Framework and Requirements for GMPLS based control of Flexi-grid DWDM networks
draft-ietf-ccamp-flexi-grid-fwk-02

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Last updated 2014-08-26
Replaces draft-ogrcetal-ccamp-flexi-grid-fwk
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Network Working Group                           O. Gonzalez de Dios, Ed.
Internet-Draft                                            Telefonica I+D
Intended status: Standards Track                        R. Casellas, Ed.
Expires: February 27, 2015                                          CTTC
                                                                F. Zhang
                                                                  Huawei
                                                                   X. Fu
                                                                     ZTE
                                                           D. Ceccarelli
                                                                Ericsson
                                                              I. Hussain
                                                                Infinera
                                                         August 26, 2014

 Framework and Requirements for GMPLS based control of Flexi-grid DWDM
                                networks
                   draft-ietf-ccamp-flexi-grid-fwk-02

Abstract

   This document defines a framework and the associated control plane
   requirements for the GMPLS based control of flexi-grid DWDM networks.
   To allow efficient allocation of optical spectral bandwidth for high
   bit-rate systems, the International Telecommunication Union
   Telecommunication Standardization Sector (ITU-T) has extended the
   recommendations [G.694.1] and [G.872] to include the concept of
   flexible grid.  A new DWDM grid has been developed within the ITU-T
   Study Group 15 by defining a set of nominal central frequencies,
   channel spacings and the concept of "frequency slot".  In such
   environment, a data plane connection is switched based on allocated,
   variable-sized frequency ranges within the optical spectrum.

Status of This Memo

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Gonzalez de Dios, et al.Expires February 27, 2015               [Page 1]
Internet-Draft         GMPLS Flexi-grid Framework            August 2014

   This Internet-Draft will expire on February 27, 2015.

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Table of Contents

   1.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Flexi-grid Networks . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Flexi-grid in the context of OTN  . . . . . . . . . . . .   4
     4.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
       4.2.1.  Frequency Slots . . . . . . . . . . . . . . . . . . .   5
       4.2.2.  Media Channels  . . . . . . . . . . . . . . . . . . .   7
       4.2.3.  Media Layer Elements  . . . . . . . . . . . . . . . .   7
       4.2.4.  Optical Tributary Signals . . . . . . . . . . . . . .   8
     4.3.  Flexi-grid layered network model  . . . . . . . . . . . .   8
       4.3.1.  Hierarchy in the Media Layer  . . . . . . . . . . . .   9
       4.3.2.  DWDM flexi-grid enabled network element models  . . .  10
   5.  GMPLS applicability . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  General considerations  . . . . . . . . . . . . . . . . .  11
     5.2.  Considerations on TE Links  . . . . . . . . . . . . . . .  11
     5.3.  Considerations on Labeled Switched Path (LSP) in Flexi-
           grid  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
     5.4.  Control Plane modeling of Network elements  . . . . . . .  18
     5.5.  Media Layer Resource Allocation considerations  . . . . .  19
     5.6.  Neighbor Discovery and Link Property Correlation  . . . .  23
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