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This is a software module for the network simulator ns-3 that implements the DCC (Decentralized Congestion Control) Access protocol specified by ETSI inTS 102 687 v1.2.1. DCC controls the data traffic injected by each vehicle to the radio channel for ITS-G5. It makes use of Prioritization, Queuing and Flow Control. This module has been tested with ns-3.26 and ns-3.20, but can be easily integrated in other versions of ns-3. We plan to integrate it into the iTETRIS simulation platform, which is being updated and evolved in theH2020 TransAID research project.

In order to comply with our sponsor guidelines, we would appreciate if any publication using this software references the following publication:

Miguel Sepulcre, Jorge Mira, Gokulnath Thandavarayan, Javier Gozalvez,"Is Packet Dropping a Suitable Congestion Control Mechanism for Vehicular Networks?", Proc. IEEE 91st Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, 25-28 May 2020.

What DCC parameters can be modified:

Algorithm: Reactive, Adaptive or NoDCCCBR target: only for Adaptive approachQueue lengthPacket life time

How to install:

1.- Simply copy the "dcc" folder into your "src" folder.2.- Configure and compile ns-3 following the normal procedure.

How to run the example script available in the "scratch" folder:

./waf --run "dcc-example --Algorithm=Reactive --simulationTime=20 --NumCars=200 --Speed=27"