SK Telecom (NYSE: SKM) has tested LTE-Advanced (LTE-A) five-band carrier aggregation (CA) on its commercial network, the company said.
Since June 1, 2016, SK Telecom has been providing 500Mbps LTE-A Pro service by applying 256 QAM technology to its tri-band LTE-A CA network. Also, the company has acquired additional spectrum in the 2.6GHz band in May 2017, securing the basis for LTE-A five-band CA.
In addition, SK Telecom has successfully demonstrated the application of MIMO to its tri-band CA network, thereby securing the capability to provide 900Mbps data speeds.
With the application of 4X4 MIMO – a technology that doubles the transmission speed – to a 20MHz bandwidth of a frequency band, users will be able to download data at maximum rate of 400Mbps per frequency band.
Established in 1984, SK Telecom is the largest mobile operator in Korea by both revenue and number of subscribers. As of December 2016, the company holds around 50 percent of the market, with 29.60 million mobile subscribers including 21.1 million LTE subscribers.