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Brief Announcement: Simple Majority Consensus in Networks with Unreliable Communication

Authors Ariel Livshits , Yonatan Shadmi , Ran Tamir (Averbuch)



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Author Details

Ariel Livshits
  • Technion - Israel Institute of Technology, Haifa, Israel
Yonatan Shadmi
  • Technion - Israel Institute of Technology, Haifa, Israel
Ran Tamir (Averbuch)
  • Technion - Israel Institute of Technology, Haifa, Israel

Acknowledgements

The authors thank Yoram Moses for his invaluable comments and suggestions.

Cite AsGet BibTex

Ariel Livshits, Yonatan Shadmi, and Ran Tamir (Averbuch). Brief Announcement: Simple Majority Consensus in Networks with Unreliable Communication. In 35th International Symposium on Distributed Computing (DISC 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 209, pp. 59:1-59:4, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2021)
https://doi.org/10.4230/LIPIcs.DISC.2021.59

Abstract

In this work, we consider a synchronous model of n faultless agents, with a complete communication graph and messages that are lost with some constant probability q ∈ (0,1). In this model we show that there exists a protocol, called the Simple Majority Protocol, that solves consensus in 3 communication rounds with probability of agreement converging to 1 as n → ∞. We also prove that 3 communication rounds are necessary for the SMP to achieve consensus, with high probability.

Subject Classification

ACM Subject Classification
  • Theory of computation → Distributed algorithms
Keywords
  • Majority consensus
  • probabilistic message loss
  • distributed systems

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References

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  6. Ran Tamir, Ariel Livshits, and Yonatan Shadmi. Simple majority consensus in networks with unreliable communication. arXiv preprint, 2021. URL: http://arxiv.org/abs/2104.04996.
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