Location Management in 3G Networks using a 2-Level Distributed Database Architecture

In this paper, we introduce a 2-level distributed database architecture combined with the Group Registration (GR) location tracking strategy to be used in 3G wireless networks. With this strategy, the total location management cost is reduced by updating the location of MTs (Mobile Terminals) in an RA with a single route response message to the HSS (Home Subscriber Server). The Location Registration and Call Delivery procedures are presented in detail. The extensive analysis of the numerical results shows that the GR strategy integrated with a 2-level distributed databases architecture in 3G networks can achieve a significant reduction of the total cost per call arrival, as well as, a reduction of the call delivery latency, compared to the corresponding costs of the distributed databases without the GR strategy and the GR strategy without distributed databases.