arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.00701cs.DC
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匿名移动机器人的记忆最优分散

Memory Optimal Dispersion by Anonymous Mobile Robots

Archak Das, Kaustav Bose, Buddhadeb Sau

摘要:

考虑一组$k \leq n$自主移动机器人最初放置在具有$n$节点的任意图$G$的节点处。分散问题要求一种分布式算法,该算法允许机器人达到每个机器人位于图的不同节点的配置。如果机器人是匿名的,即,它们没有任何唯一标识符,则该问题不能通过任何确定性算法来解决。然而,即使是匿名机器人也可以解决这个问题,如果每个机器人都可以获得一个公平的硬币,他们可以用它来生成随机比特。在该设置中,已知机器人需要存储器的$Ω(\logΔ)$位来实现分散,其中$Δ$是$G$的最大程度。另一方面,最著名的内存上限是$min \{Δ, max\{\logΔ, \log{D}\}\}$($D$ = $G$的直径),它可以是$ω(\logΔ)$,这取决于$Δ$和$D$的值。在本文中,我们提出了一个最佳的算法,需要$O(\logΔ)$位的内存来缩小这一差距。

英文摘要:

Consider a team of $k \leq n$ autonomous mobile robots initially placed at a node of an arbitrary graph $G$ with $n$ nodes. The dispersion problem asks for a distributed algorithm that allows the robots to reach a configuration in which each robot is at a distinct node of the graph. If the robots are anonymous, i.e., they do not have any unique identifiers, then the problem is not solvable by any deterministic algorithm. However, the problem can be solved even by anonymous robots if each robot is given access to a fair coin which they can use to generate random bits. In this setting, it is known that the robots require $Ω(\logΔ)$ bits of memory to achieve dispersion, where $Δ$ is the maximum degree of $G$. On the other hand, the best known memory upper bound is $min \{Δ, max\{\logΔ, \log{D}\}\}$ ($D$ = diameter of $G$), which can be $ω(\logΔ)$, depending on the values of $Δ$ and $D$. In this paper, we close this gap by presenting an optimal algorithm requiring $O(\logΔ)$ bits of memory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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