Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks
RFC 7698
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Type |
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RFC - Informational
(November 2015; No errata)
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Last updated |
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2015-11-19
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Replaces |
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draft-ogrcetal-ccamp-flexi-grid-fwk
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Stream |
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IETF
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plain text
pdf
html
bibtex
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Matt Hartley
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Shepherd write-up |
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Show
(last changed 2015-07-09)
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| IESG |
IESG state |
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RFC 7698 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Deborah Brungard
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) O. Gonzalez de Dios, Ed.
Request for Comments: 7698 Telefonica I+D
Category: Informational R. Casellas, Ed.
ISSN: 2070-1721 CTTC
F. Zhang
Huawei
X. Fu
Stairnote
D. Ceccarelli
Ericsson
I. Hussain
Infinera
November 2015
Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks
Abstract
To allow efficient allocation of optical spectral bandwidth for
systems that have high bit-rates, the International Telecommunication
Union Telecommunication Standardization Sector (ITU-T) has extended
its Recommendations G.694.1 and G.872 to include a new Dense
Wavelength Division Multiplexing (DWDM) grid by defining a set of
nominal central frequencies, channel spacings, and the concept of the
"frequency slot". In such an environment, a data-plane connection is
switched based on allocated, variable-sized frequency ranges within
the optical spectrum, creating what is known as a flexible grid
(flexi-grid).
Given the specific characteristics of flexi-grid optical networks and
their associated technology, this document defines a framework and
the associated control-plane requirements for the application of the
existing GMPLS architecture and control-plane protocols to the
control of flexi-grid DWDM networks. The actual extensions to the
GMPLS protocols will be defined in companion documents.
Gonzalez de Dios, et al. Informational [Page 1]
RFC 7698 GMPLS Flexi-Grid Framework November 2015
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7698.
Copyright Notice
Copyright (c) 2015 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.
Gonzalez de Dios, et al. Informational [Page 2]
RFC 7698 GMPLS Flexi-Grid Framework November 2015
Table of Contents
1. Introduction ....................................................4
2. Terminology .....................................................5
2.1. Requirements Language ......................................5
2.2. Abbreviations ..............................................5
3. Overview of Flexi-Grid Networks .................................6
3.1. Flexi-Grid in the Context of OTN ...........................6
3.2. Flexi-Grid Terminology .....................................6
3.2.1. Frequency Slots .....................................7
3.2.2. Media-Layer Elements ................................9
3.2.3. Media Channels .....................................10
3.2.4. Optical Tributary Signals ..........................10
3.2.5. Composite Media Channels ...........................11
3.3. Hierarchy in the Media Layer ..............................11
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