Automatic handover control for distributed load balancing in mobile communication networks

Abstract

In this paper, we propose an auto-tuning of mobility algorithm in the mobile communication systems as a load balancing self-optimization use case. This paper presents a distributed approach in which the traffic load can be balanced systematically by utilizing the effective load information of neighboring cells. The proposed load balancing scheme detects a load imbalance in the network and resolves the problem automatically by controlling the handover parameter as a nonlinear function of the load difference. Based on control theory, we analyze the adaptive behavior of the proposed controller and derive condition for system stability. Results from asymptotic analysis and simulation indicate that the proposed local controller of each individual cell effectively achieves the global properties, such that the load difference in the network is stabilized globally within a predetermined threshold. Extensive simulation results also show that the proposed scheme outperforms the existing methods by reducing call blocking rate of the overloaded cells.

Distributed Simplicial Homology Based Load Balancing Algorithm for Cellular Networks

“…Another method is to force the users to redirect from the overloaded cell to one of its neighbors that is underloaded. It can be done by modifying the hysteresis margin in the handover scheme between the overloaded cells and the underloaded cells, for example in [5], [20]. For more details about the handover scheme and the hysteresis margin, see [1].…”