Research on trust mechanism of C-V2X

C-V2X (Cellular Vehicle-to-Everything) has become a profound reform and innovative technology in automotive and communication industries. Through C-V2X communication, the nearby traffic participants can exchange real-time information, such as status, positioning, location, to achieve environmental perception, information exchange, and collaborative control capabilities. However, because of the rapid changes in traffic topology and high vehicle mobility, the improvement of safety and efficiency in the distributed C-V2X system is complex and dynamic. The information shared among the participants requires a systematic technical solution to solve the untrustworthy issues. In order to address the challenges, this paper focuses on the trust mechanism in the C-V2X system. It analyzes the latest progress of research on trust mechanism of C-V2X in academia and industries. A trustworthiness evaluation framework oriented to lifecycle management of trust models is proposed, including trust information management and analysis, trust models management, trust evaluation, and trust decision. Taking two typical C-V2X scenarios as examples, this paper illustrates the detailed trust assessment process with different modules in the system. Finally, the open and important research issues are proposed for the future trust mechanism of C-V2X.