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有限内存机器人在有限可见度下的异步集结

Asynchronous Gathering of Robots with Finite Memory on a Circle under Limited Visibility

Satakshi Ghosh, Avisek Sharma, Pritam Goswami, Buddhadeb Sau

摘要:

考虑一组$n$移动实体,称为机器人,位于连续圆上并在其上操作,即,所有的机器人最初都在圆上的不同位置。\textit{gathering}问题要求设计一个分布式算法,允许机器人在圆上的一个点组装。机器人是匿名的,相同的,同质的。机器人在圆形路径内以确定性的“看-计算-移动”循环运行。机器人同意顺时针方向。机器人的运动是刚性的,并且它们具有有限的可见性$π$,即,每个机器人只能看到与机器人的角距离严格小于$π$的圆的点。迪卢娜\textit{et al}。[DISC'2020]提出了一种在半同步(\textsc{SSync})调度器中循环的不经意和沉默机器人的确定性收集算法。布钦\textit{et al}。[IPDPS(2021年12月)]表明,在完全可见性下,具有\textsc{SSync}调度程序的$\mathcal{OBLOT}$机器人模型与具有异步(\textsc{ASync})调度程序的$\mathcal{FSTA}$机器人(机器人是静默的,但具有有限的持久内存)模型不可比较。在有限的可见度下,这种比较仍然没有答案。因此,本文的工作扩展了Di Luna的工作\textit{et al}。[DISC'2020]在用于$\mathcal{FSTA}$机器人模型的\textsc{ASync}调度程序下。

英文摘要:

Consider a set of $n$ mobile entities, called robots, located and operating on a continuous circle, i.e., all robots are initially in distinct locations on a circle. The \textit{gathering} problem asks to design a distributed algorithm that allows the robots to assemble at a point on the circle. Robots are anonymous, identical, and homogeneous. Robots operate in a deterministic Look-Compute-Move cycle within the circular path. Robots agree on the clockwise direction. The robot's movement is rigid and they have limited visibility $π$, i.e., each robot can only see the points of the circle which is at an angular distance strictly less than $π$ from the robot. Di Luna \textit{et al}. [DISC'2020] provided a deterministic gathering algorithm of oblivious and silent robots on a circle in semi-synchronous (\textsc{SSync}) scheduler. Buchin \textit{et al}. [IPDPS(W)'2021] showed that, under full visibility, $\mathcal{OBLOT}$ robot model with \textsc{SSync} scheduler is incomparable to $\mathcal{FSTA}$ robot (robots are silent but have finite persistent memory) model with asynchronous (\textsc{ASync}) scheduler. Under limited visibility, this comparison is still unanswered. So, this work extends the work of Di Luna \textit{et al}. [DISC'2020] under \textsc{ASync} scheduler for $\mathcal{FSTA}$ robot model.

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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