One of the most important issues, around the world, which manufacturers pay special attention to is to promote their activities in order to be able to give high quality products or services. Perhaps the first advice to achieve this goal is simulation idea. Therefore, simulation software packages with different properties have been made available. One of the most applicable simulators is NS-2 which suffers from internal complexity. On the other hand, Domain Specific Modeling Languages can make an abstraction level by which we can overcome the complexity of NS-2, increase the production speed, and promote efficiency. So, in this paper, we introduce a Domain Specific Metamodel for NS-2.This new meta¬model paves the ways for introducing abstract syntax and modeling language syntax. In addition, created syntax in Domain Specific Modeling Language is supported by a graphical modeling tool.