Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs)
RFC 6163
Document | Type | RFC - Informational (April 2011; No errata) | |
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Authors | Wataru Imajuku , Young Lee , Greg Bernstein | ||
Last updated | 2018-12-20 | ||
Replaces | draft-ietf-ccamp-wavelength-switched-framework | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6163 (Informational) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Adrian Farrel | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) Y. Lee, Ed. Request for Comments: 6163 Huawei Category: Informational G. Bernstein, Ed. ISSN: 2070-1721 Grotto Networking W. Imajuku NTT April 2011 Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs) Abstract This document provides a framework for applying Generalized Multi- Protocol Label Switching (GMPLS) and the Path Computation Element (PCE) architecture to the control of Wavelength Switched Optical Networks (WSONs). In particular, it examines Routing and Wavelength Assignment (RWA) of optical paths. This document focuses on topological elements and path selection constraints that are common across different WSON environments; as such, it does not address optical impairments in any depth. 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/rfc6163. Lee, et al. Informational [Page 1] RFC 6163 Wavelength Switched Optical Networks April 2011 Copyright Notice Copyright (c) 2011 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. Table of Contents 1. Introduction ....................................................4 2. Terminology .....................................................5 3. Wavelength Switched Optical Networks ............................6 3.1. WDM and CWDM Links .........................................6 3.2. Optical Transmitters and Receivers .........................8 3.3. Optical Signals in WSONs ...................................9 3.3.1. Optical Tributary Signals ..........................10 3.3.2. WSON Signal Characteristics ........................10 3.4. ROADMs, OXCs, Splitters, Combiners, and FOADMs ............11 3.4.1. Reconfigurable Optical Add/Drop Multiplexers and OXCs ..............................11 3.4.2. Splitters ..........................................14 3.4.3. Combiners ..........................................15 3.4.4. Fixed Optical Add/Drop Multiplexers ................15 3.5. Electro-Optical Systems ...................................16 3.5.1. Regenerators .......................................16 3.5.2. OEO Switches .......................................19 3.6. Wavelength Converters .....................................19 3.6.1. Wavelength Converter Pool Modeling .................21 3.7. Characterizing Electro-Optical Network Elements ...........24 3.7.1. Input Constraints ..................................25 3.7.2. Output Constraints .................................25 3.7.3. Processing Capabilities ............................26 4. Routing and Wavelength Assignment and the Control Plane ........26 4.1. Architectural Approaches to RWA ...........................27 4.1.1. Combined RWA (R&WA) ................................27 4.1.2. Separated R and WA (R+WA) ..........................28 4.1.3. Routing and Distributed WA (R+DWA) .................28 4.2. Conveying Information Needed by RWA .......................29 Lee, et al. Informational [Page 2] RFC 6163 Wavelength Switched Optical Networks April 2011 5. Modeling Examples and Control Plane Use Cases ..................30Show full document text