Fault-Free Cycles in Conditional Faulty Folded Hypercubes

  • Authors:
  • Che-Nan Kuo;Sun-Yuan Hsieh

  • Affiliations:
  • Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan 70101;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan 70101

  • Venue:
  • ICA3PP '09 Proceedings of the 9th International Conference on Algorithms and Architectures for Parallel Processing
  • Year:
  • 2009

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Abstract

An n -dimensional folded hypercube FQ n is an attractive variance of an n -dimensional hypercube Q n , which is obtained by a standard hypercube with some extra edges established between its vertices. FQ n for any odd n is known to be bipartite. In this paper, for any FQ n (n *** 2) with at most 2n *** 3 faulty edges in which each vertex is incident with at least two fault-free edges, we prove that there exists a fault-free cycle of every even length from 4 to 2 n , and when n *** 2 is even, there also exists a fault-free cycle of every odd length from n + 1 to 2 n *** 1. The result is optimal with respect to the number of edges faults tolerated.