Simulating And Modeling Of Earth-mars Relay Communication Backbone Network Based On Lagrange Point

Mars exploration is one of the important activities of human deep spaceexploration within the next few years,which is inseparable from the support of deepspace communications systems, and the deep space backbone network has becomean integral part of the communication system. Deep space backbone network isdefined by a set of stable, high availability, high capacity relay nodes. It includesthe communication node of distance between the data link (direct link or multi-hoplink), and stores and forwards navigation and positioning information, remotetelemetry information and scientific data between the detector, space stations,spacecraft, planets relay satellites. Deep space backbone network link hasdiscontinuities, asymmetry, long delay and other characteristics resulting in thecomplexity of research on deep space network.For the high cost of deep spaceexploration communications,it’s necessary to build terrestrial communicationssimulation platform for a full demonstration before practical application for thedevelopment of new technologies.First, in light of this, the paper has conducted special studies on thedevelopment of deep space communications and the structure of deep spacecommunications backbone network, and analyzed the reasonableness of the choiceof Lagrange as a deep space backbone network node. Also the paper has studied theSTK Lagrangian point relay satellite orbit prediction model and the STK orbitalparameters is given.Second, the paper also has designed four schemes of earth-marscommunications backbone network:Dual hop relay, Multi-hop relay,Two dual-hoprelay, Two multi-hop relay, and analyzed the advantages and disadvantages ofvarious schemes based on the studies of deep space backbone network.Based on the above, the above scenarios has been set up by using STKsoftware, and the simulation shows access time and link distance of earth-marsbackbone network which chose the Lagrangian points of Sun-Earth system andSun-Mars system as nodes.Finally, according to the simulation data, mathematical model is proposed forthe dynamic selection nodes for Sun-Earth interplanetary backbone network fromthe consideration of improving the network access time and choosing shorter linkdistance.