Development Trend and Architecture Prospect of Future Low-Earth-Orbit Information Networks br

In recent years, with the upsurging development of launching, satellite, telecommunication, andnetworks technologies, the form of space-based networks is undergoing qualitative changes. Low-Earth-Orbit(LEO) constellation network has become a new option for many application scenarios. With the developmenttrend towards a space-based information infrastructure, the LEO constellation is required to possess features ofglobal coverage, constellation-terrestrial integration, diversified carrying, continuous evolution, security, andcontrollability, which put forward higher requirements for the network architecture of LEO constellation in thefuture. Therefore, in this paper, the development status of related fields of LEO constellation networks issummarized, and the tendencies of LEO constellation network development are analyzed. On this basis, an "all-in-cloud" network architecture based on Software-Defined Network (SDN) and Network Function Virtualization(NFV) is proposed, making the network architecture programmable, decoupled, and decentralized. Moreover,the network operation management is supported by intention-driven approaches, so as to realize the capabilitiesof flexible carrying, continuous evolution, and automatic management of the network. Finally, the technicaldirection that needs to be focused on is looked forward to in this paper.