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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Brian,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I have discussed with Yanik (who may still not have access to the CCSDS mailinglist...) and he came up with the following proposal:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In terms of wording, I think it would be clearer to keep the definition for<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">the Bundle Sequence Range as is and modify the definition for the Bundle Sequence instead.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I.e., we could append an “or a CBOR uint” to describe the Bundle Sequence Range (field).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This could e.g., look like:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Bundle Sequence Range – A Bundle Sequence Range as defined in 3.3.2 below
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt;text-indent:36.0pt"><span lang="EN-US"> or
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:108.0pt"><span lang="EN-US"> A CBOR unsigned integer if there is only a single sequence to be included, representing the length of that sequence<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:108.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I suppose, put in CDDL, this could then look like this instead:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq = [<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> seq-id: uint / eid,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> seq-start: uint,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> range: seq-range
<span style="background:yellow;mso-highlight:yellow">/ seq-incl-len</span>,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> ? blk-source: eid<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-range = [ seq-incl-len, + ( seq-excl-len, seq-incl-len) ]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-incl-len = uint .gt 0 ; inclusive length<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-excl-len = uint .gt 0 ; exclusive length<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="mso-ligatures:none">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Felix<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none"> Sipos, Brian J. <Brian.Sipos@jhuapl.edu>
<br>
<b>Sent:</b> 15 May 2025 15:09<br>
<b>To:</b> Felix Flentge <Felix.Flentge@esa.int>; sis-dtn@mailman.ccsds.org<br>
<b>Cc:</b> Juan A. Fraire <juan.fraire@inria.fr>; Alice Le Bihan <alice.le-bihan@insa-lyon.fr>; Jeck, Yanik <yanik.jeck@cgi.com>; Kramp, Paul-Niklas <paul-niklas.kramp@cgi.com><br>
<b>Subject:</b> RE: New Draft: COMPRESSED CUSTODY SIGNALING AND BUNDLE STATUS REPORTING<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Felix,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Thanks for consideration of my earlier suggestion. I think the definition of Bundle Sequence Range in Sec 3.3 is consistent and understandable.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">There is one possible compression, saving one byte, in the case where the array would have a single uint item it can be substituted with the uint itself.
It doesn’t affect the information model being encoded, but does add a small coding / decoding overhead to apply the compression. So it’s completely optional if you think there is that much value in one byte. (This compressed form would also degenerate to your
earlier form of start + length if there are no excluded intervals)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Put in CDDL, the `seq-range` would include the following (with rule `eid` taken from RFC 9171 appendix)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq = [<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> seq-id: uint / eid,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> seq-start: uint,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> seq-range,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> ? blk-source: eid<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-range = [ seq-incl-len, + ( seq-excl-len, seq-incl-len) ]
<span style="background:yellow;mso-highlight:yellow">/ seq-incl-len</span><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-incl-len = uint .gt 0 ; inclusive length<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">seq-excl-len = uint .gt 0 ; exclusive length<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Felix Flentge via SIS-DTN<br>
<b>Sent:</b> Wednesday, May 14, 2025 9:11 AM<br>
<b>To:</b> Dr. Keith L Scott via SIS-DTN <<a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a>><br>
<b>Cc:</b> Juan A. Fraire <<a href="mailto:juan.fraire@inria.fr">juan.fraire@inria.fr</a>>; Alice Le Bihan <<a href="mailto:alice.le-bihan@insa-lyon.fr">alice.le-bihan@insa-lyon.fr</a>>; Jeck, Yanik <<a href="mailto:yanik.jeck@cgi.com">yanik.jeck@cgi.com</a>>;
Kramp, Paul-Niklas <<a href="mailto:paul-niklas.kramp@cgi.com">paul-niklas.kramp@cgi.com</a>><br>
<b>Subject:</b> [EXT] [Sis-dtn] New Draft: COMPRESSED CUSTODY SIGNALING AND BUNDLE STATUS REPORTING<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt">Hi,<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">I have just uploaded Draft H of the ‘Compressed Custody Signaling And Bundle Status Reporting’ Orange Book to CWE:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><a href="https://spacecomm.sharepoint.com/:w:/r/sites/SIS/_layouts/15/Doc.aspx?sourcedoc=%7B10790F7B-6318-4BD0-9D53-8813C83BE941%7D&file=CompressedBundleStatusReportingAndCustodySignaling_OrangeBook_Draft_H.docx&action=default&mobileredirect=true"><span class="MsoSmartlink">CompressedBundleStatusReportingAndCustodySignaling_OrangeBook_Draft_H.docx</span></a><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">We have introduced the following changes:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Based on Brian’s proposal to make the reporting even more efficient, Yanik analysed and designed a new way to encode bundle sequences which may contain some gaps (see updated Section 3.3). It is not so easy to come up with some concise
language for that, so please let us know if you have suggestions for improvement.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I took the opportunity to not allow processing of the CREB/CTEB blocks in fragments:<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:108.0pt;text-indent:-36.0pt;mso-list:l0 level3 lfo6">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">3.4.1<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Extension Blocks specified in this specification shall only be added and processed in non-fragmented bundles.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:72.0pt">
<span lang="EN-US">NOTE – As later fragmentation of bundles using the extension blocks specified in this specification may lead to unintended effects such as loss of expected reporting or custody signals as fragmented bundles are never re-assembled (RfC 9171
does only specify Application Data Unit Re-Assembly), it is recommended to set the ‘Bundle Must Not be Fragmented’ flag at the source if the application of custody transfer or compressed status reporting according to this specification is intended.
</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The compressed reporting signal (see 5.2.3) has been changed to include the reporting reason code as integer (and not as an integer interpreted as bit field). Please note that the Status Report Request Flags (5.1.4.1) shall actually
be processed as a bit field. However, we align the Bit Number with the reason code integer for consistency.
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="mso-ligatures:none">Regards,<o:p></o:p></span></p>
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