Research on TT&C Key Technologies of HTS for Huge Number LEO Satellites

The development of retrievable vehicles and mass manufacture of satellites has expedited the speed of human space exploration, and the number of satellites of all sorts has surged. SpaceX, the largest firm, started its Starlink program with an estimated 42,000 satellites in 2015. CASC's “Hong Yan” satellite constellation communication system and ASIC's “Hong Yun” project both launched their first satellites into orbit in 2018. Furthermore, China's broadband constellation proposal, which was presented to the ITU in 2020, includes 12,992 satellites. The disparity between China's TT&C methods and future need for huge constellation is becoming increasingly apparent. Based on a study of the problems and demands of vast low-orbiting satellites, this article proposes a new approach of leveraging high-throughput satellites to assist the TT&C of many satellites. Because of its multi-point beam, frequency multiplexing, high beam gain, and other advantages, high-throughput satellites offer inherent advantages for huge satellites TT&C. However, because of the high speed of low-orbiting satellites, ensuring continuous and uninterrupted data during the TT&C process is a critical difficulty that must be overcome. The design of beam switching time, implementation process, and beam resource scheduling technique shown in this work may effectively address the problem of high-throughput satellite support for low-orbit satellite TT&C, as well as innovate the method of TT&C of high-volume low-orbit satellite.