[CESG] Your remark on SLS: [EXTERNAL] CESG Meeting on 25 Oct . - Draft MoM

Shames, Peter M (US 312B) peter.m.shames at jpl.nasa.gov
Fri Nov 15 17:53:43 UTC 2019


´╗┐Dear Gippo,

The reason for including the CESG in this email discussion was not to "SPAM" them, that would waste their time.  Rather it was to make sure that they are a part of the discussion because they should be.  You must be aware that whatever fiddling you decide to do with the GFP at the SDLP to coding and synchronization interface also affects directly the CSS Area, for their SLE & CSTS service specs, Functional Resource (FR) model, Service Management, and architecture documents.  This is not just some SLS internal issue.  And, because these effects cross Area boundaries it is a concern for SEA as well.  It is in our charter to attend to such matters.  This is the same sort of consideration that has brought attention on some of the less than well thought out proposals from the Optical Com WG, like using Ethernet frames as space data link protocols.  I would expect you to welcome such support and not to castigate it.

Perhaps the issue with the wording of that sentence is just a matter of your use of English.  Perhaps what you meant to say was this:

However, introducing the Generic Framing Procedure entails matters affecting the communications architecture stack, especially the code & synch protocols and their interface to space data link protocols.

Lastly, I do want to remind you that even though this issue is technically within the SLS Area that it has ramifications well outside the area.  I think that you should expect continued interest and attention to this and to the Optical WG.  Unlike your continued attention to matters occurring inside the CFDP WG, this is actually within the scope of SEA and is a direct concern of CSS.

Best regards, Peter


From: Gian Paolo Calzolari <Gian.Paolo.Calzolari at esa.int>
Date: Thursday, November 14, 2019 at 3:11 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov>
Cc: CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org>, Gilles Moury <Gilles.Moury at cnes.fr>, "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>
Subject: Re: Your remark on SLS: [CESG] [EXTERNAL] CESG Meeting on 25 Oct . - Draft MoM

Peter,
        first of all I fail understanding how spamming the rest of CESG can help our discussion, but never mind.
Second, Margherita's sentence you comment does not state that SLP protocols need to be changed bur it rather puts accent on the impact on the "architecture stack".
Nobody in SLS Area Plenary meeting as well as (two) CESG Meetings mentioned adding data types or anything else to Space Data Link Protocols.

Moreover, I do not "invite the whole of SLS WG into this discussion" and this is NOT what I "wish to do".
Gilles and I simply reported the result of the discussion in the SLS Plenary.

Having said this, despite I think Margherita correctly captured the substance of the SLS reporting,  the only correction I think would be acceptable to that sentence is the following:
However, introducing the Generic Framing Procedure entails matters affecting architecture stack, code & synch, protocols.

That's all on my side and will not comment further on this as the ball is now in the field of (some) SLS WGs for proper discussion.

Regards

Gian Paolo




From:        "Shames, Peter M (US 312B)" <peter.m.shames at jpl.nasa.gov>
To:        "Gian.Paolo.Calzolari at esa.int" <Gian.Paolo.Calzolari at esa.int>
Cc:        "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>, "Gilles Moury" <Gilles.Moury at cnes.fr>, "CCSDS Engineering Steering Group - CESG Exec" <cesg at mailman.ccsds.org>
Date:        12-11-19 19:16
Subject:        Re: Your remark on SLS: [CESG] [EXTERNAL]  CESG Meeting on 25 Oct . - Draft MoM
________________________________


Gippo,



What is stated in inaccurate by any measure since GFP does not have anything to say about space data link protocols.  The only relationship that could possibly exist in the future would be to add another data type (or four) to the link layer protocols that GFP would formally recognize.  This requires no changes to those protocols, which is, in fact, a feature of GFP.



I'm not suggesting that you should not invite the whole of SLS WG into this discussion is that is what you wish to do.  I am asking that we all not make statements that are confusing and inaccurate.  The whole purpose of sending out the MoM and asking for feedback is to avoid such issues.



Regards, Peter





From: Gian Paolo Calzolari <Gian.Paolo.Calzolari at esa.int>
Date: Tuesday, November 12, 2019 at 2:50 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov>
Cc: "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>, Gilles Moury <Gilles.Moury at cnes.fr>
Subject: Your remark on SLS: [CESG] [EXTERNAL] CESG Meeting on 25 Oct . - Draft MoM



Peter,
       with respect to your comment in the attached snapshot, I propose to do NO update to the MoMs also to avoid another useless saga on updates to updates to updates.
The natter will be properly discussed in SLS and this is the important message conveyed by the MoMs

Regards

Gian Paolo


[cid:image001.gif at 01D59B9A.8F996000]




From:        "Shames, Peter M\(US 312B\) via CESG" <cesg at mailman.ccsds.org>
To:        "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>, "cesg at mailman.ccsds.org" <cesg at mailman.ccsds.org>
Date:        11-11-19 20:09
Subject:        Re: [CESG] [EXTERNAL]  CESG Meeting on 25 Oct . - Draft MoM
Sent by:        "CESG" <cesg-bounces at mailman.ccsds.org>

________________________________


[attachment "d 0.1 CESG-Fall 19 Minutes of Meeting_ DRAFT-SEA.docx" deleted by Gian Paolo Calzolari/esoc/ESA]

Hi Margherita,

I had a few minutes free and have provided my feedback early, for a change.

Cheers, Peter


From: CESG <cesg-bounces at mailman.ccsds.org> on behalf of "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>
Date: Monday, November 11, 2019 at 8:12 AM
To: CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org>
Subject: [EXTERNAL] [CESG] CESG Meeting on 25 Oct . - Draft MoM

Dear All,
please find attached the draft Minute of Meeting of CESG Meeting on 25th October at ESOC.
Let me have your comments by 20th November.
If you edit the MoM, please use track changes.

Kind regards
Margherita




--------------------------------------------------------------
Margherita di Giulio
Ground Station Systems Division
Backend Software Section (OPS-GSB)


European Space Agency ESA/ESOC
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