基于低轨全覆盖卫星星座的反向缝建链策略  

A Link-building Strategy for Cross Seam in LEO Satellite Constellation

作　　者：万威 曾媛 任欣悦 欧阳尚荣[1] WAN Wei;ZENG Yuan;REN Xinyue;OUYANG Shangrong(Shanghai Spaceflight Institute of TT&C and Telecommunication,Shanghai 201109)

机构地区：[1]上海航天测控通信研究所,上海201109

出　　处：《上海航天（中英文）》2023年第6期54-63,共10页Aerospace Shanghai（Chinese&English）

摘　　要：低轨卫星星座的拓扑设计是天地一体化网络部署中较为重要的一环。在低轨卫星网络中,如何设计星座拓扑来提升卫星网络的稳定性与传输性能,是亟待解决的问题。提出一种基于轨道覆盖带方法的低轨持续全覆盖卫星星座设计方法,通过该方法构建低轨卫星星座,满足覆盖性能,可有效减少卫星切换的次数。基于构建的星座拓扑,制定邻轨k最近邻星的反向缝建链策略,优化设计链路长度和链路持续时长,获取网络传输性能与稳定性的平衡。仿真结果表明:通过上述方法设计出的星座,在满足对地持续全覆盖性能的情况下,相较于轨道覆盖带方法切换次数减少10%;邻轨k最近邻星策略相较于最短建链策略,拓扑稳定性能提升79.62%,使网络拓扑稳定性与传输性能达到更优的平衡。The topology design of low-earth-orbit(LEO)satellite constellation is an important part for the deployment of space-ground integrated networks.In LEO networks,how to design a constellation topology to improve the stability and transmission performance of satellite networks is an urgent problem to be solved.In view of this,in this paper,a design method of continues full-coverage LEO satellite constellation based on the satellite orbit coverage(SOC)is proposed.With the method,an LEO satellite constellation is constructed.It is shown that the constructed constellation not only meet the coverage performance,but also can reduce the switching times.Based on the constructed constellation,a link-building strategy for cross seam,named as the kth nearest satellite in adjacent orbits(kth NSAO),is generated,aiming to obtain the balance between the transmission performance and stability of the network by means of making a trade-off between the link length and the link duration.The simulation results show that,compared with the SOC method,the constellation designed by the proposed method can reduce the switching times by 10%under the continuous full-coverage condition.Compared with the counter-rotating seam inter-satellite links(CRS-ISL),the kth NSAO can improve the topological stability performance by 79.62%,so that the network can achieve a better balance between the topology stability and the transmission performance.

关 键 词：低轨卫星星座设计 反向缝建链策略 星座覆盖率 网络健壮性 动态半分带宽 

分 类 号：TP927.2[自动化与计算机技术]