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Energies 2018, 11(3), 617; https://doi.org/10.3390/en11030617

Accounting for Energy Cost When Designing Energy-Efficient Wireless Access Networks

1
Department of Electronics and Telecommunications (DET), Polytechnic University of Turin, 10129 Turin, Italy
2
Department of Information Technology, Ghent University/IMEC-WAVES, Technologiepark-Zwijnaarde 15, B-9052 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Received: 24 January 2018 / Revised: 17 February 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
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Abstract

Because of the increase of the data traffic demand, wireless access networks, through which users access telecommunication services, have expanded, in terms of size and of capability and, consequently, in terms of power consumption. Therefore, costs to buy the necessary power for the supply of base stations of those networks is becoming very high, impacting the communication cost. In this study, strategies to reduce the amount of money spent for the purchase of the energy consumed by the base stations are proposed for a network powered by solar panels, energy batteries and the power grid. First, the variability of the energy prices is exploited. It provides a cost reduction of up to 30%, when energy is bought in advance. If a part of the base stations is deactivated when the energy price is higher than a given threshold, a compromise between the energy cost and the user coverage drop is needed. In the simulated scenario, the necessary energy cost can be reduced by more than 40%, preserving the user coverage by greater than 94%. Second, the network is introduced to the energy market: it buys and sells energy from/to the traditional power grid. Finally, costs are reduced by the reduction of power consumption of the network, achieved by using microcell base stations. In the considered scenario, up to a 31% cost reduction is obtained, without the deterioration of the quality of service, but a huge Capex expenditure is required. View Full-Text
Keywords: wireless access network; energy price; demand and response; energy efficient; power consumption; LTE-Advanced; power grid; renewable energy; solar energy; energy storage wireless access network; energy price; demand and response; energy efficient; power consumption; LTE-Advanced; power grid; renewable energy; solar energy; energy storage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Vallero, G.; Deruyck, M.; Meo, M.; Joseph, W. Accounting for Energy Cost When Designing Energy-Efficient Wireless Access Networks. Energies 2018, 11, 617.

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