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
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 16, 2014.
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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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