Fault-tolerant and deadlock-free routing in 2-D meshes using rectilinear-monotone polygonal fault blocks

Jie Wu, Dajin Wang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We propose a deterministic fault-tolerant and deadlock-free routing protocol in 2-dimensional (2-D) meshes based on Wu's fault-tolerant odd-even turn model and Wang's rectilinear-monotone polygonal fault block model. The fault-tolerant odd-even turn protocol, also called extended X-Y routing, was originally proposed to achieve fault-tolerant and deadlock-free routing among traditional, rectangular fault blocks. It uses no virtual channels. The number of faults to be tolerated is unbounded as long as nodes outside fault blocks are connected in the mesh network. The recently proposed rectilinear-monotone polygonal fault blocks (also called minimal-connected-components or MCCs) are of the polygonal shapes, and are a refinement of rectangular fault blocks. The formation of MCCs depends on the relative locations of source and destination, and MCCs include far fewer healthy nodes in resultant fault blocks. In this paper, we show that with a simple modification, the extended X-Y routing can also be applied to 2-D meshes using extended MCCs.

Original languageEnglish
Pages (from-to)99-111
Number of pages13
JournalInternational Journal of Parallel, Emergent and Distributed Systems
Issue number2
StatePublished - Jun 2005


  • Deadlock-free routing
  • Deterministic routing
  • Fault models
  • Fault tolerance
  • Turn models
  • Virtual channels


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