基于地心天际球面坐标的低轨卫星通信网络簇结构协同工作机制设计

低轨LEO（Low earth orbit）卫星通信网络系统星间链路结构与链接关系十分复杂，如何实现该系统的高度可靠、高效工作是一件十分复杂和困难的工作。传统路由算法多选择分布式路由，忽略了卫星内部的分簇管理，在一定程度上，大大增加了算法的时间复杂度和空间复杂度。针对此问题，本文从LEO卫星通信网络的特征出发，运用空间通信技术，分簇规划技术与排队图示评审技术Q-GERT（Queuing graphic evaluation review technique），首先构建LEO卫星通信网络的地心天际球面坐标体系，搭建具有分簇架构的多层次通信网络；其次基于网络综合效能最优化，设计能够实现高度分布式协同通信业务管理的路由模型与算法；最后通过案例研究，表明本文所提工作机制的实用性与有效性。

Clustering Structure Cooperative Working Mechanism Design of Low Orbit Satellite Communication Network Based on Spherical Coordinate System

The structure of LEO (low-orbit) satellite communication network systems and the inter-satellite link relationship are very complicated. How to achieve highly reliable and efficient work of the system is a very complicated and difficult task. Traditional routing algorithms mostly choose distributed routing, ignoring the cluster management within the satellite, to a certain extent, greatly increasing the time complexity and space complexity of the algorithm. In view of this problem, this article starts from the characteristics of the LEO satellite communication network, and uses space communication technology, cluster planning technology and queuing graphic evaluation review technique (Q-GERT) to first construct the geocentric sky of the LEO satellite communication network. A multi-layer communication network with a clustered architecture is built; Secondly, based on the optimization of network comprehensive efficiency, routing models and algorithms that can achieve highly distributed cooperative communication business management are designed; Finally, the practicality and effectiveness of the proposed working mechanism was demonstrated by case study.