Securing Mobile Multiuser Transmissions with UAVs in the Presence of Multiple Eavesdroppers

TL;DR

This paper proposes an optimized UAV deployment and power control strategy to enhance the secrecy energy efficiency of multiuser ground transmissions against eavesdroppers.

Contribution

It introduces a joint optimization framework for UAV positioning and user power control to improve secure communication in multiuser UAV-assisted networks.

Findings

Optimized UAV placement improves secrecy energy efficiency.

Joint power and position optimization enhances security against eavesdroppers.

Iterative algorithm effectively solves the nonconvex problem.

Abstract

This paper discusses the problem of securing the transmissions of multiple ground users against eavesdropping attacks. We propose and optimize the deployment of a single unmanned aerial vehicle (UAV), which serves as an aerial relay between the user cluster and the base station. The focus is on maximizing the secrecy energy efficiency by jointly optimizing the uplink transmission powers of the ground users and the position of the UAV. The joint optimization problem is nonconvex; therefore we split it into two subproblems and solve them using an iterative algorithm.