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
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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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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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