This paper presents the idea of modeling transparent network simulations to realize the communication system by using interactive network simulation technology. An interactive network simulation can be built based on High Level Architecture (HLA). With the "software bus" Run time infrastructure (RTI), users could operate the discrete-event- driven simulators while simulation is running. In these cases, users may not even distinguish themselves in a simulation environment. With HLA, we could conquer the shortcoming that the traditional discrete-event- driven simulation software could only simulate network models with fixed or simple random parameters, and therefore maximize the similarity between the simulation and the real networks.