Efficient Trajectory Planning for UAV-Relaying Maritime Communication Systems.

Unmanned aerial vehicles (UAVs) hold extreme importance within the Space-Air-Ground-Sea integrated network. This paper focuses on investigating the UAV trajectory planning problem in the maritime scenario, where vessel users transmit data to the onshore base stations (BSs) by a UAV relay. We aim to minimize UAV energy consumption while ensuring the amount of data for individual users. Then, we propose an efficient algorithm that jointly optimizes the UAV trajectory and the user scheduling with the successive convex approximation (SCA) technique. Numerical results provide validation for the effectiveness and superiority of the proposed scheme.