Simultaneous wireless information and power transfer to increase energy efficiency of 5G

A research team of Tomsk Polytechnic University together with foreign colleagues fulfilled a substantial work having summarized all available knowledge related to the technology for wireless power transmission over long distances via 5G mobile communication networks.



TPU researchers together with colleagues from the University of Luxembourg (Luxembourg), the University of Western Ontario (Canada) and the University of Edinburgh (UK) are working on efficient power transfer over long distances with minimum losses. In particular, it was developed an algorithm that makes it possible to transfer power from device to device along with RF mobile signals.

Currently, power efficiency becomes a major challenge for telecommunication community and the development of 5G-technology is imperative. Ultra top-notch videos and better widescreen resolutions in mobile devices are forcing us to look for better sustainable power sources. As a result, the community is focused on the development of new technologies and strategies for resource distribution to increase the self-sufficiency of wireless connections. Wireless power transfer (WPT) is one of the technologies which enables energy harvesting from external sources or a dedicated RF signal and improving the self-sufficiency of the system. Simultaneous wireless information and power transfer (SWIPT) is a new paradigm that allows wireless nodes to recharge their batteries from the RF signals while information decoding.

Scientific supervisor of the project, a professor of the Research Laboratory for Information and Telecommunication Systems of School of Computer Science & Robotics Nalin Jayakody says:


‘The use of simultaneous wireless information and power transfer provides solutions to a number of problems in WPT, which can lead to notable gains in terms of power consumption, spectral efficiency, and interference control in wireless communications.’


The paper Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges was published in IEEE Communications Surveys and Tutorials (IF: 17.18). Authors of the survey are Prof Nalin Jayakody and research engineer Tharindu D. Ponnimbaduge Perera from TPU, as well as scientists from the University of West Ontario and the University of Luxembourg.


‘This paper provides a comprehensive summary of SWIPT and related concepts such as WPT, RF Energy Harvesting and Interference Exploitation with comparative tables and illustrative figures. In addition, the paper introduces one of the uprising topics in the wireless communication domain, Interference Exploitation with a basic analysis of interference. Our objective is to provide foundational knowledge of SWIPT, as well as some suggestions on productive areas for further research in related to SWIPT concept,’ specifies Jayakody.


Besides, the paper imposes for discussion prospective development of SWIPT and its applications at present, including recommendations on various aspects such as planning, hardware disorders, channel coding techniques, the study of feedback and information systems to improve the efficiency of communication systems supporting SWIPT and so on. 


Within the paper, the scientists have identified a number of problems, both unique for SWIPT and for the development of communication systems as a whole: the distribution of resources in communication systems supporting SWIPT, hardware disorders, the study of channel status in the network, channel coding methods, secure transmission, SWIPT support for device-to-device connecting, etc. Currently, according to the authors, work on these issues is still underway. At the same time, the researchers identified a number of priority areas in each of the sections of the new SWIPT communication technology.


SWIPT techniques should be integrated with common relay protocols. Researchers need to focus on improving algorithms for correcting errors in coding, it is given in the article.


As for the future of the next-generation connections, one of the main challenges in this direction is, according to the authors, improving energy efficiency that will make it possible to minimize both additional expenditures for wireless operators and the harmful impact of information and communication infrastructure.