Access strategy of mega-constellation network based on minimum routing cost
Aiming at the problems of complex inter-satellite routing and unbalanced load of gateway satellites in low-earth-orbit mega-constellation networks,the inter-satellite routing cost in the satellite-ground access strategy is considered,and an access strategy based on the minimum routing cost is proposed.The strategy is divided into three stages:in the shortest hop estimation stage,the hops of inter-satellite routing from the user terminal to the gateway satellite are estimated according to the location of the user terminal and the gateway;in the gateway satellite allocation stage,a bipartite graph model is established based on the estimated hops,the gateway satellite and the type of access satellite is determined by using the weighted least cost matching algorithm;in the access satellite selection stage,the optimal access satellite is selected from certain types of visual satellites by using the weighting method of inter-satellite routing hops and satellite-ground communication elevation angle.The simulation results show that the proposed method can significantly reduce the hops of inter-satellite routing of the whole system,improve the load balancing of the gateway satellites and the access success rate of users.
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维普
