基于最小路由代价的巨型星座网络接入策略  

Access strategy of mega-constellation network based on minimum routing cost

作　　者：张驰 陈全[2] 唐祖平 魏蛟龙 ZHANG Chi;CHEN Quan;TANG Zuping;WEI Jiaolong(School of Electronic Information and Communication,Huazhong University of Science and Technology,Wuhan 430074,China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]华中科技大学电子信息与通信学院,湖北武汉430074 [2]国防科技大学空天科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2024年第5期1792-1800,共9页Systems Engineering and Electronics

基　　金：湖北省重点研发计划(2022BID017);广东省重点领域研发计划(2019B010158001)资助课题。

摘　　要：针对低轨巨型星座网络星间路由复杂、网关卫星负载不均衡等问题,在星地接入策略中考虑星间路由代价,提出一种基于最小路由代价的接入策略。该策略分为3个阶段:在最短跳数估计阶段,根据用户终端和信关站位置估算用户终端至网关卫星的星间路由跳数;在网关卫星分配阶段,基于估计跳数建立二分图模型,采用带权最小代价匹配算法确定网关卫星和接入卫星类型;在接入卫星选择阶段,以星间路由跳数和星地仰角加权构造接入准则,在确定类型的可视卫星中选择最优接入卫星。仿真结果表明,所提方法能够显著降低系统整体星间路由跳数,提高网关卫星负载均衡性和用户接入成功率。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.

关 键 词：巨型星座网络 最小路由代价 网关匹配 接入策略 负载均衡 

分 类 号：TN92[电子电信—通信与信息系统]