[Css-csts] SLE Issues: open questions

[Wolfgang.Hell at esa.int]

Dear Alan,

Given your input, I stand corrected. There is at least one case where the
provider-initiated BIND option will be used. It is certainly not a problem to
retain that option - we just tried not to invest effort into improving the
specification of a feature that is not used by anybody.

Given that so far this feature had not been used, I'm sure that the WG would
be very interested in learning why the JPSS program has chosen this option.
Could you perhaps provide information on the the rational for this design
decision?

Best regards,

Wolfgang Hell


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  |Alan Jeffries <alan at jetsi.com>                                                                                                                        |
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  |Martin Karch <martin.karch at telespazio-vega.de>, "css-csts at mailman.ccsds.org" <css-csts at mailman.ccsds.org>                                             |
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  |11/03/2013 14:20                                                                                                                                      |
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  |Re: [Css-csts] SLE Issues: open questions                                                                                                             |
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  |css-csts-bounces at mailman.ccsds.org                                                                                                                    |
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Dear CSTS Group,

I normally do not chime in, but I am working on the JPSS weather satellite
program and we are migrating our T&C and high rate science links to SLE. As
part of this we are moving to provider initiated binds, so we would be
interested in keeping the concept as an option.

May I inquire as to why these were considered for removal.

Best regards, Alan Jeffries


On 3/11/13 3:38 AM, "Martin Karch" <martin.karch at telespazio-vega.de> wrote:


      Dear Working Group members,

      We have started to prepare the Pink Sheets for the SLE Books based on
      the problems reported by Wolfgang in his presentation on SLE issues
      during our meeting in Cleveland (see
      http://cwe.ccsds.org/css/docs/CSS-CSTS/CWE%20Private/SLE%20Services/SLE%20Issues.ppt
       <
      http://cwe.ccsds.org/css/docs/CSS-CSTS/CWE%20Private/SLE%20Services/SLE%20Issues.ppt
      >  in the CWE).

      There are the following 2 open points for clarification:

      - removal of the provider initiated BIND from the return services:
        Do we remove provider initiated BIND or do we keep it?

      - how to deal with not yet 'initialised' gettable parameters when the
      ASN.1 as is does not allow the parameter to be set to NULL. (See page
      26 on SLE Issues presentation).
      We think the cleanest solution would be to implement an ASN.1 change
      introducing a value qualifier. The more pragmatic (less invasive)
      approach would be the use of specific values to flag not yet
      initialized parameters. The decision on this shall be made by the WG.

      May I ask you to send me your opinions/decisions on these 2 points
      above not later than 15.03.2013.

      Many thanks in advance!

      Best regards,
      Martin

      ----------------------------
      Martin Karch
      Telespazio VEGA Deutschland GmbH
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------------------------------------------
Alan Jeffries
Jeffries Technology Solutions, Inc
VA Office: +1 703 471 7588
JPSS Office: +1 240 684 0982
Cell: +1 703 582 0228
E-Mail: alan at jetsi.com
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