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<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;mso-fareast-language:EN-US">The obvious question for me would be how this compares to our current solutions (ie, space and encapsulation packets). In particular, I see some disadvantages of the
proposed approach with padding as it seems we could not have several bundles in a single frame (maybe not a real issue with relatively small frames). Maybe we should invite Rick also to present and discuss with CCSDS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif">Felix<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;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">From:</span></b><span lang="EN-US"> SIS-DTN <sis-dtn-bounces@mailman.ccsds.org>
<b>On Behalf Of </b>Tomaso de Cola via SIS-DTN<br>
<b>Sent:</b> 26 February 2025 14:14<br>
<b>To:</b> sis-dtn@mailman.ccsds.org<br>
<b>Subject:</b> [Sis-dtn] FW: Bundle Transfer Protocol - Unidirectional<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">Fyi<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US">This is something Rick had already inform me and Bob some weeks ago when we did the monthly CCSDS/IETF alignment on DTN activities.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US">Tomaso<o:p></o:p></span></p>
<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"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Rick Taylor <<a href="mailto:rick@tropicalstormsoftware.com">rick@tropicalstormsoftware.com</a>>
<br>
<b>Sent:</b> Mittwoch, 26. Februar 2025 14:11<br>
<b>To:</b> <a href="mailto:dtn@ietf.org">dtn@ietf.org</a>; 'Robert C Durst' (<a href="mailto:durst@mitre.org">durst@mitre.org</a>) <<a href="mailto:durst@mitre.org">durst@mitre.org</a>><br>
<b>Subject:</b> [dtn] Bundle Transfer Protocol - Unidirectional<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>
<p class="MsoNormal" style="margin-left:36.0pt">Hi All,<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">Just to let you all know I have recently published a personal draft: Bundle Transfer Protocol – Unidirectional.
<a href="https://datatracker.ietf.org/doc/draft-taylor-dtn-btpu/">https://datatracker.ietf.org/doc/draft-taylor-dtn-btpu/</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">The intent is to provide a minimal, efficient wire protocol for transferring Bundles over unidirectional, unreliable frame-based link-layer protocols, such as AOS, TM, 5G PDU and Ethernet.
<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’m following it up with a related draft covering how to add FEC to BTPU, for cases when selective FEC is useful, and a simple BTPU-over-Ethernet draft, which might be handy in some scenarios.<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">Also, I would be particularly interested in collaborating with anyone who can help draft a good specification for BTPU over the CCSDS data-frame protocols.<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 hope to find time in our packed WG agenda at IETF-112 to discuss it a bit more.<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">Many thanks,<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Rick<o:p></o:p></p>
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