Abstract-In this letter, we deal with the age of information (AoI) for a sensor network with wireless power transfer (WPT) capabilities. Specifically, we study a simple network topology, where a sensor node harvests energy from radio frequency signals (transmitted by a dedicated energy source) to transmit real-time status updates. The sensor node generates an update when its capacitor/battery becomes fully charged and transmits by using all the available energy without further energy management. The average AoI performance of the considered greedy policy is derived in closed form and is a function of the capacitor's size. The optimal value of the capacitor that maximizes the freshness of the information, corresponds to a simple optimization problem requiring a 1-D search. The derived theoretical results provide useful performance bounds for practical WPT networks. Index Terms-Age of information, wireless power transfer, energy harvesting, sensor networks.
In REF , the performance of a WPTpowered sensor network in terms of the average AoI was studied.
Average Age of Information in Wireless Powered Sensor Networks
IEEE Wireless Communications Letters
IEEE Wireless Communications Letters
Computer Science Mathematics Engineering