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CCAMP                                                      G. Martinelli
Internet-Draft                                                 M. Kattan
Intended status: Standards Track                           G. Galimberti
Expires: January 31, 2013                                          Cisco
                                                              A. Zanardi
                                                              CREATE-NET
                                                           July 30, 2012


    Encoding for WSON Information Model with Impairments Validation.
                draft-martinelli-ccamp-wson-iv-encode-00

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 January 31, 2013.

Copyright Notice

   Copyright (c) 2012 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 Matrix . . . . . . . . . . . . . . . . . . . . . 4
   3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5
   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 [ID.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 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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           Type                |            Length             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   | ParamSource   |    ParamID    |             Reserved        |W|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                            Value                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                           Variance                            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Where the following parameters are defined:

      Type.  IANA defined for Optical Parameter TLV.

      Length.  The length (bytes) of this TLV including the header.

      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] has defined the following identifiers:



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         1.  Reserved

         2.  Reserved

         3.  Reserved

         4.  Reserved

         5.  OSNR

         6.  Q Factor

         7.  PMD

         8.  Residual Chromatic Dispersion

      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.

   In addition the following flags is defined:

      W. The parameter has a wavelength dependency

   [EDITOR NOTE: encoding to be refined.  In case of wavelength
   dependency the label set can be added within parameter definition.
   To evaluate vs. with impairment matrix flags ]

2.2.  Impairment Matrix

   As defined by the [ID.martinelli-ccamp-wson-iv-info] the Impairment
   Matrix follow the same structure as the Connectivity Matrix with some
   variations.
















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    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                         |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                    Optical Parameter TLV(s)                   |
   :                               :                               :
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Where:

      Connectivity: 2, Impairment Matrix.

      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
      flag at parameter level.]


3.  Acknowledgements

   TBD


4.  IANA Considerations

   This document reuse the ConnectivityMatrix object defined in
   [I-D.ietf-ccamp-general-constraint-encode].

   This document defines the Optical Parameter Object.


5.  Security Considerations

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




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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.

   [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.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.

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

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




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   [RFC6163]  Lee, Y., Bernstein, G., and W. Imajuku, "Framework for
              GMPLS and Path Computation Element (PCE) Control of
              Wavelength Switched Optical Networks (WSONs)", RFC 6163,
              April 2011.

   [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
   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


   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 C, Povo
   Trento  38100
   Italy

   Email: andrea.zanardi@create-net.org












































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