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Search on a line with faulty robots
Distributed Computing ( IF 1.3 ) Pub Date : 2017-03-07 , DOI: 10.1007/s00446-017-0296-0
Jurek Czyzowicz , Evangelos Kranakis , Danny Krizanc , Lata Narayanan , Jaroslav Opatrny

We consider the problem of searching on a line using n mobile robots, of which at most f are faulty, and the remaining are reliable. The robots start at the same location and move in parallel along the line with the same speed. There is a target placed on the line at a location unknown to the robots. Reliable robots can find the target when they reach its location, but faulty robots cannot detect the target. Our goal is to design a parallel algorithm minimizing the competitive ratio, represented by the worst case ratio between the time of arrival of the first reliable robot at the target, and the distance from the source to the target. If $$n \ge 2f+2$$n≥2f+2, there is a simple algorithm with a competitive ratio of 1. For $$f< n < 2f+2$$f

中文翻译:

在有故障机器人的线上搜索

我们考虑使用n个移动机器人在一条线上搜索的问题,其中最多f个有故障,其余是可靠的。机器人从相同的位置开始并以相同的速度沿线平行移动。在机器人未知的位置放置了一个目标。可靠的机器人到达目标位置后可以找到目标,但故障机器人无法检测到目标。我们的目标是设计一种并行算法,最小化竞争比率,由第一个可靠机器人到达目标的时间与从源到目标的距离之间的最坏情况比率表示。如果$$n \ge 2f+2$$n≥2f+2,则有一个简单的算法,竞争比为1。对于$$f< n < 2f+2$$f
更新日期:2017-03-07
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