Millimeter wave (mmWave), reconfigurable intelligent surface (RIS), and unmanned aerial vehicles (UAVs) are considered vital technologies of future six-generation (6G) communication networks. In this paper, various UAV mounted RIS distributed to support mmWave coverage over several hotspots where numerous users exist in harsh blockage environment. UAVs should be spread among the maximize their ...

In order to be successfully executed, collaborative tasks performed by two agents often require a cooperative strategy learned. this work, we propose constraint-based multi-agent reinforcement learning approach called constrained soft actor critic (C-MSAC) train control policies for simulated performing multi-phase tasks. Given task with n $$ phases, the first − 1 n-1 phases are treated as cons...