2017(7):12-16.
Abstract:
Traditional satellite networks develops in the way of “chimney冶. With the development of technology and diversification of applications, the problems of traditional satellite networks, such as unitary function, isolated from each other, and satellites operations rely on the ground systems, are becoming sharper and sharper. The traditional satellite networks cannot satisfy the urgent needs of military, economy, and people's living standard. The space-ground integrated network makes comprehensive use of novel information network technology and takes advantage of space-based, and ground-based networks, which can support national strategic actions and promote the transmission and sharing of multivariate information. The space-ground integrated network is mainly composed of space-based network and ground-based network, and contains aircrafts networks, sea-based networks, and ground mobile network. According to the development of ground network technology, the space-ground integrated network should have the trend of smartness, coordination, and identification, and the trend of transforming from “host-centric”to” information-centric”.Meanwhile, the development of the space-ground integrated network faces many challenges, such as networking protocol, security guarantee, interconnection and fusion, and on orbit verification.
