“…To guarantee a reliable and timely delivery of various delay-sensitive safety-critical messages, such as BSMs, the vehicular networks need to have carefully designed congestion control strategies. Traditionally, there are five major categories of congestion control methods, namely rate-based, powerbased, carrier-sense multiple access/collision avoidance based, prioritizing and scheduling-based, and hybrid strategies [70], which adjust communications parameters, such as transmission power, transmission rates, and contention window sizes, etc., to meet the congestion control purposes.…”