Mutual Connection in 5G Based Space Information Networks: Opportunities and Challenges

In recent years, satellite communication has becoming popular and develop very fast around the world. Recently, the fifth-generation mobile communication (5G) is about to enter the commercial use. As key characteristic of the 5G communication system, the integration of satellite communication and ground 5G has become a new hotspot. In this paper, we propose the summary of 5G in space based view, first of all, we introduce the status of 5G communication system, and its convergence to space wireless communication system. Then we analyze the development trends of satellite 5G systems, and then gives the initial idea of satellite 5G fusion, including architecture design, air interface design, based on SDN/NFV network virtualization deployment and protocol optimization, and discussed the possible problems of fusion; finally, the key technologies of satellite 5G fusion are sorted with opportunities and challenges.