Cellular V2X: What can we expect on the road ahead?

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Headings…
Cellular V2X: What can we expect on the road ahead?
Cellular V2N use cases: C-ITS and ADAS
Architecture of cellular network-based solutions
General architecture
Technical challenges for C-ITS and ADAS message communication via cellular
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Abbreviation list

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For many years, cellular vehicle-to-network (V2N) communication has served many various automotive use cases (read more in our earlier LTE-V2X blog post).
Cellular V2N connectivity enables a wide range of road transport and automotive services, including regulated Cooperative Intelligent Transport Systems (C-ITS), Advanced Driver Assistance Systems (ADAS), connected road infrastructure services, vehicle-centric OEM telematics and aftermarket services, fleet management and logistics services, and convenience and infotainment services.
Cellular V2X connectivity can further improve ADAS by providing the driver with information about upcoming signal and traffic situations using either standardized protocols or, in many cases, proprietary protocols to vehicles from car original equipment manufacturers (OEMs) e.g. Audi’s traffic light information via V2N communication.
Typically, Day-1 C-ITS services require communication latency below 100 milliseconds for end-to-end message delivery between the vehicle, network and back to other vehicles.
Compared to short-range direct V2V and V2I communication, cellular V2N communication (often referred to as V2N2V and V2N2I) – based on cellular mobile networks – provides a faster time-to-market solution for C-ITS and initial supports to ADAS services.
Delivering C-ITS and ADAS services using the existing cellular modems of modern connected cars offer both financial and time-to-market advantages, especially when compared to short-range V2V/V2I solutions that will take many years to reach the required penetration rate of on-board and roadside units.
The V2X-AC can be at vehicles, personal devices, or road-side units which are all provisioned with cellular connectivity.
V2X-AS may be implemented at the backend system of different stakeholders, e.g. automotive Original Equipment Manufacturers (OEMs), third-party ITS service providers, or Road Traffic Authorities (RTAs)

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