Fault-tolerant cycle embedding in the faulty hypercubes

  • Authors:
  • Dongqin Cheng;Dachang Guo

  • Affiliations:
  • -;-

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2013

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Abstract

The hypercube is one of the best known interconnection networks. Embedding cycles of all possible lengths in faulty hypercubes has received much attention. Let F"v (respectively, F"e) denote the set of faulty vertices (respectively, faulty edges) and f"v (respectively, f"e) denote the number of faulty vertices (respectively, faulty edge) in an n-dimensional hypercube Q"n. Let f(e) denote the number of faulty nodes and/or faulty edges incident with the end-vertices of an edge e@?E(Q"n). In this paper, we assume that each node is incident with at least three fault-free neighbors and at least three fault-free edges. Under this assumption, we show that every fault-free edge lies on a fault-free cycle of every even length from 4 to 2^n-2|F"v| if |F"v|+|F"e|==5. Under our condition, our result not only improves the previously best known result of Hsieh et al. [S.-Y. Hsieh, T.-H. Shen, Edge-bipancyclicity of a hypercube with faulty vertices and edges, Discrete Applied Mathematics 156 (10) (2008) 1802-1808] where f"v+f"e=