[Css-csts] functional resource priority lsit

[Holger.Dreihahn at esa.int]

Hello John,
Thanks for the updated list. I fully agree to leave out USLP for the 
'first tier priority FRs'. I think this is in line with the practical 
adoption of USLP. USLP will be adopted, but until we have the practical 
need to monitor USLP parameters of a mission, it might still be a while. 
At least from all I can see.

Best regards,
Holger

Holger Dreihahn
European Spacecraft Operations Centre | European Space Agency | S-431
+49 6151 90 2233 | http://www.esa.int/esoc



From:   "John Pietras" <john.pietras at gst.com>
To:     "CCSDS_CSTSWG (css-csts at mailman.ccsds.org)" 
<css-csts at mailman.ccsds.org>, "Wolfgang Hell" <wo_._he at t-online.de>
Date:   05/08/2019 21:57
Subject:        [Css-csts] functional resource priority lsit
Sent by:        "CSS-CSTS" <css-csts-bounces at mailman.ccsds.org>



CSTSWG colleagues ---
Last month the CSS Area concurred to create separate functional resource 
sets for AOS, TC, and Unified space data link protocols in both the 
forward and return direction. This will result in the following changes to 
the baseline set of FRs:
-          A new Forward USLP FR Set (the lower layers of this are already 
in the FR Reference Model Tech Note);
-          Splitting the current Return TM/AOS SDLP Reception FR Set into 
separate Return TM SDLP Reception and Return AOS SDLP Reception FR Sets; 
and
-          Adding a new Return USLP Reception FR Set.
 
At the spring Workshop, the WG updated the priority list for which FRs 
would be targeted for inclusion in the end-of-year “drop” for the SANA 
Registry. That list contains no USLP FRs (in part because at the time we 
thought that USLP was going to be folded into the AOS, TC, and TM FR 
Sets). Should the FRs of the USLP FR Sets be added to the end-of-year 
list? This might be difficult, not only because of time and resource 
constraints, but because Wolfgang and I have discovered several 
ambiguities (and even possible errors) in the USLP specification, and it 
might be better to wait until those issues are resolved before we commit 
to a representation in the SANA Registry.
 
Whatever happens regarding USLP, I propose that the split into return TM 
and AOS FR Sets be included in the end-of-year drop, since the combined FR 
Set has been included in the earlier priority list. Wolfgang has already 
done a lot of work on this and so I think it will largely be a matter of 
making 2 copies of the existing FR Set and down-scoping the two sets to 
the specific SDLPs. I can also be available to do some of this tailoring 
(e.g., for the AOS set).
 
I have attached a strawman update of the priority list that reflects these 
changes. As before, the color-coding uses green to indicate that the FR is 
in the end-of-year drop. I have color-coded the USLP FRs  orange to 
indicate that the WG has not yet determined their status with respect to 
the year-end drop.
 
I look forward to your comments.
 
Best regards,
John[attachment "fr_work_table-2019-08-05-strawman.xlsx" deleted by Holger 
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