Abstract: For the high-risk, high-cost to test equipments in real network and the poor accuracy of software simulation, network emulation method was introduced; the integration between real application and simulation system is the key technology. According to the mapping principle between real device and virtual network, a network emulation model framework was proposed; the OMNeT++ simulator on the source code lever was designed; the network emulation method based on shared library integration was proposed; the problems of thread error, time distortion and symbolic space in the process of integration were discussed, and corresponding solutions were given; the correctness of the method with an example of HTTP simulation model was verified. The results show that the method combined virtual network and the real application effectively, and has good real-time simulation performance. Potential applications were given in five areas.

Key words: network emulation, shared library integration, interface design, simulation model, real-time