World’s first “cooperative driving”
Multiple autonomous vehicles shared information via 5G technology while self-driving. This is the first time that multiple number of 5G self-driving cars ran in coordination while monitoring each other’s route and road safety.
On February 5th, SK Telecom and Korean Transportation Safety Authority (TS) ran two 5G self-driving cars successfully through “cooperative driving,” where traffic information was effectively shared between the two vehicles, in K-City, the pilot city for self-driving located in Hwaseong. So far, autonomous driving technology has remained on the level of avoiding obstacles based on cameras and sensors.
For the demonstration, two 5G network connected autonomous cars that SK Telecom and TS co-developed were used. While running the 2km self-driving track, these cars communicated through 5G technology such as V2X (Vehicle to Everything), 3D HD map, deep-learning-based driving technology.
Ultra-low-latency of less than 1ms of response time
In partnership with TS and Samsung Electronics, SK Telecom deployed 5G network using 28GHz ultra-high frequency broadband in every corner of K-City that covers an area of 360,000㎡ last December.
During the trial driving, the cars perceived a school zone area and automatically slowed down. When a life-size model of a child appeared on the road, a CCTV set up to a streetlight immediately sent a message using 5G technology to the nearby self-driving vehicle. Upon receiving the message, the vehicle instantly stopped and started driving only after it was confirmed that the model was not on the road. This showed that SK Telecom’s 5G technology’s ultra-low-latency of less than 1ms of response time can help prevent traffic accidents.
The vehicles received information on highway constructions using 5G technology from the control center and reset the driving route. They also raised speed to 60km/h when they entered the highway. At the time of multiple vehicle collisions, the preceding vehicle sent an instant report of the accident via 5G network to the car behind and to the control center. This allowed the car behind to drop its speed, change its lane and safely drive through the accident scene.
When two cars were simultaneously at the crossroads with no traffic sign, they communication was made via 5G network both between the vehicles and with the control center to decide which one to first pass through the congested area.
The self-driving car communicated more than 100 times a second using 5G network with the control center and another vehicle to successfully minimize the risk of accidents on the road.
HD map with detailed driving lanes·traffic infrastructure, supports safe driving
During the demonstration, an HD map that precisely depicted nearby traffic signs and lights, and information on K-City’s driving lanes within some-cm accuracy was adopted. When the self-driving cars were on the move, various driving information, including nearby vehicle’s real-time location, traffic light signal and traffic information, highway construction, multiple collision incident, was reflected on the HD map on a real-time basis. The autonomous car could make decisions while driving based on various information it had received from the HD map.
SK Telecom enabled the level of technology to drastically reduce accidents on self-driving car using 5G V2X and 3D HD map even in bad weather conditions and at night when camera and sensor technologies might not function properly. SK Telecom also showcased our top-notch 5G technologies, including self-driving electric bus and 5G HD map-producing vehicle on the site.
Through this demonstration in K-city, a world where autonomous vehicles communicate with each other through 5G and drive safely, has become even closer to reality. SK Telecom will keep evolving technologies for autonomous vehicles in the 5G world.