An improved movement-based location management scheme for PCS network

Location management is a key issue in the operation of wireless networks. A lot of location management schemes have been proposed. The movement-based location management strategy is the one that is not only efficient but also easy to implement. However, when the number of roaming users increases, the access to the home location register (HLR) and the associated signaling cost may increase explosively under the movement-based strategy. In this paper, we introduce the concept of master HLR and current HLR. In our presented scheme, the mobile terminal (MT)'s HLR is changed dynamically and the MT will always be served by its nearest (current) HLR. A follow up simulation study shows the proposed scheme gives better performance than current movement-based schemes in term of location management cost.