A probabilistic paging technique for location management in PCS networks

Location management (LM) is how to find a mobile terminal (MT) current location on the move. Location update (LU) and paging must be maintained efficiently to minimize location management cost in personal communication service networks (PCS networks). In this paper we introduce a new location update and paging techniques, the location update is concerned with location tracking which is based on geographical position of the mobile terminal with time aspects. The locations are saved in the mobile cache in means of cell ID and time interval, the tracking process is totally managed by the MT´s current visitor location register (VLR), the location data is transferred from the mobile cache to the VLR when the mobile terminal crosses a pre-defined number of cells, or when a pre-defined number of time intervals is reached. The paging is done according to probability of existence for the mobile terminal to the location data saved in VLR. The proposed techniques in this paper reduce location management cost compared to existed location management methods.