KT announced on Feb. 12 that it has applied a mesh structure to its 5G backbone network for the first time in Korea to provide high-quality, ultra-low-latency 5G communication service.
A mesh structure refers to a traffic processing structure where regional centers are directly connected among themselves to allow traffic to be processed without passing through a metropolitan center.
5G requires a transmission speed of 20 Gbps, which is 20 times faster than LTE, and one tenth of delay time. To meet these requirements and process large-capacity traffic at ultra-low latency, it is important to reduce latency in the wireless network, but it is also important to prevent the delay in the backbone network that occurs when traffic is transmitted across the whole country.
To minimize the delay in the backbone network and provide high-quality ultra-low-latency 5G service, KT applied a mesh structure to its 5G backbone network that significantly reduces the inter-regional traffic transmission delay.
In the current backbone network including LTE, there is no direct connection between regions, meaning that inter-regional traffic has to pass through the metropolitan center. As a result, a transmission delay is bound to occur due to the increase in traffic transmission distance. High-quality 5G service requires a backbone network that is different from the current one.
The mesh structure adopted by KT provides direct connections among major regional centers in the nation, significantly reducing the transmission delay in processing inter-regional traffic.
In addition, the mesh structure is expected to allow provision of more stable 5G service by improving network survivability through diversified connection paths among regional centers, which can provide alternative routes in the case of a specific area failure. KT plans to provide high-quality 5G service by minimizing latency through a mesh backbone network.