Liaison statement
WSON Impairment Work in CCAMP

Submission date 2009-09-16
From IETF CCAMP WG (Deborah Brungard)
To ITU-T SG15 Question 6, Question 12, and Question 14 (,,
Response contact
Technical contact
Purpose For action
Deadline 2009-10-30 Action Taken
Attachments (None)
The CCAMP Working Group of IETF thanks Question 12 for their liaison
from the September 2008 meeting informing of their initiation of work
to be done in cooperation with Question 6 on developing a network model
for WSON which will include optical impairments. We would like to
inform you of our progress in this area as documented in the CCAMP
document "A Framework for the Control of Wavelength Switched Optical
Networks (WSON) with Impairments":

This document provides a framework for GMPLS protocols and mechanisms
to support impairment aware routing and wavelength assignment. The
deployment scenarios are based on the categories discussed at Question
6's Sunnyvale meeting:

We would appreciate your consideration of this document in your work
and would you please inform us of the scope of your work and the
timelines. For CCAMP's impairment work, CCAMP is focused on scenarios
where approximated impairment estimation using ITU-T defined parameters
and approximation techniques (G.680) may be used. The objective of
CCAMP work is to distribute the information which is needed to allow
path computation and signaling of new paths. We would appreciate your
input on the parameter information which is needed to be distributed by
a control plane, to be used by either a node for internal path
computation or a Path Computation Element, and its properties, so as to
understand the control plane distribution requirements. In addition, we
would appreciate your perspective on control plane modeling and
implications with regard to ITU-T's G.872 OTN aspects e.g. OTN
multi-layers (OTS, OMS, OCh), regenerators, and o/e/o (OCh, OTU, ODU).

Best Regards,

Lou Berger and Deborah Brungard
IETF CCAMP Working Group Co-Chairs