Nt1310 Unit 2 Module Analysis

OMNeT++ was designed to support network simulation on a large scale. It consists of modules that communicate with message passing. The active modules are the simple modules which are written in C++ using the simulation class library. Simple modules can be grouped into compound modules. Messages are sent via connections that span the modules or directly to their destination modules. The simple and compound modules are instances of module types. The user creates a system module as a network module which is a special compound module without gates to the external world. These modules can be reused with the help of model frameworks like INET framework and Mobility framework.

The modules communicate with messages which contains some attributes
Typical NED descriptions include simple module declarations, compound module declarations and network definitions. Simple module declarations describe the interface of the module the gates and parameters. Compound module definitions consist of the declaration of the modules external interfaces like gates and parameters and definition of submodules and their interconnection. Network definitions are self-contained simulation models. Some of the major features of NED language in OMNeT++ include
• Inheritance
• Interfaces
• Packages
• Inner types
• Metadata annotations

OMNeT++ consists of a graphical editor which helps to edit network topology files graphically or in NED source view.

2.2.2.1.2 Model and Experiments

In OMNeT++ model behavior is captured in C++ files as code while model topology is defined by the NED files. This approach allows to keep the different aspects of simulation in different places thus allowing to have cleaner model and better tooling support. The different inputs for the simulation are stored in the INI files. INI files provide a great way to specify how the parameters change during the