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Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks (RFC7698) Disclosure Number: IPCOM000245054D
Original Publication Date: 2015-Nov-01
Included in the Prior Art Database: 2016-Feb-07
Document File: 84 page(s) / 90K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

O. Gonzalez de Dios: AUTHOR [+7]


The term "flexible grid" ("flexi-grid" for short), as defined by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) Study Group 15 in the latest version of [G.694.1], refers to the updated set of nominal central frequencies (a frequency grid), channel spacing, and optical spectrum management and allocation considerations that have been defined in order to allow an efficient and flexible allocation and configuration of optical spectral bandwidth for systems that have high bit-rates.

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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


   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...