Altitude and Power Optimization for Coexisting Aerial and Terrestrial Base Stations

Abstract

The wireless communication field is getting closer to the integration of the unmanned aerial vehicle (UAV) and cellular network for further enhanced service quality. In this paper, we study a wireless communication system with coexisting aerial and terrestrial base stations, which respectively serve their associated users. By taking into account the mutual interference between the aerial and terrestrial communication links, we study the impact of the aerial base station (ABS) altitude and transmit power on the system's downlink and uplink data rates. In many situations, the results show that the optimal ABS altitude and transmit power are either the maximum or the minimum possible values depending on, for instance, the relative proximity between the ABS, the ABS user (AU), and the terrestrial base station user (TU).