Link Management Protocol Extensions for Grid Property Negotiation
draft-li-ccamp-grid-property-lmp-00

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Network Working Group                                              Y. Li
Internet-Draft                                                       ZTE
Intended status: Standards Track                        January 21, 2012
Expires: July 24, 2012

   Link Management Protocol Extensions for Grid Property Negotiation
                  draft-li-ccamp-grid-property-lmp-00

Abstract

   The recent updated version of ITU-T [G.694.1] has introduced the
   flexible grid DWDM technique which provides a new tool that operators
   can implement to provide a higher degree of network optimization than
   is possible with fixed grid systems.  This document describes the
   extensions to the Link management protocol (LMP) to negotiate link
   grid property between the adjacent DWDM nodes before the link is
   brought up.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on July 24, 2012.

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   Copyright (c) 2012 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
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   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Li                        Expires July 24, 2012                 [Page 1]
Internet-Draft            LMP for grid property             January 2012

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Problem statement  . . . . . . . . . . . . . . . . . . . . . .  3
     3.1.  Flexi-fixed Grid Nodes Interworking  . . . . . . . . . . .  3
     3.2.  Flexible Grid Capability Negotiation . . . . . . . . . . .  4
   4.  LMP extensions . . . . . . . . . . . . . . . . . . . . . . . .  5
     4.1.  Grid Property Subobject  . . . . . . . . . . . . . . . . .  5
   5.  Messages Exchange Procedure  . . . . . . . . . . . . . . . . .  7
     5.1.  Flexi-fixed Grid Nodes Messages Exchange . . . . . . . . .  7
     5.2.  Flexible Nodes Messages Exchange . . . . . . . . . . . . .  8
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     8.1.  Normative references . . . . . . . . . . . . . . . . . . .  9
     8.2.  Informative References . . . . . . . . . . . . . . . . . .  9
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10

Li                        Expires July 24, 2012                 [Page 2]
Internet-Draft            LMP for grid property             January 2012

1.  Introduction

   The recent updated version of ITU-T [G.694.1] has introduced the
   flexible grid DWDM technique which provides a new tool that operators
   can implement to provide a higher degree of network optimization than
   is possible with fixed grid systems.  Flexible grid network is
   composed of arbitrarily assigned spectral slots.  That is the
   adjacent channel spacing and spectral bandwidth per wavelength are
   variable.  Mixed bitrate transmission systems can allocate their
   channels with different spectral bandwidths so that they can be
   optimized for the bandwidth requirements of the particular bitrate
   and modulation scheme of the individual channels.  This technique is
   regarded to be a promising way to improve the network utilization
   efficiency and fundamentally reduce the cost of the core network.

   While during the practical deployment procedure, the fixed grid
   optical nodes will be replaced by the flexible nodes gradually.  This
   will lead to the problem of interworking between fixed grid DWDM and
   flexible grid DWDM nodes.  Besides, even two flexible grid optical
   nodes may have different grid properties, leading to link property
   conflict.  Therefore, this document describes the extensions to the
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