Energy-Efficient Cluster Sizing for User-Centric Air-to-Air Networks

In this letter, we propose a novel 3D joint transmission framework for user-centric air-to-air communication in unmanned aerial vehicles (UAVs) networks. The proposed framework clusters aerial base stations (ABSs) to cooperate on a dynamic basis, thereby enhancing the aerial user equipment (AUEs) performance. Using stochastic geometry, a new expression for the spectral efficiency (SE) with respect to the ABSs cluster size is derived. Finally, the optimum cluster size that maximizes the energy efficiency (EE) is investigated.