Resource Management for Wireless Power Transfer and Wireless Information Transfer in Industrial IoT

Wireless power transfer (WPT) is a promising technology that supplies power to Internet-of-Things (IoT) devices wirelessly. In general, the transmission power of WPT is much higher than that of wireless information transfer (WIT). Thus, careful design is necessary for WPT and WIT to avoid the devastating interference caused by WPT to WIT. This paper considers an interference avoidance from WPT to WIT in the time domain (TD) and frequency domain (FD) to enable the coexistence of WPT and WIT in an industrial IoT (IIoT) environment. The simulation results elucidate that the FD allocation is superior to the TD allocation from the viewpoints of interference avoidance and battery charging capability. It is shown that the average total data size that can be collected from WPT-powered wireless devices (WDs) accommodated by the FD allocation is more than 25% higher than that when WIT and WPT operate independently.