Liaison statement
WSON work in Q12/15

State Posted
Submitted Date 2008-10-06
From Group ITU-T-SG-15
From Contact Greg Jones
To Group ccamp
To Contacts
Response Contact
Technical Contact
Purpose For information
Attachments WSON work in Q12/15 - body text in pdf
Thank you for your liaison statement of September 6, 2008 to Q3/15 regarding
the OTN work plan advising us of your work on Wavelength Switched Optical
Networks (WSON). Q.12/15 has initiated work on developing a network model for
WSON, we will be working in cooperation with Q.6/15 to include optical
impairments in this model.  One intended output of this work is a model that
can be used for path computation in the presence of both optical impairments
and blocking switches.  We note that the aspects related to optical impairments
are quite challenging and we are engaging the appropriate experts.  In view of
this we would encourage you to continue your focus on networks in which
impairments can be neglected and only wavelength assignment needs to be
considered. We noted that you are considering the use of a matrix to represent
the blocking characteristics of an asymmetrical switch (e.g. ROADM).  We are
considering the use of a bipartite graph since it appears to be suitable for
path computation. We will review the internet drafts that you reference and
would be obliged if you kept us informed of your progress on work in this area.
An electronic copy of this liaison statement is available at: