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This study introduces new routing algorithms for wavelength-space-wavelength (WSW) switching fabrics in elastic optical networks. These algorithms improve routing efficiency and reduce costs for large-scale networks.

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Area of Science:

  • Telecommunications Engineering
  • Computer Networking
  • Optical Networks

Background:

  • Elastic optical networks (EONs) utilize wavelength-space-wavelength (WSW) switching fabrics.
  • Existing research on WSW fabrics, specifically WSW1(r, n, k), is limited to small input/output capacities (r ≤ 3).
  • Scaling routing strategies for larger WSW fabrics remains a challenge.

Purpose of the Study:

  • To investigate the three-stage WSW switching fabric architecture for nodes in EONs.
  • To develop and analyze routing algorithms for simultaneous connection routing in WSW fabrics.
  • To improve upon existing routing estimations for WSW fabrics with higher capacities.

Main Methods:

  • Focus on simultaneous connection routing in WSW1(r, n, k) switching networks.
  • Extension of routing analysis from 3-input/output to 4-input/output WSW fabrics.
  • Development of six novel routing algorithms based on matrix decomposition.

Main Results:

  • Improved routing results for WSW fabrics with four inputs and outputs.
  • Estimation of routing performance for WSW fabrics with arbitrary input/output numbers.
  • Derivation of success criteria for the proposed routing algorithms.

Conclusions:

  • The proposed routing algorithms enable the construction of nonblocking WSW switching fabrics.
  • Reduced number of wavelength converters required in the fabric.
  • Potential for significant reduction in overall switching fabric cost.