Highly automated vehicles and connected driving are foreseen to be the next big steps toward improved traffic safety, efficiency and comfort. New mobility services are required to meet the increased demand from further urbanization and growing megacities. In a connected world, communication between road users, traffic infrastructure and data centers plays a key role to enable intelligent systems which cooperate and think ahead.
Several different communication technologies and architectures are currently investigated in research projects and field trials. Local information exchange based on IEEE 802.11p (US) or ETSI ITS-G5 (Europe) is paving the way towards market deployment within the next years, thanks to a wide set of common standards for networking and message contents. This provides low latency for communication ranges up to a few kilometers without the need for existing infrastructure. On the other hand, cellular services such as 3GPP Long Term Evolution (LTE) gain increased attention due to their growing network coverage, cheap device availability and continuous connectivity to cloud and backend services.