Reliable communication in faulty star networks

K. Day, A. E. Al-Ayyoub

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


We take advantage of the hierarchical structure of the star graph network to obtain an efficient method for constructing node-disjoint paths between arbitrary pairs of nodes in the network. A distributed fault-tolerant routing algorithm for the star network based on this construction method is then presented and evaluated. The proposed algorithm adapts the routing decisions in response to node failures. Node failure and repair conditions may arise dynamically (at any time) provided that the total number of faulty nodes at any given time is less than the node-connectivity n-1 of the n-star. We show that if the node failures occur 'reasonably' apart in time, then all messages will be routed on paths of length δ + ϵ where δ is the minimum distance between the source and the destination and ϵ is 0, 2, or 4. In the unlikely case where more failures occur in a 'short period', the algorithm still delivers all messages but via possibly longer paths.

Original languageEnglish
Title of host publicationProceedings - International Parallel and Distributed Processing Symposium, IPDPS 2002
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages1
ISBN (Print)0769515738, 9780769515731
Publication statusPublished - 2002
Event16th International Parallel and Distributed Processing Symposium, IPDPS 2002 - Ft. Lauderdale, United States
Duration: Apr 15 2002Apr 19 2002


Other16th International Parallel and Distributed Processing Symposium, IPDPS 2002
Country/TerritoryUnited States
CityFt. Lauderdale


  • distributed algorithm
  • Fault tolerance
  • node-disjoint paths
  • routing
  • star graph

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Modelling and Simulation


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