Analysis of the Difficulties of the Earth Integrated Information Network

Due to the progress of the satellite communication system, the demands of earth integrated information network become rapid development. In this paper, we researched on the developing history and trend of the space network, and enumerated some important characteristics and difference between the space and territorial networks. And then analyzed the difficulties of the space internet, and proposed some solutions. It hopes to provide a useful reference for the development of the earth integrated information network.