[Moims-sc] Space Packet binding

Wed Mar 18 20:52:44 UTC 2015

Hi Mario, et al,

I've looked over your proposed dispositions.  Thanks for getting them back promptly.  Several of them are now marked green, accepted.  A few are marked yellow, discussion still needed.  A few are marked red, and hese are where I think we have some remaining issues.  For most of these I have suggested a way forward.  Please take a look and see how many we can close via email.

If we cannot get it done in that way I will try and find time to meet with you during the meetings next week.

Best regards, Peter

From: Mario Merri <Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>>
Date: Wednesday, March 18, 2015 at 9:05 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>
Cc: MOIMS-SC MOIMS-SC <moims-sc at mailman.ccsds.org<mailto:moims-sc at mailman.ccsds.org>>, Nestor Peccia <Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>>, Tom Gannett <tomg at aiaa.org<mailto:tomg at aiaa.org>>
Subject: Re: [Moims-sc] Space Packet binding

Dear Peter,

David has gone through your comments and has proposed dispositions in the attached files. Most of your points have been accepted. 6 points have been labelled "to be discussed" and have either a question or a comment associated.

I would appreciate if you could go through the proposed dispositions, preferably before the Pasadena meeting, so that we could earmark some time there to go through any remaining issue face-to-face. Unfortunately, David will not attend the meeting: nevertheless we could arrange a splinter SM&C team who could meet with you and David (over a WebEx) to discuss. For logistic reasons this would be best in the (early) morning. Could you please identify in your agenda a slot for this next week?

Many thanks

__Mario

From:        "Shames, Peter M (312B)" <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>
To:        "Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>" <Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>>,
Cc:        "brigitte.behal at cnes.fr<mailto:brigitte.behal at cnes.fr>" <brigitte.behal at cnes.fr<mailto:brigitte.behal at cnes.fr>>, "danford.s.smith at nasa.gov<mailto:danford.s.smith at nasa.gov>" <danford.s.smith at nasa.gov<mailto:danford.s.smith at nasa.gov>>, "erwann.poupart at cnes.fr<mailto:erwann.poupart at cnes.fr>" <erwann.poupart at cnes.fr<mailto:erwann.poupart at cnes.fr>>, "Mehran.Sarkarati at esa.int<mailto:Mehran.Sarkarati at esa.int>" <Mehran.Sarkarati at esa.int<mailto:Mehran.Sarkarati at esa.int>>, "Michael.Wendler at dlr.de<mailto:Michael.Wendler at dlr.de>" <Michael.Wendler at dlr.de<mailto:Michael.Wendler at dlr.de>>, "roger.thompson at scisys.co.uk<mailto:roger.thompson at scisys.co.uk>" <roger.thompson at scisys.co.uk<mailto:roger.thompson at scisys.co.uk>>, "Sam.Cooper at scisys.co.uk<mailto:Sam.Cooper at scisys.co.uk>" <Sam.Cooper at scisys.co.uk<mailto:Sam.Cooper at scisys.co.uk>>, "Stefan.Gaertner at dlr.de<mailto:Stefan.Gaertner at dlr.de>" <Stefan.Gaertner at dlr.de<mailto:Stefan.Gaertner at dlr.de>>, David Feliot <david.feliot at scalagent.com<mailto:david.feliot at scalagent.com>>
Date:        16/03/2015 16:04
Subject:        Re: [Moims-sc] Space Packet binding
________________________________

Dear Mario,

Sorry you are having problems with this.  The document is attached again here.   It appears that there was some problem with how I saved the doc, but I had a second copy with all of the comments intact (see screen shot of the first such comment).

Please ask me if anything is unclear.

Regards, Peter

From: Mario Merri <Mario.Merri at esa.int<mailto:Mario.Merri at esa.int>>
Date: Monday, March 16, 2015 at 7:53 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>
Cc: Brigitte Behal <Brigitte.Behal at cnes.fr<mailto:Brigitte.Behal at cnes.fr>>, Dan Smith <danford.s.smith at nasa.gov<mailto:danford.s.smith at nasa.gov>>, "erwann.poupart at cnes.fr<mailto:erwann.poupart at cnes.fr>" <erwann.poupart at cnes.fr<mailto:erwann.poupart at cnes.fr>>, "Mehran.Sarkarati at esa.int<mailto:Mehran.Sarkarati at esa.int>" <Mehran.Sarkarati at esa.int<mailto:Mehran.Sarkarati at esa.int>>, "Michael.Wendler at dlr.de<mailto:Michael.Wendler at dlr.de>" <Michael.Wendler at dlr.de<mailto:Michael.Wendler at dlr.de>>, Roger Thompson <Roger.Thompson at scisys.co.uk<mailto:Roger.Thompson at scisys.co.uk>>, "Sam.Cooper at scisys.co.uk<mailto:Sam.Cooper at scisys.co.uk>" <Sam.Cooper at scisys.co.uk<mailto:Sam.Cooper at scisys.co.uk>>, "Stefan.Gaertner at dlr.de<mailto:Stefan.Gaertner at dlr.de>" <Stefan.Gaertner at dlr.de<mailto:Stefan.Gaertner at dlr.de>>, David Feliot <david.feliot at scalagent.com<mailto:david.feliot at scalagent.com>>
Subject: Re: [Moims-sc] Space Packet binding

Dear Peter,

we have tried to access your comments, but unfortunately the pdf does not include any comment, despite it shows comment-holders. The commented YB is instead OK. Could you please resend the pdf to this distribution list?

Many thanks,

__Mario

----- Forwarded by Mario Merri/esoc/ESA on 16/03/2015 14:54 -----

From:        Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>
To:        moims-sc at mailman.ccsds.org<mailto:moims-sc at mailman.ccsds.org>,
Date:        16/03/2015 13:36
Subject:        [Moims-sc] Space Packet binding
Sent by:        moims-sc-bounces at mailman.ccsds.org<mailto:moims-sc-bounces at mailman.ccsds.org>
________________________________

from P. Shames

SEA AD
[cid:_1_0CBD58F80CBD56B800586B32C1257E0C]       Shames Peter<http://public.ccsds.org/sites/cwe/cesg/polls/_layouts/1033/UserDisp.aspx?ID=400>

        APPROVE WITH CONDITIONS (state conditions that must be satisfied)       http://public.ccsds.org/sites/cwe/cesg/polls/Shared%20Documents/524x1b0_CESG_Approval-SEA.pdf

http://public.ccsds.org/sites/cwe/cesg/polls/Shared%20Documents/MO%20SPP%20Prototype%20Test%20Report-v1-0-ps.doc

This document is vastly improved beyond the original and does a credible job of providing a rather complete binding from the MAL abstract data types and message formats to a concrete set of data types and SPP compliant message formats.

There are, however, still a few loose ends that need to be tied down in order to ensure interoperability. They are flagged in the document and listed here:

1) The "mapping configuration parameter" set (Sec 2.4.2 & Annex B) is a major element in interoperability, but it is listed as a "managed parameter" handled by some unspecified out of band agreement. Absent a way to acquire this key document interoperability is impossible.

2) There are several issues in the text that must be corrected, such as stating that the APID Qualifier, an integer field, is to include a "/" character, the use of Packet Type" does not align with SPP defined usage, the handling of security / authentication.

3) The handling of retransmission is left to "lower layers", but many CCSDS space link protocol deployments do not include such features. Is reliability, particularly of commanding, to be left to "lower layers", i.e. "bottom up" or is it a requirement applied by MO operations, top down?

4) The test report appears to be quite thorough, but one key element required for interoperability, that pesky "mapping configuration parameter" set, is not even mentioned. Also, the details of the test configuration leave a lot to the imagination and it is not clear how anyone other than those involved in the test could insert their own MAL / SPP component and test it out. See notes on test report for more details.

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