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具有高度动态性的低轨(LEO)卫星星座系统是移动通信的重要组成部分.由于卫星网络具有动态性高、星间传输时延大、资源有限和网络拓扑周期时变等特点,使得LEO星座系统的自主管理非常困难.针对上述问题,提出了具有针对性的CDCA算法,通过构建簇的方法来实现对星座系统的管理.CDCA的设计中充分考虑了LEO星座的实际特性和资源情况,利用不同轨道卫星的属性对簇内成员进行等级划分,提高了簇结构的稳定度,降低了簇的维护开销.通过分析及仿真实验表明,CDCA算法较现有方法在性能表现和维护通信开销等方面均有较大的提高.
LEO satellite constellation system with high dynamic is an important part of mobile communications.As the satellite network has such characteristics as high dynamic, large transmission delay between the stars, limited resources and time-varying network topology, the LEO constellation The system is very difficult to manage autonomously.Aiming at the above problems, we propose a targeted CDCA algorithm to realize the management of constellation system through the method of building cluster.CDCA has fully considered the actual characteristics and resources of LEO constellation, The attributes of different orbiting satellites classify the members in the cluster, which improves the stability of the cluster structure and reduces the overhead of cluster maintenance.According to the analysis and simulation results, it is found that the CDCA algorithm outperforms the existing methods in terms of performance and maintenance of communication overhead Have greater improvement.