Abstract
Renewable energies are a good option to face the growing demand of energy consumption in the next generation cellular systems, where is expected a significant increase in the number of connected devices. However, there are still major challenges related to the optimization of grid consumption and energy management in cellular networks with hybrid energy sources (grid and renewable energy). In this paper, we compare two control schemes to reduce grid consumption in a heterogeneous cellular network (HetNet) powered by hybrid energy sources. Both schemes are based on a traffic flow method that offloads traffic to base stations powered by green energy. The first one is a reactive strategy that minimizes the grid consumption in each time slot. The second scheme uses a model predictive controller to incorporate forecast of green energy source behaviour. These schemes are evaluated in a simulation scenario, where it is possible to observe that the model predictive controller has a better response reducing grid consumption.
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