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On the Power of Graphical Reconfigurable Circuits

Authors Yuval Emek , Yuval Gil , Noga Harlev

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  • Theory of computation → Distributed algorithms
Keywords
  • graphical reconfigurable circuits
  • bounded uniformity
  • beeping

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Abstract

We introduce the graphical reconfigurable circuits (GRC) model as an abstraction for distributed graph algorithms whose communication scheme is based on local mechanisms that collectively construct long-range reconfigurable channels (this is an extension to general graphs of a distributed computational model recently introduced by Feldmann et al. (JCB 2022) for hexagonal grids). The crux of the GRC model lies in its modest assumptions: (1) the individual nodes are computationally weak, with state space bounded independently of any global graph parameter; and (2) the reconfigurable communication channels are highly restrictive, only carrying information-less signals (a.k.a. beeps). Despite these modest assumptions, we prove that GRC algorithms can solve many important distributed tasks efficiently, i.e., in polylogarithmic time. On the negative side, we establish various runtime lower bounds, proving that for other tasks, GRC algorithms (if they exist) are doomed to be slow.

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Yuval Emek, Yuval Gil, and Noga Harlev. On the Power of Graphical Reconfigurable Circuits. In 38th International Symposium on Distributed Computing (DISC 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 319, pp. 22:1-22:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024) https://doi.org/10.4230/LIPIcs.DISC.2024.22

Author Details

Yuval Emek
  • Technion - Israel Institute of Technology, Haifa, Israel
Yuval Gil
  • Technion - Israel Institute of Technology, Haifa, Israel
Noga Harlev
  • Technion - Israel Institute of Technology, Haifa, Israel

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