[CESG] The history of NASA input for AOS (and USLP) upink in 131.0-B

[Gian.Paolo.Calzolari at esa.int]

Dear All,
        as it is under discussion in these days, I want to recall 
everybody the history of NASA input for AOS (and USLP) upink in 131.0-B as 
based on SLS Reports to CESG and on C&S WG MoMs.

Long time ago at Fall 2017 Meetings [1] it was discovered (thanks to NASA) 
that the original aim of 131.0-B allowing TM Codes also for uplink was 
somehow "lost in translation"
It started a long discussion in the C&C with a basic question: As the 
original TM Coding specs only included Convolutional and RS Codes (with 
their concatenation) is then reason to open completely the door to any 
code allowed for uplink?
Different agencies had different points of view in the WG and indeed the 
discussion was long as painful.

In Spring 2018 there was no input on the matter [2]

In Fall 2018 the matter was discussed again and working group consensus 
was that modifications including book name changes should be made in 
parallel to 131.0-B, 131.2-B, and 131.3-B" despite on a very lively 
discussion with different interpretations [3] and finally <the working 
group agreed to the text, “Prepare a concept paper to 1) rename, remove 
link directions and protocols from TM C&S Blue Book, 2) same with SCCC, 3) 
same with DVB-S2, 4) prepare Profiles Blue Book to enumerate 
combinations”.>. 

In Spring 2019, finally "Consensus on the concept paper was formally 
recorded with WG resolution to submit it to CMC approval to initiate the 
work required to implement this update in CCSDS 131.0-B."
Very quickly it was issued a resolution to Start of CWE Project for CCSDS 
131.0 “TM Synchronization and Channel Coding” Blue Book Issue 4 [5] and 
related CWE Project approved [6]. However no NASA input was provided after 
this approved resolution.

In Fall 2019 there was no NASA input to the WG [7]

Best regards

Gian Paolo

-----------------------------
List of References

[1] C&S MoMs Fall 2017 The Hague, section 2.5 and AI_17_04 (NASA) and 
eventual SLS Area Report stating for C&S: Agreement to open a new working 
item (Magenta Book?) to identify which coding options out of CCSDS 
131.0-B-3 can be made applicable to uplink AOS
[2]  C&S MoMs Spring 2018 Gaithersburg,  AI_17_04 rescheduled to Fall 2018
[3] C&S MoMs Fall 2018 Berlin, sections 1.8 and 2.1 and AI_17_04 (NASA) 
Closed; superseded by AI_18_16 and eventual SLS Area Report stating for 
C&S: Agreed way forward for “AOS Uplink with concepts paper to be 
submitted soon 
[4] C&S MoMs Spring 2019 Berlin, sections 2.4 and AI_18_16 (NASA) still 
open.
[5] Resolution SLS-R-2019-05-006 dated 9 May 2019.
[6] Poll CMC-P-2019-12-002 closed on 31 Dec. 2019
[7]  C&S MoMs Fall 2019 Darmstadt and  SLS Area Report stating for the 
related project "No progress in this meeting - Target: Oct 2020"

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or
protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received
this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect
personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ccsds.org/pipermail/cesg/attachments/20200221/3a77f9a5/attachment.htm>