Towards Robust & Secure Blockchain-based Communications in ITS

In Intelligent Transportation Systems (ITS), the limited perception range of individual connected autonomous vehicles (CAVs) necessitates the collaborative utilization of information detected by nearby vehicles and roadside units (RSUs) to achieve accurate environmental perception and awareness, which relies on reliable data transmission among involved entities. Blockchain technology has been widely recognized for its effectiveness in ensuring secure and trustworthy data exchanges, with its importance rapidly increasing across various industries. However, traditional blockchain approaches have not fully addressed the dynamic mobility of CAVs or the efficient coordination among multiple RSUs within ITS scenarios. To address these challenges, this paper proposes an Integrated Membership Management Unit (IMMU) system utilizing blockchain technology to facilitate secure vehicle-to-infrastructure (V2I) communication among multiple CAVs and RSUs. This approach enables RSUs to cooperate effectively and uses reinforcement learning to achieve optimal load balancing. The performance and effectiveness of our proposed approach have been thoroughly evaluated through an end-to-end simulation.