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5G milestone for vehicle comms

Some of the most advanced 5G-V2X services include vehicle platooning and advanced and remote driving

Proof-of-concept test took place at Huawei and Telefónica's joint innovation lab
Proof-of-concept test took place at Huawei and Telefónica's joint innovation lab

Telefónica and Huawei have achieved a new milestone with the world’s first proof-of-concept (PoC) testbed for 5G-based vehicle communication networks (known as 5G-V2X) in their 5G joint innovation lab at Madrid.


5G-V2X is widely recognised as the first and most important vertical industry which will be enabled by 5G innovations. The test for 5G-V2X technology is based on the latest 3GPP New Radio (NR) Standard specification available since December 2017.


Some of the most advanced 5G-V2X services include vehicles platooning, extended sensors, advanced driving and remote driving, among others. Enabling the capability for self-driving will require further enhancements of the 5G NR system, in conjunction with a new NR Sidelink to allow vehicle-to-vehicle communications.


Due to the stringent requirements imposed by the high reliability and fast reaction times that characterise autonomous driving, the so-called ultra-reliable and low-latency communication (URLLC) mode for 5G NR offers the flexible design to support services with low latency and high reliability requirements.


In this PoC test, it was demonstrated that URLLC can effectively support V2X with higher system capacity and better coverage. The exercise achieved 99.999 per cent reliability with a low latency of 1ms required for autonomous driving in a typical macro cellular outdoor environment, such as dense urban, suburban and rural areas.


The PoC test will lay the foundations for large-scale field trials with the upcoming commercial deployments of 5G wireless networks worldwide.


In the 5G-V2X PoC, a novel self-contained frame structure for radio transmission was used, both from the base station to the vehicle and from the vehicle to another vehicle. This allows much faster transmission feedback, enabling very low-latency communications.


The great flexibility of the NR system framework allows the support of some advanced features, like Polar coding for small V2X packet error correction, an optimised HARQ (hybrid automatic repeat request) procedure for increased transmission reliability, or an ‘inactive state’ for instantly sending short packets to control the car manoeuvre.


“This PoC between Telefónica and Huawei is another step towards 5G commercialisation and a fully connected society,” said Enrique Blanco, Telefónica Global CTIO. “We will strengthen our collaboration by verifying 5G key technologies. Multiple novel use cases will be developed and provided to our customers.”


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