Trajectory ⁃ Based Data Forwarding Schemes for Vehicular Networks

This paper explains trajectory⁃based data forwarding schemes for multihop data delivery in vehicular networks where the trajectory is the GPS navigation path for driving in a road network. Nowadays, GPS⁃based navigation is popular with drivers either for efficient driv⁃ ing in unfamiliar road networks or for a better route, even in familiar road networks with heavy traffic. In this paper, we describe how to take advantage of vehicle trajectories in order to design data⁃forwarding schemes for information exchange in vehicular networks. The design of data⁃forwarding schemes takes into account not only the macro⁃scoped mobility of vehicular traffic statistics in road net⁃ works, but also the micro⁃scoped mobility of individual vehicle trajectories. This paper addresses the importance of vehicle trajectory in the design of multihop vehicle⁃to⁃infrastructure, infrastructure⁃to⁃vehicle, and vehicle⁃to⁃vehicle data forwarding schemes. First, we explain the modeling of packet delivery delay and vehicle travel delay in both a road segment and an end⁃to⁃end path in a road net⁃ work. Second, we describe a state⁃of⁃the⁃art data forwarding scheme using vehicular traffic statistics for the estimation of the end⁃to⁃ end delivery delay as a forwarding metric. Last, we describe two data forwarding schemes based on both vehicle trajectory and vehicu⁃ lar traffic statistics in a privacy⁃preserving manner. VANET; DSRC; vehicular networks; data forwarding; vehicle trajectory