Research On Tactical Data Link For Space Information Network

Space information network to space platform as the carrier,through the multi-system integration composed of real-time acquisition,transmission and processing information network system.Space information network is an important strategic direction of China's 13 th Five-Year Plan for the innovation of science and technology,is also the current focus areas of national development.Tactical data link as an important component of space information network.However,due to the lack of uniform norms and technology,the environment of the space information network is complex,and the interconnectivity of the different tactical data link is seriously constrained,affecting the overall network performance,to form a "chimney" phenomenon.Therefore,it is of great value to carry out the key research such as the efficient carrying and the information integration of the tactical data link in the space information network.This paper focuses on the research in the tactical data link for the space information network,The main work includes:First of all,we make in-depth comparative analysis for the research status of tactical data link of space information network.Secondly,based on tactical data link we propose the packet carrier approach TCA.A reliable control mechanism based on dynamic Bayesian network is designed for high error rate and long delay in the space information network environment;Simultaneously,we make in-depth analysis of packet field characteristics,develop the control mechanism based on context consistency.The simulation results show that with different load ratios and different environment complexity the TCA reliability is excellent,it has 93% packet carrier ratio,which are 3.33 times higher than those of the primitive packets.Thirdly,a tactical data link information forwarding mechanism(SIT)based on software defined network is proposed.According to the characteristics of tactical data link information demand,the concept of software defined network is introduced,and the label tunnel control mechanism based on flow state is designed;based on the packet / label forwarding method is developed.Simulation results show that the SIT can flexibly achieve efficient information traffic delivery.At last,the paper summarizes the whole work.and looks forward to the next work.