Modeling and Simulation of Time-Division Multiplexing Navigation Satellite Network based on OPNET

Due to the constraints of satellite platform and inter-satellite links, navigation satellite network has a characteristic of time-division multiplexing. Since the information exchange in time division-multiplexing navigation satellite network is very complex, it is generally necessary to use network simulation software to evaluate the design of navigation satellite network protocol. In this paper, the time-division multiplexing navigation satellite network is modeled based on the OPNET network simulation software. The satellite network is modeled from three levels: network domain, node domain and process domain. Also, the process models of link layer, network layer and transport layer are designed and described, respectively. Finally, the simulation results of network throughput with regard to different sliding window sizes and packet drop rates are given. It can be seen from the simulation results that the proposed simulation model of time-division multiplexing navigation satellite network based on OPNET is sufficient to evaluation the network performance.

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