I. Introduction
With the rapid development of the Internet, the number of users and the volume of business have shown explosive growth. However, due to the limitations of ground networks, satellite networks are needed to make up for their short-comings and achieve global and convenient communication [1]. In addition, the traditional satellite network architecture is vertically integrated and relatively closed, resulting in high propagation loss, high time delay, and frequent topology changes. Many technical problems have emerged in the practical application of satellite networks, such as difficulties in updating and upgrading equipment, inability to provide finer-grained services services, poor interoperability between devices, and difficulty in integrating with terrestrial networks. This has brought great challenges to the traditional information transmission theory and technology.