  -Performance of Vehicular Adhoc Networks (VANETs) in high node density
situation has long been a major field of studies. Particular attention has been
paid to the frequent exchange of Cooperative Awareness Messages (CAMs) on which
many road safety applications rely. In the present paper, se focus on the
European Telecommunications Standard Institute (ETSI) Decentralized Congestion
Control (DCC) mechanism, particularly on the evaluation of its facility layers
component when applied in the context of dense networks. For this purpose, a
set of simulations has been conducted over several scenarios, considering rural
highway and urban mobility in order to investigate unfairness and oscillation
issues, and analyze the triggering factors. The experimental results show that
the latest technical specification of the ETSI DCC presents a significant
enhancement in terms of fairness. In contrast, the stability criterion leaves
room for improvement as channel load measurement presents (i) considerable
fluctuations when only the facility layer control is applied and (i.i) severe
state oscillation when different DCC control methods are combined.
