Experiment of power and data transmission scheduling for single wireless LAN sensor

In wireless sensor networks, individual nodes must be batteryless to make themselves maintenance-free, which is particularly important for networks that have an enormous number of nodes. Wireless and batteryless sensors can be powered by energy harvesting or wireless power transmission, and they store energy in capacitors. Microwave power transmission is a wireless power transmission scheme that can interfere with data transmission. It necessitates scheduling of data and power transmission. In addition, to ensure network sustainability, a constant amount of energy should be stored in the capacitors. In the experiments conducted in this study, a node is not charged while transmitting data or receiving beacon signals that contains delivery traffic indication message elements (DTIM) to avoid interference. Moreover, it is powered by a solar panel to emulate microwave power transmission. In addition, sleep periods are scheduled by the node to ensure that a constant amount of energy remained in the capacitor.