STCC-Sim: A Satellite-Terrestrial Collaborative Computing Modeling and Simulating Toolkit for Resource Provisioning

The Satellite-Terrestrial Integrated Network (STIN) technology based on low-earth orbit (LEO) satellites provides a seamless network with low latency and high reliability to global users. The Space-Terrestrial Collaborative Computing (STCC) paradigm based on STIN has become a promising solution for ubiquitous computing. Due to the mobility of satellites and the vulnerability of inter-satellite and satellite-terrestrial network connections, the research on resource scheduling strategy, configuration, and deployment of STCC services is more complex than that of ground cloud services. The lack of simulators further restricts the development of STCC research. In order to solve this problem, we propose an STCC simulation tool for the satellite-terrestrial hybrid cloud in this paper. The tool can simulate the hybrid network models and support the simulation of the flow computing model. By evaluating the performance of the task offloading policy, we demonstrate the effectiveness of the simulation tool.