KT Demonstrates 28GHz Band Enterprise 5G Network Technology
Published2019.10.31 16:18The world's first 28GHz 5G equipment and terminals
Wireless transmission time unit lowered to 0.125ms
Network technology utilizing the mmWave band frequency, which can be called true 5G, has been introduced for the first time.
On the 31st, KT demonstrated its enterprise-only 5G network technology, aka FAST.NET, using the 28GHz band frequency at the KT 5G Open Lab in Seocho-gu, Seoul.
5G FAST.NET technology is KT's ultra-low latency infrastructure technology that enables round-trip data transmission from terminals to networks and services with a latency of less than 10ms. It is a core technology for dedicated enterprise 5G networks, which will enable autonomous vehicles and smart factory automation control in the future.
The demonstration demonstrated ultra-low latency data transmission of at least 5ms and an average of 8ms in an actual wireless environment using the world's first 5G base station equipment and terminals supporting the domestic 28GHz band. It was actually tested through linkage with core network equipment based on the 5G standard MEC (Mobile Edge Computing) specification.
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Currently, commercial 5G networks operating in the 3.5GHz band experience delays of 10-20ms. FAST.NET leverages ultra-high frequency signals at 28GHz to reduce the wireless transmission time unit from 0.5ms in the existing 3.5GHz band to 0.125ms, a quarter of the original 0.5ms. By further improving delay factors in both wireless and wired transmission sections, the overall delay time was reduced to 5ms.
In July, KT developed the first FAST.NET technology, which reduces data transmission delay to around 10ms by applying URLLC (Ultra Reliable Low Latency Communication) technology, which reduces wireless errors in the 3.5GHz band, minimizes data retransmissions, and eliminates unnecessary transmission procedures between base stations and terminals.
This time, by expanding the application of FAST.NET technology to the 28GHz mmWave system and proactively applying 5G standard MEC technology to the core, the company succeeded in reducing the overall round-trip delay time by half again. In the future, we plan to reduce round-trip delay time to an average of less than 5ms through additional performance improvements to base stations and terminals.
Lee Seon-woo, head of the KT Convergence Technology Institute's Infrastructure Research Center, said, "We will activate enterprise-only 5G services that require high reliability based on ultra-low latency transmission technology," and added, "We will continue to develop the 5G technologies needed for the enterprise-only 5G market and strive to commercialize them quickly."
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