Risk assessment based LTE HetNet uplink power and interference control

Abstract

In Long Term Evolution Advanced (LTE-A) heterogeneous networks (HetNets) the choice of power control mechanisms is decisive for ensuring the required user throughput and for controlling the inter-cell interference (ICI) to be under a predefined limit. In HetNets different mobile stations (macro, pico, femto) have different transmission powers resulting in complicated interference scenarios raising the need for application of more efficient power and interference control. In this paper we propose an uplink power and interference control mechanism for HetNets based on a generalized risk management procedure. Based on this we propose a proactive algorithm for uplink power and interference control and illustrate it with a simulation in a simplified HetNet macro — pico cell scenario. Results from simulation experiments show that such an approach could be a solution for dynamic uplink power control in HetNets ensuring reduction of the ICI and increasing the average cell throughput.