Hyundai Engineering & Construction has received Korean government approval to apply TVWS (TV White Space) to enable seamless data communication throughout the tunnels. TVWS is the spectrum of TV frequencies not used for broadcasting.

This improves safety of tunneling workers.

This technology does not need repeaters (LTE).

Everything explained in Hyundai E&C press information in English and Aju Business Daily.

https://www.ajudaily.com/view/20221025145914260