For several years, automobile manufacturers and government agencies have sought ways to increase road safety, manage traffic efficiently and, in the future, make it more comfortable. Next generation vehicle-to-everything (V2X) information and communications technology offers low latency vehicle-to-vehicle (V2V), vehicle-to-roadside infrastructure (V2I) and vehicle-to-pedestrian (V2P) communications, adding a new dimension to future driver assistance systems.
3GPP Release 14 cellular V2X (C-V2X) uses LTE technology as the physical communications interface. The standard has two modes. Vehicle-to-network (V2N) mode, where communications take place over the Uu interface and traditional cellular links enable cloud service integration for end-to-end solutions. This can be used for the distribution of local road and traffic information to vehicles. The second mode is direct or side link mode (V2V, V2I, V2P), where communications take place over the PC5 interface. Here, C-V2X does not necessarily require network infrastructure and can operate without an SIM and network assistance by using GNSS as the primary source for time synchronization. Verifying system functionality and performance with real world field testing can be time-consuming, costly and very challenging.