Minimum Transmission Protocol for Full-Duplex Systems With Energy Harvesting

A bi-node full-duplex communications system, in which both nodes are assumed to have the capability of energy harvesting (EH), is investigated. In the proposed model, node B harvests radio frequency energy that dissipated by node A, to which the former will transmit its signal back simultaneously. Furthermore, by exploiting node B's critical information, including its channel state information and the usage of its battery, a minimum transmission protocol is proposed by employing two kinds of EH-manners. Note that node B is allowed to always transmit, provided that its residual energy is high enough to ensure a successful decoding at node A. In addition, the proposed protocol with capabilities of both EH and signal transmission can be developed by employing a Markov-chain model, following which we can derive both the stationary distribution and the outage probability of node A. Finally, numerical results validate the proposed theoretical analysis.