Safety Message Propagation Using Vehicle-Infrastructure Cooperation in Urban Vehicular Networks
A soaring number of vehicles in modern cities bring in complicated urban transportation and severe safety risks. After a traffic accident occurs, how to quickly disseminate this alert to other vehicles is very important to avoid rear-end collision and traffic jam. Existing studies mainly use the vehicles travelling in the same direction as the collision vehicles to forward safety messages, which strictly limit the performance improvements. In this paper, we propose a safety message propagation scheme using vehicle-infrastructure cooperation in urban vehicular networks, named SMP. On straight roads, the opposite-lane front vehicles help to relay data when no further collision-lane back vehicles exist, while at intersections, the deployed roadside units create new safety messages with updated dissemination parameters and distribute them in the upstream lanes. The collaboration of vehicles in two directions and roadside units enhances the performances of safety-related applications. Besides, three checking policies are designed to avoid transmission failures and hence save network resources. Simulation experiments show that SMP achieves a high reception ratio and a short propagation delay.
KeywordsUrban vehicular networks Safety message Vehicle-infrastructure cooperation Roadside units Transmission checking
- 9.Keranen, A., Ott, J., Karkkainen, T.: The ONE simulator for DTN protocol evaluation. In: Proceedings of International Conference on Simulation Tools and Techniques (SIMUTools). ACM, Rome, 2–6 March 2009Google Scholar
- 10.Khan, F.A.: Safety-message routing in vehicular ad hoc networks. Technical report, Georgia Institute of Technology, Atlanta, USA (2013)Google Scholar
- 18.Tang, X., Pu, J., Cao, K., Zhang, Y., Xiong, Z.: Integrated extensible simulation platform for vehicular sensor networks in smart cities. Int. J. Distrib. Sens. Netw. 2012(4), 22–26 (2012)Google Scholar
- 21.Wang, X., et al.: Regular-hexagon-equilateral-triangle area grouping-based broadcast protocol for safety message in urban vehicular ad hoc networks. Int. J. Distrib. Sens. Netw. 13(1), 1550147716683829 (2017)Google Scholar