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Encoding for WSON Information Model with Impairments Validation.
draft-martinelli-ccamp-wson-iv-encode-01

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This is an older version of an Internet-Draft whose latest revision state is "Replaced".
Authors Giovanni Martinelli , Moustafa Kattan , Gabriele Galimberti , Andrea Zanardi
Last updated 2013-02-23
Replaced by draft-ietf-ccamp-wson-iv-encode
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draft-martinelli-ccamp-wson-iv-encode-01
CCAMP                                                 G. Martinelli, Ed.
Internet-Draft                                                 M. Kattan
Intended status: Standards Track                           G. Galimberti
Expires: August 27, 2013                                           Cisco
                                                         A. Zanardi, Ed.
                                                              CREATE-NET
                                                       February 23, 2013

    Encoding for WSON Information Model with Impairments Validation.
                draft-martinelli-ccamp-wson-iv-encode-01

Abstract

   This document defines proper encoding for the Information Model to
   support Impairment-Aware (IA) Routing and Wavelength Assignment (RWA)
   function.  This operation might be required in Wavelength Switched
   Optical Networks (WSON) that already support RWA, encoding defined
   here goes in addition to available WSON encoding and it is fully
   compatible with it.

   As the information model, the encoding is independent from control
   plane architectures and protocol implementations.  Its definitions
   must be reused in related protocol extensions.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 27, 2013.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal

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   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . . . 3
   2.  Encoding  . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
     2.1.  Optical Parameter . . . . . . . . . . . . . . . . . . . . . 3
     2.2.  Impairment Vector . . . . . . . . . . . . . . . . . . . . . 4
     2.3.  Impairment Matrix . . . . . . . . . . . . . . . . . . . . . 5
   3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 6
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 6
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 6
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 6
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 7

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1.  Introduction

   In case of WSON where optical impairments plays a significant role,
   the framework document [RFC6566] defines related control plane
   architectural options for an Impairment Aware routing and wavelength
   assignment (IA-RWA).  This document provides a suitable encoding for
   the related WSON Impairment Information Model defined
   [I-D.martinelli-ccamp-wson-iv-info].

   This document directly refers to ITU recommendations [ITU.G680] and
   [ITU.G697] as already detailed in the information model.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

2.  Encoding

2.1.  Optical Parameter

   The OPTICAL_PARAM is defined as a sub TLV object.

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |S|        Reserved             |  ParamSource  |    ParamID    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                            Value                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                           Variance                            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   The following flags are defined:

      S. Standard bit.  With S=1 indentify ITU set of parameters, S=0
      identify other set of parameters.

   With the flag S=1 the following parameters are defined:

      ParamSource.  Where this parameter was defined.  Currently only
      [ITU.G697] has defined this with value 1.

      ParamID.  Parameter identifier according to the source.
      [ITU.G697] table V.3 defines the following identifiers:

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         1.  Total Power (dBm)

         2.  Channel Power (dBm)

         3.  Reserved (Defined in [ITU.G697] but not used)

         4.  Reserved (Defined in [ITU.G697] but not used)

         5.  OSNR (db)

         6.  Q Factor (a pure number)

         7.  PMD (ps)

         8.  Residual Chromatic Dispersion (ps/nm)

      Value.  Value for the parameter.  As defined by [ITU.G697] is a 32
      bit IEEE floating point number.

      Variance.  Variance for the parameter, a 32 bit IEEE floating
      point number.

2.2.  Impairment Vector

   This sub-TLV is a list of optical parameters and they MAY be grouped
   by wavelength dependency.  To This purpose an optional Label Set sub-
   TLV is added as a first sub-TLV.

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |W|       Reserved              |            Length             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Label Set                             |
   :                                                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Optical Param sub-TLV(s)                     |
   :                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Where:

      W. Wavelength Dependency flag.  With W=1 there is be a Label Set
      sub-TLV which details to which set of wavelenghs the list of
      parameters is applicable.

      Length, the lenght of this TLV [EDITOR NOTE: may become numbers of
      parameters? length will be already within TLV header].

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      The Label Set object is defined in
      [I-D.ietf-ccamp-general-constraint-encode] Section 2.1.  Likely an
      inclusive range will be the only option required by the Action
      defined in the Label Set.

      Optical Param sub-TLV(s) a list of Object as defined in
      Section 2.1.

2.3.  Impairment Matrix

   As defined by the [I-D.martinelli-ccamp-wson-iv-info] the Impairment
   Matrix follow the same structure as the Connectivity Matrix.

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   | Connectivity  |   MatrixID    |             Reserved      |W|N|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Link Set A #1                         |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Link Set B #1                         |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                Impairment Vector sub-TLV(s)                   |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |       Additional Link Set pairs and Optical Parameters        |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Where:

      Connectivity: value MUST be 2 for the Impairment Matrix (Values 0
      and 1 are already defined by
      [I-D.ietf-ccamp-general-constraint-encode].

      MatrixID: matrix identifier, the scope of this integer number is
      shared with [I-D.ietf-ccamp-rwa-info].

      N: Node scope flags.  With this flag set there's no Link Set
      information but only a list of optical parameters TLVs that apply
      to the whole optical node.

      W: Wavelength Dependency Matrix [EDITOR NOTE: to evaluate vs a the
      flag at vector/parameter level.].

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   The usage of multiple matrixes with Connectivity type equal to 2
   (Impairment Matrix) MIGHT be used to grup optical parameters by
   connectivity.  For example, if subset of parameters apply to the
   whole node connectivity, a unique matrix with flag N=1 is used.  At
   the same some other subset of parameters apply only to some LinkSet
   pairs, a specific Impairment Matrix will be added.

3.  Acknowledgements

   TBD

4.  IANA Considerations

   This document does not contain any IANA request.

5.  Security Considerations

   All drafts are required to have a security considerations section.
   See RFC 3552 [RFC3552] for a guide.

6.  References

6.1.  Normative References

   [ITU.G680]
              International Telecommunications Union, "Physical transfer
              functions of optical network elements", ITU-
              T Recommendation G.680, July 2007.

   [ITU.G697]
              International Telecommunications Union, "Optical
              monitoring for dense wavelength division multiplexing
              systems", ITU-T Recommendation G.697, February 2012.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

6.2.  Informative References

   [I-D.ietf-ccamp-general-constraint-encode]
              Bernstein, G., Lee, Y., Li, D., and W. Imajuku, "General
              Network Element Constraint Encoding for GMPLS Controlled
              Networks", draft-ietf-ccamp-general-constraint-encode-08
              (work in progress), July 2012.

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   [I-D.ietf-ccamp-rwa-info]
              Lee, Y., Bernstein, G., Li, D., and W. Imajuku, "Routing
              and Wavelength Assignment Information Model for Wavelength
              Switched Optical Networks", draft-ietf-ccamp-rwa-info-14
              (work in progress), March 2012.

   [I-D.martinelli-ccamp-wson-iv-info]
              Martinelli, G., Kattan, M., Galimberti, G., and A.
              Zanardi, "Information Model for Wavelength Switched
              Optical Networks (WSON) with Optical Impairments
              Validation.", draft-martinelli-ccamp-wson-iv-info-00 (work
              in progress), July 2012.

   [I-D.narten-iana-considerations-rfc2434bis]
              Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs",
              draft-narten-iana-considerations-rfc2434bis-09 (work in
              progress), March 2008.

   [RFC3552]  Rescorla, E. and B. Korver, "Guidelines for Writing RFC
              Text on Security Considerations", BCP 72, RFC 3552,
              July 2003.

   [RFC6566]  Lee, Y., Bernstein, G., Li, D., and G. Martinelli, "A
              Framework for the Control of Wavelength Switched Optical
              Networks (WSONs) with Impairments", RFC 6566, March 2012.

Authors' Addresses

   Giovanni Martinelli (editor)
   Cisco
   via Philips 12
   Monza,   20900
   Italy

   Phone: +39 039 2092044
   Email: giomarti@cisco.com

   Moustafa Kattan
   Cisco
   DUBAI,   500321
   UNITED ARAB EMIRATES

   Phone:
   Email: mkattan@cisco.com

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   Gabriele M. Galimberti
   Cisco
   Via Philips,12
   Monza  20900
   Italy

   Phone: +39 039 2091462
   Email: ggalimbe@cisco.com

   Andrea Zanardi (editor)
   CREATE-NET
   via alla Cascata 56 C, Povo
   Trento  38100
   Italy

   Email: andrea.zanardi@create-net.org

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