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
Martinelli, et al. Expires August 27, 2013 [Page 1]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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
Martinelli, et al. Expires August 27, 2013 [Page 2]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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:
Martinelli, et al. Expires August 27, 2013 [Page 3]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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].
Martinelli, et al. Expires August 27, 2013 [Page 4]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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.].
Martinelli, et al. Expires August 27, 2013 [Page 5]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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.
Martinelli, et al. Expires August 27, 2013 [Page 6]
Internet-Draft Encoding WSON Info Model with Impairments February 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-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
Martinelli, et al. Expires August 27, 2013 [Page 7]
Internet-Draft Encoding WSON Info Model with Impairments February 2013
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
Martinelli, et al. Expires August 27, 2013 [Page 8]