Liu, "Power control for device-to-device communication with a hybrid relay
mode in unequal transmission slots," Electronics, vol.
To optimize the end-to-end performance, the UAV will carry out hybrid relay
selection to switch to a proper mode according its instantaneous CSI.
Teh, "Throughput of wireless-powered relaying systems with buffer-aided hybrid relay
," IEEE Transactions on Wireless Communications, vol.
Jiao, "Performance analysis of hybrid relay
selection in cooperative wireless systems," IEEE Transactions on Communications, vol.
In , authors reconsider the joint hybrid relay
scheme and resource allocation for achieving network capacity maximization.
By considering a hybrid relay
and several energy transmission nodes, the authors in  proposed an energy cooperation protocol and a dual cooperation protocol to maximize the average transmission rate.