On the tracking accuracy of beaconing coexistent with event-driven traffic at the DSRC channel

Accurate vehicle tracking is a principal requirement of vehicle safety critical applications. In vehicle-to-vehicle communication, vehicle tracking is achieved by broadcasting beacon containing state information of the sending vehicle in dedicated short range communication (DSRC) channel. Frequent beacon broadcasting can enhance vehicle tracking accuracy, but also lead to channel congestion in high vehicle density. The state-of-the-art beaconing schemes adapt beacon rate to avoid channel congestion. In this paper, we analyze the impacts of event-driven traffic on the tracking accuracy of beaconing schemes. The simulation results show that tracking accuracy degrades with the increase of event-driven traffic load. Based on the results, we conclude that beacon rate should be carefully determined in order to maintain the tracking accuracy with the existence of event-driven traffic load.