Development of 'Real-Time Flex-Duplex' Technology Applicable to 5G Communication Systems Using NI Solutions
Published2017.12.11 09:42National Instruments announced that domestic research teams have developed 'Real-Time Flex-Duplex Radio' technology applicable to 5th generation (5G)/Beyond 5th generation (B5G) communication systems using NI solutions for the first time in the world.
The research team led by Professor Kim Sung-ryun and Professor Chae Chan-byung from Yonsei University showcased this real-time flex-duplex technology at the NI booth during 'IEEE GLOBECOM 2017' held in Singapore from December 4-8.
While millimeter-wave (28GHz, 37GHz, etc.) band technology is primarily expected to be utilized in 5G/B5G, sub-6GHz spectrum remains important. The Yonsei University research team successfully developed a frequency resource sharing-based real-time multilayer flex-duplex technology that senses existing radio conditions in the sub-6GHz spectrum to identify unused bands and flexibly utilizes multiple duplexing technologies such as Full-Duplex Radio and Half-Duplex Radio depending on circumstances.
For the demonstration, the research team transmitted sensed channel information to a remote server to generate a probabilistic map, and received the computation results back at the exhibition system to apply the flex-duplex technology. Notably, for this development and demonstration, the team used NI USRP-RIO for channel sensing, and NI PXI-based FlexRIO and NI 5791 transceiver for actual transmission and reception.
Through this real-time flex-duplex technology, the research team achieved network-level transmission rates up to twice as fast as conventional full-duplex technology. In other words, compared to the current half-duplex-based LTE system, a 4-fold speed was achieved without additional frequency allocation. This can reduce spectrum auction costs reaching trillions of won and bring us one step closer to 5G/B5G. Additionally, by combining multiple antenna technology with this, even faster transmission rates can be achieved. This technology development has laid the foundation for Korea to lead next-generation mobile communication standardization and advance-commercialize related technologies.
Professor Chae's research team is participating in NI's Lead User Program for the first time in Asia and has previously demonstrated in-real-time full-duplex technology in 2014, and real-time multi-antenna full-duplex technology jointly with LG Electronics for the first time in the world in 2015. Additionally, in 2016, they showcased wideband full-duplex technology and lens-based millimeter-wave technology. Meanwhile, at the GLOBECOM conference last week, Professor Chae's research team demonstrated low-loss high-gain RF lens antenna technology for millimeter-wave bands together with domestic company Sensorview (CEO: Kim Byung-nam).
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