Location Management Model Based on Movement Directions for PCS Network

In this paper,the location management problem in PCS network is studied.An adaptive direction based location update (ADBU) scheme is proposed in which an adaptive direction based scheme is formulated for location update generation.Mobile terminals inspect their directions and a location update will be generated when the change in the direction is greater than the direction threshold.In the paper,a Gauss Markov process is used to model the movement of a mobile terminal.With a feedback control mechanism,the optimal value for the direction threshold with the attempt to minimize the cost is estimated.Results have shown that the location management cost performance of ADBU is significantly better than the line paging scheme and the distance? based scheme.