Analysis and suggestions on inter-satellite laser communication of satellite Internet

Satellite communication and terrestrial mobile communication have strong complemented co-benefits.Satellite Internet is the hot spot supporting current industrial development and an important part of the future 6G network. Global coverage requires interstellar networking, but inter-satellite communication bandwidth requirements and the instability brought by the free space channel pose new challenges to the space bearer network. Inter-satellite communication technologies and link interface technologies were compared and analyzed. An optical transport network（OTN） carrier network solution based on inter-satellite laser was proposed, which could fully leverage the advantages of the maturities and the economies of the scaled ground optical communication. It constructs a satellite-terrestrial integrated network with strong cost-efectivity, compatibility, and scalability. Finally, the technological directions and evolutions of the inter-satellite laser communication were discussed, and suggestions for industrial d