Toward the Integration of ADAS Capabilities inV2X Communications for Cooperative Driving

Future connected and automated vehicles (CAVs) will rely not only on their own sensors, but also on surround vehicles sensors, continuously exchanging information on the perceived environment and drivers' intentions. In addition, the amount of information coming from both the environment through the communication systems and the onboard advanced driver assistance systems (ADAS) is incredibly increasing and must be managed and fused. This is posing new challenges to be faced by the underlying communication technologies, since they will have to sustain higher throughput often with lower latency in a highly dynamic environment. In this paper we discuss the main characteristics of the actual wireless access technologies and the efforts under discussions at international level to satisfy the incoming new requirements and allow safe and efficient applications. Specifically, we start discussing IEEE 802.11p and Cellular-V2X (C-V2X) technologies and the roadmap of their evolution, then we go inside the new requirements, especially in terms of capacity and latency, and we discuss solutions coming from complementary technologies, such as mmwaves and terahertz communications, also considering the use of reconfigurable meta surfaces.