C-V2X combines two different communication links:
> Direct link, used for Vehicle-to-vehicle (V2V) or vehicle-to-infrastructure (V2I) communication. This link operates in the unlicensed 5.9GHz band, using the PC5 interface.
> Network link, used for Vehicle-to-node (V2N) communication, operating in the licensed spectrum, using the Uu interface.
The two links are fundamentally different. Direct link is used for real-time, safety, short-range communication, while the network link serves Telematics and Infotainment. In the future, 5G might be used for teleoperated driving through the network, but that would require an additional dedicated communication device, on top of today’s Telematics Control Units (TCU)
