SKT Achieves 1.4Gbps Speed with Global Manufacturers
Published2017.07.13 16:25Successful 1Gbps speed demonstration with Ericsson
SK Telecom announced that it succeeded in demonstrating a speed of 1.4Gbps across five commercial LTE frequency bands and a speed of 1Gbps using both LTE frequency bands and WiFi bands, together with global telecommunications equipment manufacturers.
SK Telecom, together with Nokia, succeeded in achieving the highest speed of 1.4Gbps based on SK Telecom's LTE frequency band.
To achieve a speed of 1.4Gbps, the two companies simultaneously applied '5-band CA' technology, which aggregates five frequency bands, and '4x4 multi-antenna technology,' which utilizes four antennas each for transmission and reception to achieve double the speed.
These two technologies are core 4.5G technologies that enhance data transmission speed and performance. SK Telecom achieved a maximum data transmission speed of 700Mbps using '5-Band CA' and increased the speed to 1.4Gbps by applying '4x4 Multi-Antenna Technology' to all five frequency bands.
Meanwhile, SK Telecom succeeded in demonstrating a speed of 1Gbps on a smartphone for the first time in the world by applying Licensed Assisted Access (LAA) technology with Ericsson.
'Unlicensed band frequency aggregation technology' is a technology that utilizes both LTE frequencies and unlicensed WiFi frequencies for LTE. The two companies utilized a total of 80 MHz wide frequency bands, including one 20 MHz wide LTE frequency band and three 20 MHz wide Wi-Fi frequency bands, and applied 4x4 multi-antenna technology to the LTE band.
In particular, the two companies applied the Listen-Before-Talk (LBT) technology, which was previously used in WiFi, to LTE as well, enabling frequency occupation for a duration equivalent to that of surrounding WiFi. Additionally, by utilizing LTE transmission technology, they increased efficiency by up to two times compared to existing WiFi.
"We are pleased to have achieved a speed of 1.4Gbps for the first time in SK Telecom's LTE frequency band," said Andrew Cope, CEO of Nokia Korea. "SK Telecom's development of gigabit LTE will serve as a cornerstone for the evolution of 5G and lead the industry into a new era of communication."
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