A Novel Wireless Information and Energy Transfer Protocol in Wireless Body Area Network with Two-way Relay

Abstract

Aiming at the problem of the amount of relay nodes and the complexity of the network in the Wireless Body Area Network (WBAN), this paper proposes a simultaneous transmission model of information and energy using its own nodes as relays. This model decreases the amount of nodes in the network and reduces complexity of the WBAN and the cost. In this model, the relay node can send its own collected information to the source node, and can also serve as a relay node to help the source node and the destination node to transmit energy and information. In this article, the time switching (TS) protocol is adopted. The relay uses a decoding and forwarding scheme for the signal. In this paper, the nonlinear programming algorithm can be used to find the optimal solution of the system and get the best throughput in the model. Finally, it is verified by simulation experiments. The simulation makes the influence of each parameter on the throughput and determines the connection between the optimal throughput and the distance. The result shows that the location close to the destination node is the optimal relay node location, which verifies the validity of the model and protocol.