Reducing Message Loss in DSRC Networks using Dynamic Distribution of Safety Messages over EDCA Access Categories

The use of vehicular networks for collision avoidance increased significantly in the last decade. In particular, governments are employing DSRC-based communication for this purpose. One of the main challenges for DSRC-based vehicular networks is congestion control. Many solutions are proposed in the literature to solve this problem. Recently, EDCA different access categories have been utilized to reduce network congestion by distributing messages over different access categories. This prioritizes messages over each other which reduces collisions in the network. Unfortunately, there is no current solution to dynamically find the best message distribution over the EDCA access categories. In this paper, we propose an easy and dynamic solution to control congestion by finding the best message distribution over EDCA access categories. Results demonstrate that the proposed dynamic solution reduces congestion effectively especially with larger networks.