Position based Throughput Maximization of Multi-UAV-assisted Relay Networks

Abstract

In this work, we investigate the performance of best downlink signal to noise ratio (BDS) based unmanned aerial vehicle (UAV) selection scheme in multi-UAV relaying network, where multiple UAVs assist the communication between two ground users (GUs). Firstly, the best UAV is selected using BDS based selection criterion, then, the closed form expressions for the outage probability and throughput of the multi-UAV assisted relay network are derived considering Nakagami-m distributed fading channels. Furthermore, an optimization problem is formulated to ensure maximum system throughput performance by finding the optimal 3D-coordinates (position) of the selected UAV. In addition to this, we derive an upper bound to the system throughput which simplifies the optimization problem and is used in finding a sub-optimal solution to the optimization problem. By Monte Carlo simulation, we validate all the results.