Digital Communications Field (Harada Laboratory)

Research on 5th Generation (5G) / 6th Generation (Beyond 5G/6G) Mobile Communication Systems

Kyoto University's Harada Laboratory is currently conducting research on next-generation wireless communication systems (Beyond 5G/6G mobile communication systems). Wireless communication systems, typified by mobile phones, are transitioning from the 4th generation systems used worldwide to 5th generation (5G) systems that support a wide variety of use cases. Our laboratory is researching and developing the technologies needed to realize the 6th generation systems known as Beyond 5G or 6G, which will achieve even broader bandwidth and ultra-high-efficiency frequency utilization. Beyond theoretical research, we carry out implementation and demonstration experiments, producing advanced and practical research results in the field of digital communications that contribute to society.

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Faculty

Hiroshi HARADA

Professor (Course of Communications and Computer Engineering, Graduate School of Informatics)

Research Themes

• Next-generation (Beyond 5G, 6G) mobile broadband communication systems
• Wireless signal processing, high-efficiency wireless access technology
• Software-defined radio technology, cognitive radio technology
• Dynamic spectrum access technology
• White space wireless communication technology
• Wireless M2M / IoT communication systems (Wi-SUN systems)
• Information and communication platform / wireless emulation technology

Contacts

Kyoto University Yoshida Campus, General Research Building No. 9 South Wing, Room S407
TEL: +81-75-753-5317
FAX: +81-75-753-4982
E-mail: hiroshi.harada ＠ i.kyoto-u.ac.jp

Yusuke KODA

Associate Professor (Course of Communications and Computer Engineering, Graduate School of Informatics) 

Research Themes

• Sub-terahertz and terahertz wireless communication systems
• Radio wave propagation measurement and modeling
• Wireless communication technology using machine learning
• Wireless communication technology applying image processing techniques
• V2X wireless communication technology

Contacts

Kyoto University Yoshida Campus, General Research Building No. 9 South Wing, Room S409
TEL: +81-75-753-5316
FAX: +81-75-753-4982
E-mail: koda ＠ i.kyoto-u.ac.jp

Research Themes and Development Overview

Research on Next-Generation (Beyond 5G/6G) Mobile Broadband Communication Systems

We are conducting research to realize highly efficient broadband mobile communication systems that use not only conventional microwave and UHF (Ultra High Frequency) mobile phone bands, but also VHF (Very High Frequency), UHF low bands, ITS (Intelligent Transportation System) bands, millimeter waves, and terahertz waves, centered mainly on the following projects.

Next-Generation Cellular Mobile Communication System Research Project (Full-Duplex, Cell-Free Network, V2X, Open-Source Wireless Communication Systems, etc.)

As research and development toward international standard (3GPP) systems oriented for the 6th generation and beyond, this project conducts comprehensive research and development—from scheme proposals to implementation, demonstration experiments, and real-virtual space cooperative emulator implementation—on full-duplex communication, which transmits and receives simultaneously on the same frequency; Cell-Free Network, a new architecture that fundamentally rethinks the concept of cellular networks; V2X (Vehicle-to-Everything) wireless communication systems, which connect next-generation mobility and everything else to realize safe autonomous driving; and open-source wireless communication systems, which flexibly build systems using open-source software and general-purpose hardware.

Millimeter-Wave and Terahertz-Wave Wireless Communication System Research Project

This project conducts research and development—covering radio wave propagation measurement, propagation modeling, development of ultra-wideband wireless communication testbeds, proof-of-concept field experiments, and the development of transmission schemes and wireless access protocols—to achieve ultra-wideband, high-speed communication exceeding gigabits per second using frequency bands known as millimeter-wave and terahertz-wave, which are higher than conventional mobile phone frequencies.

Research on Dynamic Spectrum Access
Communication

Cognitive Radio / White Space Communication Research Project

This research project develops frequency management schemes, communication schemes, and communication protocols for using white space—frequency bands that are spatially and temporally available within bands already allocated for specific purposes—as frequency for 5th generation wireless communication systems, without causing interference to existing users.

Research on Wireless M2M (Machine-to-Machine) / IoT (Internet of Things) Communication Systems

Wi-SUN Communication System Research Project

In 5th generation mobile communication systems, it is necessary to accommodate not only human users but also a large number of measurement devices—such as sensors, meters, and monitors—installed at fixed and mobile locations to realize disaster prevention, mitigation, safety, and security. This research project develops a low-power wireless communication system, Wi-SUN (Wireless Smart Utility Network), that can be used not only with power supply but also with battery-powered sensors, meters, and monitors, focusing particularly on communication schemes and communication protocols. The research results have been standardized through the Institute of Electrical and Electronics Engineers (IEEE), the Wi-SUN Alliance, and other bodies.