Abstract: Unmanned aerial vehicles have the advantages of on-demand deployment, high mobility and flexibility. The unmanned aerial vehicles-based full-duplex two-way relay network can further improve the coverage of the relay and enhance the communication performance. Therefore, the unmanned aerial vehicles assisted multi-pair ground users are considered to carry out two-way relay communication, and the average minimum reachable rate between user pairs is maximized by jointly optimizing unmanned aerial vehicles’ trajectory, user scheduling and power distribution. An iterative solution algorithm is proposed based on block coordinate descent and continuous convex approximation. Simulation results show that the proposed algorithm can effectively improve the system performance.

Key words: unmanned aerial vehicle communication, full-duplex two-way relay,  , user scheduling, trajectory optimization