Design of a Hybrid Multi-layer Satellite Backbone Network Architecture br

The space-based backbone transmission network will develop in the direction of broadband and relayintegration, providing services such as global backbone transmission, broadband high-speed access andheterogeneous network interconnection for land, sea, air and space users. According to the service requirementsof different users, a multi-layer satellite backbone network architecture for medium and high orbit(3GEO+3IGSO/24MEO) is proposed to use the "Satellite Backbone Network/All-Domain Users Access" model.Through the calculation and analysis of the spatial coverage of the architecture, it is concluded that the multi-layer satellite network can achieve 100% coverage of the whole airspace from the earth's surface to theGeostationary Earth Orbit altitude (about 36000 km), and provide multiple access capabilities for All-Domainusers. Furthermore, through the analysis and comparison of the key network performance indicators such aspath numbers, minimum hops and delay, the necessity of the existence of inter satellite links between mediumorbit satellites and high orbit satellites in the architecture is proved. The analysis results show that thearchitecture can satisfy the broadband access and backbone transmission needs of all kinds of users in the wholeairspace.