Wireless connectivity in road C-ITS
Andrej Štern, University of Ljubljana, Faculty of Electrical Engineering, SLO

Cooperative intelligent transport services (C-ITS) are based on technologies and applications that allow users to exchange data with each other and the surrounding infrastructure through wireless communications. While these services span from basic location awareness in Day 1 to sophisticated sharing of intentions and supporting negotiation in Day 4, communication technologies must cope with requirements arising from the criticality of road C-ITS use cases. Communication latencies, ranges, data rates, capacities and efficiency differ in two major communication groups – microwave and cellular.
This paper presents an overview of wireless technologies, based on 802.11p and 802.11bd under the European microwave family ETSI ITS-G5, and cellular LTE-V2X and 5G NR-V2X from 3GPP, their capabilities and compliance to C-ITS services requirements towards cooperative safe and efficient automated road traffic.

Keywords
C-ITS services, road, use cases, C-Roads, communication, 802.11p, 802.11bd, ITS-G5, LTE-V2X, 5G NR-V2X