim in this paper is to develop an admission control scheme that handles the intra-cell mobility issue in IEEE802.16e Wireless Networks with link adaptation. In particular we consider two types of intra-cell mobility: Low-mobility and High-mobility. We show how the admission threshold may adaptively controlled to achieve a better balance between guaranteing dropping probability and maximizing resource utilization. Simulation results show that the call admission control scheme under different types of mobility outperforms well by reserving amount of resource in order to provide an high priority of migration calls.