[더리포트] A domestic research team succeeded in demonstrating an augmented reality (AR) service with mobile backhaul communication technology in the subway through international joint research with the UK. This is expected to smoothly enjoy various multimedia such as high-definition video streaming even in moving environments such as buses and subways.
At the end of last month, the Electronics and Telecommunications Research Institute (ETRI) succeeded in demonstrating 5G service using a high-frequency wireless backhaul system in the subway line between Jamsil Station and Songpa Station on Subway Line 8.
The demonstration on this day is 1.9Gbps, which is 30 times faster than the previous one. The AR immersive multimedia service can be used by 190 people at the same time.
According to the Korea Electronics and Telecommunications Research Institute on the 11th, the average download speed of the wireless LAN service provided by mobile operators in the subway is 58.50Mbps, which is even lower during commute times when passengers are crowded. In such a communication environment, there is a limit for users to use large-capacity multimedia services.
The researchers supplemented and developed the “Ultra-high frequency-based wireless backhaul system” that connects to the Internet using millimeter-wave frequencies in the Unspecified Frequency Band (FACS) and applied it to the Seoul subway.
ETRI installed a base station system in five sections of the subway tunnel, a gateway and a server in the communication room of Jamsil Station, and a terminal system in the cab of the subway to create a communication demonstration environment.
The demonstration site selected the section between Jamsil Station and Songpa Station of Subway Line 8, which has the most curvature in the Korean subway, in order to check whether it achieves sufficient performance beyond the limit of the frequency characteristic with strong straightness.
The demonstration was conducted in the form of measuring the transmission speed in a running subway and experiencing an immersive multimedia service at the platform at Songpa Station. In particular, in this demonstration, a new advertising service model was applied in which users receive customized content by transmitting advertising content.
The researchers succeeded in demonstrating wearing shoes with AR technology by connecting a smartphone app with AR glasses using a signage monitor that advertises the latest sneakers.
It is expected to have a great ripple effect on the advertising market in the future.
To demonstrate the AR immersive multimedia service wearing the latest shoes, a transmission rate of about 10Mbps is required, but ETRI announced that it has confirmed the maximum transmission rate of 1.9Gbps between the base station system and the terminal.
The researchers saw beamforming technology that concentrates the transmission signal on the required terminal and handover technology that naturally maintains the connection without losing data even when the base station connected to the terminal changes while the subway moves. It is said that it is the key to the performance.
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