Optimizing the Age of Information in RIS-Aided SWIPT Networks

In this letter, a reconfigurable intelligent surface (RIS)-assisted simultaneous wireless information and power transfer (SWIPT) network is investigated. To quantify the freshness of data packets at receiver, age (AoI) considered. minimize sum AoI users while ensuring that transferred to energy harvesting greater than demanded value, we formulate scheduling scheme, joint transmit beamforming phase shift optimization base station (BS) RIS, respectively. The alternating (AO) algorithm proposed handle coupling between active passive RIS shifts, successive convex approximation (SCA) utilized tackle non-convexity formulated problems. improvement in terms provided by trade-off quantified numerical simulation results.