Research On Inter-satellite Link Assignment And Routing Algorithm For Navigation Constellation Network

Inter-satellite link(ISL)technology is currently the emphatic focus of' world's major satellite navigation systems' research and construction.To establish inter-satellite links with high-frequency,spot-beam phased array antenna has become a tendency in ISL development of navigation constellation network.Focused on the circumstance of navigation constellation network ISL with time-division system and directional antenna,this paper first analyzes the theoretical background and topological chiaracteristics of this scenario..The important content of ISL technology-ISIL assignment algorithm and rcouting algorithm arc studied.A new traffic-based ISL assig,nment algorithm is proposed.It aims to reduce congestion and improve the overall data transmission performance according to traffic distribution.on the basis of meeting the navigation system's communication and ranging requiremenls.In order to ensure data's real-time transmission performance,this paper proposes to apply the latest version of CGR(contacl graph routing)algorithm to this scenario,and gives modilications to make it more concise ancd more applicable.Finally,to further measure the performance of the proposed ISL assignment and routingalgorithms by obtaining and analyzing the transmission efficiency of the whole network data.this paper builds a navigation constellation network information flow simultion system in OPNET.Different scenarios are set up to offer tests.According to the simulation and data analytical results,good performance of the proposed ISL assignment and adapted routing alggorithmsms arc proved,which provides certain reference significance for the design of ISL schemes of navigation constellation network.