Multipacket Routing on 2-D Meshes and Its Application to Fault-Tolerant Routing

  • Authors:
  • Kazuo Iwama;Eiji Miyano

  • Affiliations:
  • -;-

  • Venue:
  • ESA '99 Proceedings of the 7th Annual European Symposium on Algorithms
  • Year:
  • 1999

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Abstract

Our model in this paper is the standard, two-dimensional n脳n mesh. The first result is a randomized algorithm for h-h routing which runs in O(hn) steps with high probability using queues of constant size. The previous bound is 0:5hn + o(hn) but needs the queue-size of 驴(h). An important merit of this algorithm is to give us improved bounds by applying several schemes of faultymesh routing. For example, the scheme by [Rag95], originally O(n log n) time and O(log2 n) queue-size, gives us an improved routing algorithm on p-faulty meshes (p ≤ 0:4) which runs in O(nlog2 n/k) time using O(k) queue-size for any k 驴 log n. Thus, when k = log n it improves the queue-size by the factor of log n without changing the time bound and when k is constant, it needs only constant queue-size although the running time slows down by the factor of log n.