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Liaison Statement: Response to your ITU-T SG15 OTNT Standardization Work Plan

Submission Date: 2008-09-06
From: IETF CCAMP WG (Adrian Farrel)
To: ITU-T SG 15 (Greg Jones)
Cc:Hiroshi Ohta
Yoichi Maeda
Stephen Trowbridge
Ross Callon
David Ward
Scott Bradner
CCAMP Working Group
Response Contact: Adrian Farrel
Deborah Brungard
Technical Contact: Adrian Farrel
Deborah Brungard
Purpose: In response
Attachments: (none)
Body:
The CCAMP working group of the IETF thanks ITU-T SG15 for sharing their
"Optical Transport Networks & Technologies Standardization Work Plan"
in a liaison dated February 29th, 2008.

We have no specific comments on the plan, but would like to draw your
attention to work currently in progress within CCAMP to extend the
GMPLS control plane for use in Wavelength Switched Optical Networks
(WSONs).

We have three working group drafts related to this topic as follows:

Framework for GMPLS and PCE Control of Wavelength Switched Optical
Networks (WSON)
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-wavelength-switched-framework-00.txt

Generalized Labels for G.694 Lambda-Switching Capable Label Switching
Routers
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-gmpls-g-694-lambda-labels-02.txt

Routing and Wavelength Assignment Information Model for Wavelength
Switched Optical Networks 
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-rwa-info-00.txt


At the moment, CCAMP has decided to split the effort into two parts:
1. Work on the Routing Wavelength Assignment (RWA) problem
2. Work on optical-impairment-based networking

At the moment effort is only being expended on the first of these, with
the problems of handling optical impairments being deferred for future
work. Please note that, at such a time that CCAMP does work with
optical impairments, it is not our intention to define impairments, but
we will defer to the ITU-T on this.

Lastly, it has been observed in the course of our work that the
modeling of asymmetric switches such as ROADMs may be an area that the
ITU-T would like to work on.

Best regards,
Adrian Farrel and Deborah Brungard
IETF CCAMP Working Group Co-Chairs