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<td width=53 style="border-style:solid;border-color:#000000;border-width:0px 0px 0px 0px;padding:0px 0px;"><a href="http://public.ccsds.org/sites/cwe/cesg/polls/_layouts/1033/UserDisp.aspx?ID=400"><font size=3 color=blue><u>Shames
Peter</u></font></a></table>
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WITH CONDITIONS (state conditions that must be satisfied)</font>
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</u></font><a href="http://public.ccsds.org/sites/cwe/cesg/polls/Shared%20Documents/MO%20SPP%20Prototype%20Test%20Report-v1-0-ps.doc"><font size=3 color=blue><u>http://public.ccsds.org/sites/cwe/cesg/polls/Shared%20Documents/MO%20SPP%20Prototype%20Test%20Report-v1-0-ps.doc</u></font></a><font size=3>
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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. <br>
<br>
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: <br>
<br>
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.
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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. <br>
<br>
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? <br>
<br>
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.</font></table>
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