南京大学学报(自然科学版) ›› 2018, Vol. 54 ›› Issue (3): 529537.
李子璇,严志博,赵康僆 *,李文峰
Li Zixuan, Yan Zhibo, Zhao Kanglian*, Li Wenfeng
摘要: 导航星座网络具有拓扑动态变化,物理链路间断可用,时延较长,信道误码率较大,以及星间链路资源与星上处理资源有限等特点。在导航星座网络中,实际传输的数据流量种类多样,且往往分布不均。其链路调度一般都是事先规划好的,具有可预测性和周期性,相较一般的卫星通信网络,具有更强的规律性。如何应对导航星座网络中的各种问题并利用导航星座网络的独特特性,实现数据的高效传输,选用合适的路由算法十分关键。目前,针对卫星网络的路由算法多数基于通信卫星星座来开展研究,针对带有指向性天线分时隙通信的导航星座网络的算法不太多,本文对已提出的几种具有代表性的空间路由算法进行分析,并选取最短时延下最少跳数路由和连接图路由进行重点研究,通过OPNET对路由机制的性能进行仿真评估,得出有关导航星座网络中路由算法的适用性准则,为导航星座网络中路由算法的设计和选用提供参考。
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