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The Role of Network Topologies in the Optical Core of IP-over-WDM Networks with Static Wavelength Routing

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Abstract

In this paper, we present a performance analysis of network topologies for the optical core of IP-over-WDM networks with static wavelength routing. The performance analysis is focused on regular degree four topologies, and, for comparison purposes, degree three topologies are also considered. It is shown that the increase of the nodal degree from three (degree three topology with smallest diameter) to four (degree four topology with smallest diameter) improves the network performance if a larger number of wavelengths per link is available. However, the influence of wavelength interchange on the nodal degree gain is small. The performance of regular degree four topologies with smallest diameter is also compared with the performance of mesh–torus topologies (which are also degree four topologies), and it is shown that the blocking probability of degree four topologies with smallest diameter is about two orders of magnitude lower than the blocking probability of mesh–torus topologies. It is also presented a performance comparison of WDM-based networks with nodal degrees ranging from two to five and it is shown that the increase of the nodal degree from two to three leads to high nodal degree gains, while de increase of the nodal degree from four to five leads to low nodal degree gains. These results show that degree three and degree four topologies are very attractive for use in the optical core of IP-over-WDM networks.

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Authors and Affiliations

  1. Department of Informatics, University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001, Covilhã, Portugal

    Mário M. Freire & Joel J.P.C. Rodrigues

  2. Superior School of Technology, Polytechnic Institute of Castelo Branco, Avenida do Empresário, 6000-000, Castelo Branco, Portugal

    Rui M.F. Coelho

Authors
  1. Mário M. Freire
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  2. Joel J.P.C. Rodrigues
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  3. Rui M.F. Coelho
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Corresponding author

Correspondence to Joel J.P.C. Rodrigues.

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Freire, M.M., Rodrigues, J.J. & Coelho, R.M. The Role of Network Topologies in the Optical Core of IP-over-WDM Networks with Static Wavelength Routing. Telecommunication Systems 24, 111–122 (2003). https://doi.org/10.1023/A:1026106627769

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  • DOI: https://doi.org/10.1023/A:1026106627769

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