[Press Release]Successful basic transmission of a Vehicle-to-Vehicle communication system using 5G signal and 5GHz-RIS inIntersection Environment

-Extends communication area even in environments with low radio diffraction to prevent accidents between vehicles.

A research laboratory led by Professor Hiroshi Harada of the Graduate School of Informatics, Kyoto University, has been investigating the use of an reconfigurable intelligent surface (RIS) , which can dynamically control the direction of radio wave reflection, to expand the communication area of a vehicle-to-everything (V2X) communication system using the 5 GHz band, which has low radio wave diffraction in environments outside of intersection sight lines. We conducted a basic transmission experiment using RIS operating in the 5 GHz band to transmit 5G signals in an outdoor environment and succeeded in expanding the non-line-of-sight transmission characteristics by a factor of nearly four. The results of this experiment made it possible to transmit information from a vehicle to other vehicles easily and over a wide area in an intersection non-line-of-sight environment, without the need for repeaters, etc., which are necessary for transmission and reception. This is expected to promote research and development related to the construction of cooperative communication networks for safety and security at intersections for automated driving and automated driving support.

More Information
https://www.dco.cce.i.kyoto-u.ac.jp/en/PL/PL_2025_03en.html