Towards the Age of Intelligent Vehicular Networks for Connected and Autonomous Vehicles in 6G

Twenty-two years after the advent of firstgeneration vehicular network, i.e., dedicated short-range communications (DSRC) standard/IEEE 802.11p, technology market has become very competitive with a new player, Cellular Vehicle-to-Everything (C-V2X). Currently, C-V2X likely dominates race because big advantages comprehensive coverage and high throughput/reliability. Meanwhile, DSRC-based technologies are struggling to survive rebound many hopes betting on success secondgeneration standard, IEEE P802.11bd. While standards battle attract automotive makers dominate commercial landing, research community started thinking about shape next-generation networks. This article details state-of-the-art progress networks, particularly cellular V2X-related in specific use cases, compared features current generation. Through typical examples, we also highlight why 5G is inadequate provide best connectivity for applications then 6G can fill up vacancy.