Trajectory Radius Optimization for Throughput Maximization of UAV Networks in Emergency Scenarios

Abstract

With the advantages of high mobility, flexible operation and on-demand deployment, the Unmanned Aerial Vehicle (UAV) is considered to be a promising application. Consideration of the damage to the ground base station (BS) in emergency scenarios, it is difficult for Internet of Things (IoT) nodes to exchange information with the outside effectively. In this article, a wireless information transmission network for UAV based on multiple IoT nodes is proposed, which the UAV serves as an aerial BS distributing data to the IoT nodes. According to the network, an optimization scheme for the radius of UAV trajectory is proposed. The goal is to maximize the achievable sum rate of all IoT nodes by optimizing the UAV trajectory radius, while meeting the constraint of average achievable rate of each IoT node. As the formulated problem suffers non-convexity, an efficient iterative algorithm is proposed to address it. Finally, the effectiveness of the proposed scheme is verified by the numerical results.