Vehicular Broadcast Messaging Reliability Enhancement Protocol for Emergency Vehicle Communications

This paper presents a new reliability enhancement to safety messaging system particularly useful for emergency vehicle (EV) communications. This enhancement makes meeting stringent quality of service (QoS) requirements particularly prevalent in safety applications of Dedicated Short Range Communications (DSRC). We show that emergency- Passive Cooperative Collision Warning (ePCCW) enhances EV performance in particular, and measurement of the effect on surrounding vehicles relative to the desired EVs is also shown. ePCCW protocol is an imperfect distributed protocol, and both analytic and simulation results agree and show a significant improvement in EV communication reliability. Substantial improvement in reliability or probability of success relative to a leading alternative is realized. Highway environment is simulated with mobility modeled using the well known Simulation of Urban MObility (SUMO), and the DSRC Physical layer (PHY) is simulated using an accurate Orthogonal Frequency Division Multiplexing (OFDM) PHY simulator, with varying channel conditions based on mobility model and highway environment. Additionally, the proposed system is shown to have a decreased average timeslots delay that is well within acceptable delay threshold, and provides the best reliability in its class.