Power allocation for multi-homing heterogeneous network aided by energy harvesting

In this paper, we consider an energy harvested heterogeneous network where the base stations (BSs) in each tier is powered by different energy harvesting unit, which leads to time-and-spatial variable power assumption for both downlink and uplink transmitting. Then, an optimal power allocation method for maximizing system transmission rate under multi-homing scenario is investigated with the consideration of service quality requirements of mobile terminals (MTs). Based on the optimization framework, we further propose a simplified power allocation scheme. Simulation results demonstrate that the proposed algorithm is capable of approaching the optimal system capacity as well as reducing the computational complexity compared to the optimal method.