Abstract
Internet of Things (IoT) is rapidly gaining ground in the scenario of modern wireless communications. The satellite system, which plays a significant role in the development of IoT, is expected to cooperate with the terrestrial components to provide a complementary service. In order to better study the combination of satellite and terrestrial IoT networks, building a simulation environment based on software defined network (SDN) and network function virtualization (NFV) technology to create a real and reliable large-scale test environment is of great significance. This paper provides an architecture of IoT network in a combined low earth orbit (LEO) satellite-terrestrial structure embracing SDN technologies. A semi-physical simulation platform utilizing SDN and NFV for satellite-based IoT Network is demonstrated. Last but not least, two use cases of this platform are discussed. Simulations of satellite routing algorithms and combined LEO-terrestrial mobile network prove the validity and authenticity of the platform.
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