Real-time Communication in Vehicular Ad Hoc Networks (VANETs)

4.2.4 Modularization and Aggregation Method
Even though the primary version of this simulation is designed only to
perform the TBMAC protocol, we should take modular aggregation concept
into consideration in the very beginning of the design phase.
As known to all, one of the most essential concepts of the computer networks
is network layering stack that allows developing various layer protocols of
networks in hierarchical levels [47].
In the future work, the simulation and implementation on physical layer, data
link and network layer must be developed. These models of different layers
have to coexist. Since in multi layer simulation scenarios, the parameters of
some models may influence the other hierarchical levels.
From integrated view of cross layer network simulation, for the evaluation of
routing algorithms MAC and network layers have to be simultaneously
simulated. For transport layer MAC layer has to be modelled. Those
cross-layer simulations happen to be difficult to operate, but they are
promising methods. [46]
4.3 Choices of Simulation Modes
4.3.1 Rationale of Simulation Study
Simulation is a technique of imitating the behaviour of some real-life system
by means of an analogous model to gain information and further facilitate
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