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Energy-Efficient Deployment of a Non-Orthogonal Multiple Access Unmanned Aerial System

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posted on 31.03.2021, 06:26 by Nithin BabuNithin Babu, Constantinos B. Papadias, Petar Popovski
In this work, we propose a methodology for the energy-efficient placement of an unmanned aerial system (UAS) deployed to collect data from a set of ground user equipments (UEs). The data-communication between the UEs and the UxNB, a radio access node carried by an unmanned aerial vehicle (UAV), of the UAS follows a non-orthogonal multiple-access (NOMA) scheme; in which all the UEs share the same time and frequency resources. The receiver removes the inter-UE interference from the co-channel UEs through joint implementation of a powerreduction technique at the UEs and the successive interference cancellation (SIC) at the receiver. Firstly, a new energy-efficiency metric, area energy efficiency (AEE) representing the total area covered by a UxNB per Watt-Hour (Wh) of energy consumed, is introduced. Then, the optimal hovering altitude of the UxNB that maximizes the AEE is determined using the proposed algorithm. Numerical evaluations show that the obtained solution using the proposed algorithm matches the globally optimal solution, and the proposed NOMA scheme prevails over an equivalent orthogonal multiple access (OMA) scheme, in terms of the AEE.

Funding

This work is supported by the project PAINLESS which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 812991.

History

Email Address of Submitting Author

nbabu@acg.edu

Submitting Author's Institution

The American College of Greece

Submitting Author's Country

Greece