A Scalabale Application and System level-Based Communication Scheme for V2V Communications

To deal with the congestion problem in a broadcast environment like V2V communication, we believe that receiving nodes should take a role in guiding transmitting nodes to set their transmission parameters e.g., Tx rate and power. This is important because only receiving nodes can evaluate whether or not safety applications requirements have been fulfilled. While most congestion control protocols rely on network-level metrics to optimize their transmission parameters, our proposed method uses a combination of application and network level performance metrics to assign transmission parameters. In the proposed method, nodes calculate the max tolerable time between periodic messages as well as the channel load, and share it with others. The shared data is used to guide neighboring nodes in regulating their messaging rate and Tx power. Receiving nodes adapt their rate or/and power based on their locations w.r.t to the node with degraded safety applications performance. The evaluation shows that our method maintains low inter packet reception time.