Asynchronous Exclusive Perpetual Grid Exploration without Sense of Direction
Asynchronous Exclusive Perpetual Grid Exploration without Sense of Direction
复制标题
异步独家永无方向感的网格探索
DOI:
10.1007/978-3-642-25873-2_18
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
S.Tixeuil
中科院分区:
文献类型:
--
作者:
F.Bonnet;A.Milani;M.Potop-Butucaru;S.Tixeuil
In this paper, we investigate the exclusive perpetual exploration of grid shaped networks using anonymous, oblivious and fully asynchronous robots. Our results hold for robots without sense of direction (i.e.they do not agree on a common North, nor do they agree on a common left and right ; furthermore, the “North” and “left” of each robot is decided by an adversary that schedules robots for execution, and may change between invocations of particular robots). We focus on the minimal number of robots that are necessary and sufficient to solve the problem in general grids.In more details, we prove that three deterministic robots are necessary and sufficient, provided that the size of the grid isn×mwith 3 ≤n≤morn= 2 andm≥ 4. Perhaps surprisingly, and unlike results for the exploration with stop problem (where grids are “easier” to explore and stop than rings with respect to the number of robots), exclusive perpetual exploration requires as many robots in the ring as in the grid.Furthermore, we propose a classification of configurations such that the space of configurations to be checked is drastically reduced. This pre-processing lays the bases for the automated verification of our algorithm for general grids as it permits to avoid combinatorial explosion.
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DOI:
10.1016/j.tcs.2008.07.026
发表时间:
2008
期刊:
Theor. Comput. Sci.
影响因子:
--
作者:
P. Flocchini;G. Prencipe;N. Santoro;P. Widmayer
通讯作者:
P. Widmayer
DOI:
10.1007/978-3-642-15763-9_29
发表时间:
2010
期刊:
--
影响因子:
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作者:
Lélia Blin;A. Milani;M. Potop;S. Tixeuil
通讯作者:
S. Tixeuil
DOI:
--
发表时间:
2008
期刊:
International Conference on Principles of Distributed Systems
影响因子:
--
作者:
R. Klasing;A. Kosowski;A. Navarra
通讯作者:
A. Navarra
DOI:
10.1007/978-3-642-33536-5_7
发表时间:
2011
期刊:
--
影响因子:
--
作者:
Stéphane Devismes;Anissa Lamani;F. Petit;Pascal Raymond;S. Tixeuil
通讯作者:
S. Tixeuil
DOI:
10.1016/j.tcs.2013.05.031
发表时间:
2009
期刊:
ArXiv
影响因子:
--
作者:
Stéphane Devismes;F. Petit;S. Tixeuil
通讯作者:
S. Tixeuil