Aerospace Technic and Technology

There are considered issues of building a Low-Earth-Orbit Satellite System designed to provide the Internet of Things services and adapted to the features of the services and systems of the Internet of Things. The considered system provides the creation of the necessary telecommunication infrastructure based on the Low-Earth-Orbit Broadband Access Satellite System and places Computational Facilities into the Low-Earth-Orbit for to ensure the processing of Internet of Things devices and systems information, and perform computations. The architecture of a “Distributed Satellite” was chosen to construct the telecommunications part of the Internets of Things Satellite System. The chosen architecture allows, on the one hand, to ensure the full functionality of complex telecommunication systems, and on the other hand, to use spacecraft of the form factor nano-satellite / cub-sat. The using of the cube-sat spacecraft for development of the satellite-based system allows to significantly reduce the cost of development of the system and the time of the system deploying. A promising direction in the development of the Internet of Things systems is the implementation of the concept of “Fog Computing” for processing Internet of Things information. To implement “Fog Computing”, it was proposed to include into the composition of each “Distributed Satellite” a separate Satellite-Computer and to build an Orbital Distributed Network based on Satellite-Computers. The issues of the inter-satellite connectivity are considered taking into account ensuring the connection between Satellites-Computers in the framework of the Orbital Distributed Computer Network using inter-satellite links between Distributed Satellites, the characteristics of the orbital construction of the Satellite System Constellation. It was proposed to create and deploy the Distributed Localized Database based on the Orbital Distributed Computer Network, for to ensure the continuous provision of Internet of Things services, taking into account the movement of spacecraft in the orbital plane and the rotation of the Earth. It was shown the direction of transmission of the operational part of a Localized Distributed Database. Proposals are made on the distribution of the excess computational load arising in certain regions of the satellite telecommunications system's service area, involving the resource of neighboring satellite computers in its orbital plane and neighboring orbital planes. An algorithm is proposed for moving the excess computational load to the polar and oceanic regions.

LEO Satellite Communication System; Internet of Things; Distributed Computer Network

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