Efficient wavelength routing on directed fiber trees

  • Christos Kaklamanis
  • Pino Persiano
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1136)


We address the issue of efficiently assigning wavelengths to communication requests in wavelength division multiplexing (WDM) optical networks. We consider directed tree and tree of rings topologies. These are topologies of concrete practical relevance for which undirected underlying graph models have been studied by Raghavan and Upfal [6]. Directed models were first studied by Mihail et al [4].

For trees, we give a polynomial time routing algorithm that, for requests of maximum load L per directed fiber link, uses at most 7/4L wavelengths. This improves the bound of Mihail et al.. As a corollary we also give an algorithm for trees of rings that uses 7/2L wavelengths.


Bipartite Graph Optical Network Wavelength Division Multiplex Single Color Fiber Link 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Christos Kaklamanis
    • 1
  • Pino Persiano
    • 2
  1. 1.Computer Technology InstituteUniversity of PatrasRioGreece
  2. 2.Dipartimento di Informatica ed Appl.Università di SalernoBaronissiItaly

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