Two Energy Harvesting Protocols for SWIPT at UAVs in Cooperative Relaying Networks of IoT Systems

This paper presents two protocols in non-orthogonal multiple access (NOMA) network, namely base station (BS), based power splitting protocol (PSR) and BS based time switching protocol (TSR), for simultaneously wireless information and power transmission (SWIPT) based unmanned aerial vehicles (UAVs) which are employed in power domain NOMA based UAV communication network. The system model with k types of the UAV, one BS, and two users’ devices is investigated in our work. Besides, a strategy of UAV selection is also studied. Closed-form expressions of outage probability and throughput for UAVs and both users’ devices are derived. In particular, the outage probability is determined for both perfect and imperfect SIC. The numerical results show that the performance for BS-based PSR outperforms that for BS-based TSR. The analytical results match Monte Carlo simulations.