Abstract: The data interaction mechanisms between the inter-satellite link based on timedivision polling chain-built mode and the fixed satellite-earth link are incompatible, which is not conducive to the efficient joint data interaction of navigation constellation and ground. It was proposed to extend the inter-satellite link to the ground by the satellite-earth link of the same signal system to realize the unification of satellite-satellite-earth data transmission and processing mechanism and the integration of network resources control with a small amount of ground station resources and unified network planning, enabling the satellite-satellite-earth data of efficient and accurate interaction. Firstly, the design and deployment method of the ground station and the integrated resource scheduling scheme were defined. Secondly, it was pointed out that the core of the integrated network topology planning is the distribution of the satellite chain, and the optimal ranking method and the ranking priority strategy of the domestic satellite chain were given. Represented by the shortest path routing, a route planning method was defined to search the transmission path according to time forward. Lastly, the communication performance simulations demonstrated higher performance of forward access data capacity and transmission delay between navigation constellation and ground of the approach proposed, compared with the traditional satellite-earth fixed link. 

Key words: navigation constellation, inter-satellite link, time-division polling chain-built, integrated network, accurate data interaction