Adaptive Message Rate Control of Infrastructured DSRC Vehicle Networks for Coexisting Road Safety and Non-Safety Applications

Intelligent Transport System (ITS) has large potentials on road safety applications as well as non-safety applications. In this paper, the authors investigate the use of Dedicated Short-Range Communications (DSRC) for coexisting safety and non-safety applications over infrastructured vehicle networks. The main objective of this paper is to improve the scalability of communications for vehicles networks, ensure QoS for safety applications, and leave as much as possible bandwidth for non-safety applications. A two-level adaptive control scheme is proposed to find appropriate message rate and control channel interval for safety applications. Simulation results demonstrated that this adaptive method outperforms the fixed control method under varying number of vehicles.