一种考虑异常中断的导航星座星间链路路由改进算法

来源期刊:中南大学学报(自然科学版)2014年第3期

论文作者:王东会 刘文祥 唐小妹 黄仰博

文章页码:762 - 769

关键词:导航星间链路;异常中断;星间测距;K短路径算法;泛洪策略

Key words:navigation inter-satellite link; abnormal link disruption; inter-satellite ranging; K shortest paths algorithm; flood method

摘    要:为解决导航星座星间链路异常中断时的路由问题,提出一种考虑链路异常状态的路由改进算法。通过导航星座特有的星间测距信息进行链路异常检测与识别,根据检测出的链路异常状态对K短路径路由算法进行改进。对改进算法与K短路径算法及泛洪策略进行比较分析,研究结果表明:在处理链路异常中断时,改进算法比泛洪策略增加的额外链路负担更小,时效性更高;而在链路传输时延及链路切换次数上改进算法与K短路径算法相当。

Abstract: To solve the routing problem of navigation inter-satellite link under abnormal link disruption conditions, an improved routing algorithm was proposed. Inter-satellite ranging was adopted for link abnormity detection and identification, and K shortest paths algorithm was improved by adding link abnormity status. Comparison simulation analysis between the improved algorithm and K shortest paths adding flood method was given. Results show that the additional link cost of the improved algorithm is much less than that of the flood method when the abnormal link disruption is solved, and in the aspects of link transmission delay and switch number, the improved algorithm and K shortest paths show little difference.

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