High Definition Map Distribution in Named Data Networking Based VANETs

High Definition (HD) map is a key technology for autonomous driving, and how to quickly distribute HD map is an open issue. Named Data Networking (NDN) is an information-centric architecture and naturally supporting consumer mobility. NDN shows strong potential in HD map distribution for au-tonomous driving. However, there are still some problems in the autonomous driving area, such as the use of Vehicle-to-everything (V2X) cooperative communication for map data delivery, and V2X interface handover. In this paper, we propose an NDN HD map distribution scheme based on Vehicle Ad-hoc Network (VANET), which improves the map distribution efficiency in the case of limited bandwidth. The scheme is divided into three parts, a fast content delivery mechanism using multiple data sources, a probabilistic handover strategy for V2X interface handover, and an Interest sending rate control scheme for different interfaces. The evaluations show that the proposed scheme can improve by about 51% of average throughput and reduce up to 50% packet loss.