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Signaling Extensions for Wavelength Switched Optical Networks. draft-bernstein-ccamp-wson-signaling-03.txt. Greg Bernstein Grotto Networking Young Lee Huawei Sugang Xu NICT Hiroaki Harai NICT Daniel King Old Dog Consulting. WSON Signaling Extensions.

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Signaling extensions for wavelength switched optical networks

Signaling Extensions for Wavelength Switched Optical Networks

draft-bernstein-ccamp-wson-signaling-03.txt

Greg Bernstein Grotto Networking

Young Lee Huawei

Sugang Xu NICT

Hiroaki Harai NICT

Daniel King Old Dog Consulting


Wson signaling extensions
WSON Signaling Extensions

  • Provide extensions to Generalized Multi-Protocol Label Switching (GMPLS) signaling for control of Wavelength Switched Optical Networks (WSON).

    Changes from 02:

  • Added requirements for support of distributed wavelength assignment applications/optimizations.

  • Generalized Wavelength Set Metric TLV for additional use scenarios/applications.

  • Added explanatory text on three new applications/optimizations.


New wson signaling requirements
New WSON Signaling Requirements

  • Distributed Wavelength Assignment Support:

    • Backward Blocking Reduction

      In WSON without wavelength converters, backward blocking due to resource contentions is the predominant blocking contribution, when traffic load is low or highly-dynamic as when lightpath restoration takes place [Giorgetti08].

    • Efficient Wavelength Converter Assignment

      When a WSON has some nodes with wavelength converters the efficient use of these scarce resources is desired [Andriolli06].

    • Shared Mesh Wavelength Assignment

      The reuse of protection bandwidth is desirable in some applications. In WSONs we need to consider wavelength selection in this process [Ji].


New contributors and references
New Contributors and References

  • Contributors

    • Nicola Andriolli (Scuola Superiore Sant’Anna, Pisa, Italy)

    • Aessio Giorgetti (Scuola Superiore Sant’Anna, Pisa, Italy)

    • Lin Guo (Beijing University of Posts and Telecommunications)

  • References

    • [Andriolli06] N. Andriolli et al., "Label preference schemes in GMPLS controlled networks," Communications Letters, IEEE, vol. 10, 2006, pp. 849-851.

    • [Giorgetti08] Alessio Giorgetti, Nicola Sambo, Isabella Cerutti, Nicola Andriolli, and Piero Castoldi, "Label Preference Schemes for Lightpath Provisioning and Restoration in Distributed GMPLS Networks", to appear IEEE Journal of Lightwave Technology.

    • [Ji] Yuefeng Ji and Lin Guo, "MSWS Method to Support Shared-Mesh Restoration for Wavelength Switched Optical Networks", work in progress: draft-ji-ccamp-wson-msws-00.txt, July 2008.


New wavelength set metric
New Wavelength Set Metric

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Type | Strct | MSize | Num Metrics |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Wavelength Metric Info |

| From lowest to highest frequency if more that one value |

| ... |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  • Type

    • 0 - Backward blocking reduction [Giorgetti08]

    • 1 - Wavelength converter assignment [Andriolli06]

    • 2 - Most Sharable Wavelength per Segment mesh restoration wavelength assignment method [Ji]

    • 3 - Least Loaded Wavelength Assignment

  • Strct (0 → Single Value, 1 → List)

  • MSize (0 → 8 bits, 1 → 16 bits, 2 → 32 bits)


Next steps
Next Steps

  • Adopt as a WG document 

  • Work to finalize signal characterization

    • (working with ITU-T on this)

  • Assess demand for distributed bidirectional lightpath assignment using different wavelengths on different directions.

  • Revise encodings as necessary


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