Adaptive location management strategy to the distance-based location update technique for cellular networks

In this paper, we propose a new adaptive scheme in which an optimal distance-based update threshold is selected not only as a function of the call-to-mobility ratio, but also as a function of mobile´s traveling patterns, modeled by a transitional directivity index. We demonstrated that by means of the optimal threshold selection, the impact variations in the inter-ring transitional probability on the operational cost can be determined. Simulation results show that the additional information made available about roaming mobile´s transitional directivity is critical to ensure the realization of an optimal update threshold. Other advances include the simplification of the existing Markovian movement model presentation.