Industrial Internet of Things (IIOT) is a technology that combines wireless sensors, controllers, and mobile communication technologies to optimize industrial production processes. Ensuring effective data and electricity transmission for IIOT devices operating on batteries is crucial.
In this context, the wireless transmission of electricity based on radio frequency signals has gained significant attention. Specialists in the IIOT field are particularly interested in the technology of simultaneous wireless transmission of information and energy (SWIPT).
However, existing SWIPT systems face challenges in energy efficiency over long distances from the central controller. The team of researchers from South Korea, led by Professor Dong-Wook CEO, has developed a new approach using SWIPT for a distributed antenna system (DAS). This approach significantly improves the energy and spectral efficiency of IIOT.
“By utilizing DAS with antennas located closer to users, the loss of SWIPT due to distance is minimized, thereby enhancing the productivity of information and energy collection,” explains Dr. CEO.
As part of their studies, a three-stage iterative algorithm was developed to maximize the effectiveness of the SWIPT-NOMA-DAS system. The findings of the study were published in the journal IEEE Transactions on Industrial Informatics.
The tests conducted demonstrate that the proposed SWIPT-NOMA-DAS system is five times more energy-efficient than SWIPT-NOMA without DAS. Additionally, it delivers over 10% improvement in performance.
Dr. CEO highlights the significance of this study, stating, “This technology offers highly efficient energy consumption and various advantages, such as convenience, low energy consumption, and extended battery lifespan. It can be applied to smartphones, laptops, wearable devices, and electric vehicles. The SWIPT-NOMA-DAS system enables resource optimization and efficient wireless charging and data transmission for users in the IIOT environment.”