Controllable Positioning Service With UAV-Enabled Cooperative Jamming

Positioning services in cellular networks are at risk of being abused by unauthorized users, which may severely damage the interests of operators and legitimate users. In this letter, multiple unmanned aerial vehicles (UAVs) are employed as mobile jammers to disrupt the positioning services at unauthorized users, thereby enhancing the controllability of services at the physical layer. Specifically, we aim to jointly optimize the UAVs' locations and jamming power to maximize the minimum position error of unauthorized users, while ensuring that the needs of legitimate users are met. To solve this non-convex optimization problem, an iterative algorithm based on the block coordinate descent and successive convex approximation techniques is proposed and applied. Numerical results demonstrate that the proposed scheme could prevent the unauthorized use of positioning services and outperforms the benchmark schemes.