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Information Encoding for WSON with Impairments Validation
draft-martinelli-ccamp-wson-iv-encode-03

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CCAMP                                                 G. Martinelli, Ed.
Internet-Draft                                                     Cisco
Intended status: Standards Track                        D. Siracusa, Ed.
Expires: August 16, 2014                                      CREATE-NET
                                                           X. Zhang, Ed.
                                                     Huawei Technologies
                                                           G. Galimberti
                                                                   Cisco
                                                              A. Zanardi
                                                              CREATE-NET
                                                       February 12, 2014

       Information Encoding for WSON with Impairments Validation
                draft-martinelli-ccamp-wson-iv-encode-03

Abstract

   Impairment-Aware (IA) Routing and Wavelength Assignment (RWA)
   function might be required in Wavelength Switched Optical Networks
   (WSON) that already support RWA.  This document defines proper
   encoding to support this operation.  It goes in addition to the
   available impairment-free 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
   can be used 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 16, 2014.

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Copyright Notice

   Copyright (c) 2014 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
   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Encoding  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Optical Parameter . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Impairment Vector . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Impairment Matrix . . . . . . . . . . . . . . . . . . . .   5
     2.4.  Resource Block Information  . . . . . . . . . . . . . . .   6
   3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Contributing Authors  . . . . . . . . . . . . . . . . . . . .   7
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   In case of WSON where optical impairments play a significant role,
   the framework document [RFC6566] defines related control plane
   architectural options for Impairment Aware Routing and Wavelength
   Assignment (IA-RWA).  This document provides a suitable encoding for
   the related WSON impairment information model as 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.

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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|V|      Reserved             |  ParamSource  |    ParamID    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                            Value                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                      Variance (Optional)                      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   The following flag is defined:

      S. Standard bit.
      S=1 indentifies a set of parameters standardized by ITU; while S=0
      identifies a non-standardized set of parameters.

      V. Variance bit.
      V=0 only parameter value, V=1 parameter value and variance.

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

      ParamSource.  Where this parameter is 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:

         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)

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         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], it 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 have a
   wavelength dependency information.

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0|       Reserved              |   Number of Parameters        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Optical Param sub-TLV(s)                     |
   :                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Where:

      W = 0.  Wavelength Dependency flag.  There is no wavelength
      dependency.

      Number of Parameters contained in this vector.

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

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1|       Reserved              |   Number of Parameters        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Label Set                                    |
   :                                                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Optical Param sub-TLV(s)                     |
   :                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

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   Where:

      W = 1.  Wavelength Dependency flag.  There is wavelength
      dependency.

      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.

2.3.  Impairment Matrix

   As defined by the [I-D.martinelli-ccamp-wson-iv-info], the impairment
   matrix follows 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        |0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Link Set A #1                         |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Link Set B #1                         |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                Impairment Vector sub-TLV(s)                   |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |       Additional Link Set pairs and Impairment Vector(s)      |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

    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        |1|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                Impairment Vector sub-TLV(s)                   |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   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].

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

      N: Node scope flag.  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.

   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 a subset of parameters apply to the
   whole node, a unique matrix with flag N=1 is used.  At the same some
   another subset of parameters applies only to some LinkSet pairs, a
   specific Impairment Matrix will be added.

2.4.  Resource Block Information

   As defined by [I-D.martinelli-ccamp-wson-iv-info], the concept of
   resource block is extended to support the description of the
   impairments related to that block.  The encoding follows the same
   structure as the one defined in [I-D.ietf-ccamp-rwa-wson-encode],
   with the addition of an optional Impairment Vector sub-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
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                     RB Set Field                              |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |I|O|                         Reserved                          |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                Optical Interface Class List(s) (opt)          |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |               Acceptable Client Signal Type (opt)             |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                    Input Bit Rate List (opt)                  |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                Processing Capabilities List (opt)             |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                   OIV-Impairment Vector (opt)                 |
       :                                                               :
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   The Impairment Vector is defined within Section 2.2.  All the other
   fields are defined within [I-D.ietf-ccamp-rwa-wson-encode].

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3.  Acknowledgements

   TBD

4.  Contributing Authors

   This document was the collective work of several authors.  The text
   and content of this document was contributed by the editors and the
   co-authors listed below (the contact information for the editors
   appears in appropriate section and is not repeated below):

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   Moustafa Kattan
   Cisco
   DUBAI,   500321
   UNITED ARAB EMIRATES

   Email: mkattan@cisco.com

   Young Lee
   Huawei
   1700 Alma Drive, Suite 100
   Plano, TX  75075
   USA

   Phone: +1 972 509 5599 x2240
   Fax:   +1 469 229 5397
   Email: ylee@huawei.com

   Fatai Zhang
   Huawei
   F3-5-B R&D Center, Huawei Base
   Bantian, Longgang District
   P.R. China

   Phone: +86-755-28972912
   Email: zhangfatai@huawei.com

   Federico Pederzolli
   CREATE-NET
   via alla Cascata 56/D, Povo
   Trento  38123
   Italy

   Email: federico.pederzolli@create-net.org

5.  IANA Considerations

   This document does not contain any IANA request.

6.  Security Considerations

   This document defines an protocol-neutral encoding for an information
   model describing impairments in optical networks and it does not
   introduce any security issues.  If such a encoding is put into use

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   within a network it will by its nature contain details of the
   physical characteristics of an optical network.  Such information
   would need to be protected from intentional or unintentional
   disclosure.

7.  References

7.1.  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.

7.2.  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-13
              (work in progress), November 2013.

   [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-19
              (work in progress), November 2013.

   [I-D.ietf-ccamp-rwa-wson-encode]
              Bernstein, G., Lee, Y., Li, D., and W. Imajuku, "Routing
              and Wavelength Assignment Information Encoding for
              Wavelength Switched Optical Networks", draft-ietf-ccamp-
              rwa-wson-encode-23 (work in progress), November 2013.

   [I-D.martinelli-ccamp-wson-iv-info]
              Martinelli, G., Zhang, X., Galimberti, G., Zanardi, A.,
              and D. Siracusa, "Information Model for Wavelength
              Switched Optical Networks (WSONs) with Impairments
              Validation", draft-martinelli-ccamp-wson-iv-info-03 (work
              in progress), February 2014.

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   [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

   Domenico Siracusa (editor)
   CREATE-NET
   via alla Cascata 56/D, Povo
   Trento  38123
   Italy

   Email: domenico.siracusa@create-net.org

   Xian Zhang (editor)
   Huawei Technologies
   F3-5-B R&D Center, Huawei Base
   Bantian, Longgang District
   Shenzen  518129
   P.R. China

   Phone: +86 755 28972913
   Email: zhang.xian@huawei.com

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

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

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   Andrea Zanardi
   CREATE-NET
   via alla Cascata 56/D, Povo
   Trento  38123
   Italy

   Email: andrea.zanardi@create-net.org

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