KT successfully demonstrated 5G Non-Terrestrial Network (NTN) communication technology, addressing transmission delays typical in satellite communication. This achievement, developed in partnership with Rohde & Schwarz Korea and Viavi Solutions Korea, showcases efficient communication without retransmission techniques (HARQ-less), leveraging precise path loss calculations in free-space environments.
The test achieved 10 Mbps transmission over a 35,800 km geostationary satellite link, enabling full HD video transmission. Defined under the 3GPP Release 17 standards, 5G NTN expands 5G coverage using satellites instead of ground-based stations, overcoming signal issues like scattering and diffraction seen in terrestrial networks.
KT plans to present the technology at MWC 2025 and aims to extend coverage beyond terrestrial boundaries into aerial domains, such as low Earth orbit (LEO) satellites and high-altitude communication platforms (HAPS). This development positions NTN as a critical step toward ubiquitous 6G connectivity, with applications ranging from disaster response to expanded communication services.
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