Fault-Hamiltonicity of Hypercube-Like Interconnection Networks

  • Authors:
  • Jung-Heum Park;Hee-Chul Kim;Hyeong-Seok Lim

  • Affiliations:
  • The Catholic University of Korea;Hankuk University of Foreign Studies, Korea;Chonnam National University, Korea

  • Venue:
  • IPDPS '05 Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Papers - Volume 01
  • Year:
  • 2005

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Abstract

We call a graph G to be f-fault hamiltonian (resp. f-fault hamiltonian-connected) if there exists a hamiltonian cycle (resp. if each pair of vertices are joined by a hamiltonian path) in G\F for any set F of faultry elements with |F| 驴 f.In this paper, we deal with the graph G驴 and G驴 with n vertices each by n pairwise nonadjacent edges joining vertices in G驴 and vertices in G驴.Provided each G_i is f-fault hamiltonian-connected and f + 1-fault hamiltonian, 0 驴 i 驴 3, we show that G驴 驴 G驴.Many interconnection networks such as hypercube-like interconnection networks can be represented in the form of G驴 驴 驴 connecting two lower dimensional networks G驴 and G驴.Applying our main results to a subclass of hypercube-like interconnection networks, called restricted HL-graphs, which include twisted cubes, crossed cubes, multiply twisted cubes, Möbius cubes, Mcubes, and generalized twisted cubes, we show that every restricted HL-graph of degree m(驴 3) is m - 3-fault hamiltonian-connected and m - 2-fault hamiltonian.