SK Telecom claims to have brought down latency between the handset and base station to 2 milliseconds (ms) over its LTE network. As per International Telecommunication Union (ITU), 5G should deliver a peak data rate of up to 20Gbos and latency of less than 1 millisecond. With this demonstration, SK Telecom has moved one step closer to realizing the vision of 5G.
This low latency is critical to executing real-time use cases such as autonomous driving and telemedicine. SK Telecom has been taking a lead in 5G technology, which is yet to be standardized. The service provider has been in the news recently for the number of initiatives to drive 5G deployment. (See: SK Telecom Demonstrates 5G in 3.5Ghz; Collaborates with Samsung and Nokia and Korea’s SK Telecom Touts New 5G Repeater.)
The latency between the handset and base station in the existing LTE environment is around 25ms. “The newly developed 2ms latency technology is expected to facilitate the development of diverse real-time services – e.g. autonomous driving, AR and VR services – which will become widespread in the 5G era,” says the press release.
SK Telecom, along with Nokia, brought down the latency between LTE handset and base station from 25ms to 2ms by applying Uplink Pre-Scheduling, a technology that enables the handset to immediately transmit data to the base station, and short Transmission Time Interval (TTI), a technology that reduces data transmission time between base station and handset to about 1/7.
The companies will continue to work together to reflect the short TTI technology to the 3GPP global standards.
“Low latency technology is essential in realizing 5G services such as autonomous driving, artificial intelligence and virtual reality services,” said Park Jin-hyo, Senior Vice President and Head of Network Technology R&D Center of SK Telecom. “We will continue to improve our low latency technologies to achieve 5G evolution, while applying the latest technologies to our LTE networks to further enhance customer experience.”