Performance optimization of an improved movement-based location update scheme in real PCS networks

Abstract

In this paper, an improved movement-based location update (iMBLU) scheme is proposed to reduce the location update (LU) cost of the conventional movement-based location update (CMBLU) scheme. The main idea is that instead of simply keeping counts of the number of cell boundary crossings, the counter of a mobile station (MS) stores the distance information between the currently residing cell and the last registered cell and an LU is performed whenever the counter value reaches a predefined threshold, called movement threshold. Unnecessary LUs are avoided when the MS moves around the recently visited cells. Simulation results demonstrate that the iMBLU scheme has achieved a considerable reduction in LU cost compared to other schemes under irregular cell configuration in real personal communication service (PCS) networks. © 2014 Springer International Publishing.