A Dynamic Congestion Control Scheme for safety applications in vehicular ad hoc networks

Abstract

In recent years, various types of applications have emerged from Vehicular Ad hoc Net- works (VANETs) for safety, infotainment, rescue and security purposes. Safety applications have their own strict communication requirements, and they require reliable and timely data communication within networks. Due to a variety of network applications, safety ap- plications have been negatively impacted by communication channel congestion issues. Channel congestion leads to packet loss, delay and unreliability issues, and has a serious impact on vehicular traffic, including road accidents, road jams, and wrong traffic deci- sions. In addressing these issues, this paper’s authors have proposed a Dynamic Conges- tion Control Scheme (DCCS) as a means of reliable and timely data delivery, in safety ap- plications. The proposed scheme is designed for communication channels, as a means of broadcasting safety messages, and to ensure the reliable and timely delivery of messages to all neighbours in a network. The DCCS scheme is designed for inter-vehicle communi- cation, without fixed infrastructure. Comprehensive simulation is conducted, in order to evaluate the performance of a proposed scheme, and to compare it with other state of the art schemes.