A location management scheme for heterogeneous wireless networks

One of the most challenging problems in global mobility management is location management which consists of keeping track of mobile users who leave their home network and roam into foreign networks that use different technologies and protocols. In this paper, we propose a model which improves location management efficiency in heterogeneous wireless networks. Such a model essentially consists of adding at the boundary location area between two different subsystems a specialized equipment called LR-ING (location register and Internetworking gateway) which is connected to the home location register (HLR) of both subsystems. Numerical results reveal that the proposed scheme enables to significantly reduce the signaling cost generated by the databases.