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.

中文翻译：

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无人机协同干扰的可控定位服务


蜂窝网络中的定位服务存在被未授权用户滥用的风险，可能严重损害运营商和合法用户的利益。在这封信中，利用多架无人机作为移动干扰器，干扰非授权用户的定位服务，从而增强物理层服务的可控性。具体来说，我们的目标是联合优化无人机的位置和干扰能力，以最大限度地减少未经授权用户的位置误差，同时确保满足合法用户的需求。为了解决这个非凸优化问题，提出并应用了一种基于块坐标下降和逐次凸逼近技术的迭代算法。数值结果表明，所提出的方案可以防止定位服务的未经授权的使用，并且优于基准方案。