Ultra-high-speed wireless backhaul connecting edge and core networks
Realizing communication speeds of up to 25 Gbps within a 1 km range
Wired backhaul and redundancy can help you cope with crises.


PC and smartphone users use Internet services connected to the telephone company's core network via a nearby mobile base station.

Backhaul, the connection between the base station and the telephone exchange, is typically implemented through wired connections, typically utilizing optical cables or copper wires. However, wired systems face numerous installation constraints, such as the difficulty of laying new cables depending on the environment, and are also time-consuming and expensive to build.

The Electronics and Telecommunications Research Institute (ETRI) announced on the 1st that it has developed wireless backhaul technology that supports ultra-high-speed communications. Utilizing the 70-80 GHz millimeter wave (mmWave) band, this technology enables communications at speeds of up to 25 Gbps within a 1-kilometer range by installing a hub in the core network and a terminal at the base station.

The research team developed this technology by utilizing ▲phase noise removal technology ▲polarized interference minimization technology ▲dual-polarized integrated modem technology ▲commercial 25Gbps optical transceiver technology.

The wireless section communication transmission speed of existing wireless backhaul technology was up to 10 Gbps, but the research team's technology exceeds the maximum transmission speed (20 Gbps) of 5G mobile communication base stations. Therefore, it is expected to be of great help in building base station infrastructure to provide 5G services.

Compared to new installations, the cost can be reduced by approximately 20%, making it economical. By utilizing wireless backhaul to complement wired networks and provide redundancy, even in the event of a fire or other disruption, a stable communication environment can be established and speed reductions can be minimized.

ETRI's wireless backhaul technology supports both point-to-point and point-to-multipoint wireless transmission methods. Because it provides a user interface based on Ethernet standards, it is compatible with existing base station products, making it advantageous for commercialization.

This technology has undergone field trials in networks for 5G media services. The research team plans to transfer the technology to wireless communications equipment companies and others for use in 5G communication centers, small cells, and other areas.

In addition, research is being conducted on backhaul technology, which connects ground stations and mobile base stations equipped with small cells mounted on aerial unmanned vehicles such as drones, to solve problems such as emergencies that occur in areas with weak communication networks, such as mountainous regions or remote islands.