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Leader election for anonymous asynchronous agents in arbitrary networks

Abstract

We consider the problem of leader election among mobile agents operating in an arbitrary network modeled as an undirected graph. Nodes of the network are unlabeled and all agents are identical. Hence the only way to elect a leader among agents is by exploiting asymmetries in their initial positions in the graph. Agents do not know the graph or their positions in it, hence they must gain this knowledge by navigating in the graph and share it with other agents to accomplish leader election. This can be done using meetings of agents, which is difficult because of their asynchronous nature: an adversary has total control over the speed of agents. When can a leader be elected in this adversarial scenario and how to do it? We give a complete answer to this question by characterizing all initial configurations for which leader election is possible and by constructing an algorithm that accomplishes leader election for all configurations for which this can be done.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
DISTRIBUTED COMPUTING no. 27, edition 1, pages 21 - 38,
ISSN: 0178-2770
Language:
English
Publication year:
2014
Bibliographic description:
Dereniowski D., Pelc A.: Leader election for anonymous asynchronous agents in arbitrary networks// DISTRIBUTED COMPUTING. -Vol. 27, iss. 1 (2014), s.21-38
DOI:
Digital Object Identifier (open in new tab) 10.1007/s00446-013-0196-x
Verified by:
Gdańsk University of Technology

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