Subject: [CCAMP] Proposed Liason text for WSON IV drafts

From: "Giovanni Martinelli (giomarti)" <[email-masked]>
Date: Thu, 5 Nov 2015 09:34:42 +0000

Dear Chairs / all,

please find here below a long awaited proposed liason text  for  WSON OI activity. 
Pls feel free to comment  and/or propose text according to wg best needs.

Cheers
Giovanni & Xian

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The CCAMP working group of the IETF would like to draft the attention of Q6/SG15 to the undergoing work on providing an informational model and encode to facilitate control of impair-aware WDM networks [1] [2]. 

Section 3 of document [1] lists a set of optical parameters that might be useful for assessing linear impairments during the path computational phase executed in the control plane with a DWDM data plane. Limitations of this approach are well understood by IETF and outlined in Section 1 thanks to your contributions during joint meeting CCAMP/Q6 hold in Orlando on March 15, 2013 and through liaison document "LS/r on CCAMP Liaison to ITU-T SG15 Q6 and Q12 on WSON” on November 1st 2013. Do you think the list matches the input provided through your liaison statement? 

Section 2.1 of document [2] defines the parameter representation (i.e. encoding) that should be used within IETF GMPLS control plane protocols.. IETF will really appreciate your input on the following questions:
- Each parameter is encoded through two 32 bits floating-point values: the value and the variance. Do you think this will suffice?
- This draft encodes the ITU G.697 Section V.2 "Parameter ID Source" and Section V.3 "Parameter ID". According to the parameter list defined in [1[, there is a need to encode more parameters than those available in G.697 Appendix V.  Which option is more appropriate to reflect this? 
 -Option A:  keep the same "Parameter ID Source" value (currently only value 1 is defined) and to generate a new parameter IDs?
 -Option B:  generate a new "Parameter ID Source"?

[1] https://datatracker.ietf.org/doc/draft-ietf-ccamp-wson-iv-info/
[2] https://datatracker.ietf.org/doc/draft-martinelli-ccamp-wson-iv-encode/. 

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