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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Felix,<o:p></o:p></span></p><p class=MsoNormal><span 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><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span 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><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span 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><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>seq = [<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'> seq-id: uint / eid,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'> seq-start: uint,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'> seq-range,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'> ? blk-source: eid<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>]<o:p></o:p></span></p><p class=MsoNormal><span 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><span style='font-family:"Calibri",sans-serif'>seq-incl-len = uint .gt 0 ; inclusive length<o:p></o:p></span></p><p class=MsoNormal><span 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='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-family:"Calibri",sans-serif;mso-ligatures:none'>From:</span></b><span style='font-family:"Calibri",sans-serif;mso-ligatures:none'> SIS-DTN <sis-dtn-bounces@mailman.ccsds.org> <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 <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> [EXT] [Sis-dtn] New Draft: COMPRESSED CUSTODY SIGNALING AND BUNDLE STATUS REPORTING<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id=APLWarningText><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 align=left><tr><td width="100%" style='width:100.0%;background:#E0E0E0;padding:0in 0in 0in 0in'><p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><b><span style='font-family:"Calibri",sans-serif;color:red;mso-ligatures:none'>APL external email warning: </span></b><span style='font-family:"Calibri",sans-serif;color:black;mso-ligatures:none'>Verify sender <a href="mailto:sis-dtn-bounces@mailman.ccsds.org">sis-dtn-bounces@mailman.ccsds.org</a> before clicking links or attachments</span><span style='font-family:"Calibri",sans-serif;mso-ligatures:none'><o:p></o:p></span></p></td></tr></table><p><span lang=EN-GB> <o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-GB>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I have just uploaded Draft H of the ‘Compressed Custody Signaling And Bundle Status Reporting’ Orange Book to CWE:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><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></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>We have introduced the following changes:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><ol style='margin-top:0in' start=1 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l3 level1 lfo3'><span lang=EN-GB>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></span></li></ol><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><ol style='margin-top:0in' start=2 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l3 level1 lfo3'><span lang=EN-GB>I took the opportunity to not allow processing of the CREB/CTEB blocks in fragments:<o:p></o:p></span></li></ol><p class=MsoListParagraph style='margin-left:1.0in;text-indent:-.5in;mso-list:l0 level3 lfo6'><![if !supportLists]><span style='mso-list:Ignore'>3.4.1<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Extension Blocks specified in this specification shall only be added and processed in non-fragmented bundles.<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in'>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 lang=EN-GB><o:p></o:p></span></p><ol style='margin-top:0in' start=3 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l3 level1 lfo3'><span lang=EN-GB>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></span></li></ol><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-ligatures:none;mso-fareast-language:EN-GB'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-ligatures:none;mso-fareast-language:EN-GB'>Felix<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Calibri",sans-serif;mso-ligatures:none'>This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (<a href="mailto:dpo@esa.int">dpo@esa.int</a>). <o:p></o:p></span></p></div></div></body></html>