Routing permutations in partitioned optical passive stars networks

  • Authors:
  • Alessandro Mei;Romeo Rizzi

  • Affiliations:
  • Department of Computer Science, University of Rome "La Sapienza," Rome, Italy;Department of Information and Communication Technology, University of Trento, Italy

  • Venue:
  • Journal of Parallel and Distributed Computing - Special section best papers from the 2002 international parallel and distributed processing symposium
  • Year:
  • 2003

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Abstract

It is shown that a Partitioned Optical Passive Stars (POPS) network with g groups and d processors per group can route any permutation among the n = dg processors in one slot when d = 1 and 2 ⌈d/g⌉ slots when d 1. The number of slots used is optimal in the worst case, and is at most the double of the optimum for all permutations π such that π(i) ≠ i, for all i.