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<p class="MsoNormal"><span style="font-family:"Aptos",sans-serif;mso-fareast-language:EN-US">Hi Jorge,<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">Yes, we have the same scenario with some radio astronomy dishes and SPP (no COP obviously) is already working fine in this scenario (I am sure EPP would as well but
we are not using it operationally, yet). So, it would be really good to understand (at least for CCSDS) why SPP/EPP is not suitable or why BPTU is better (in whichever way) to justify specifying an alternative (at least for 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>
<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>
<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>Jorge Amodio via SIS-DTN<br>
<b>Sent:</b> 26 February 2025 16:20<br>
<b>To:</b> tomaso.decola <tomaso.decola@dlr.de>; sis-dtn@mailman.ccsds.org<br>
<b>Subject:</b> Re: [Sis-dtn] 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" style="font-family:"Aptos",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif">Good Morning,
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif">As I expressed on the IETF DTN WG list, I’d very much like to see this moving forward since it fits one of the real use case scenarios today where we use
astronomy dishes that only “listen”<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif">Thanks & Regards<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",sans-serif">Jorge<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Aptos",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">From:</span></b><span lang="EN-US"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Tomaso de Cola via SIS-DTN<br>
<b>Sent:</b> Wednesday, February 26, 2025 7:14 AM<br>
<b>To:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><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"><span lang="EN-US"><o:p> </o:p></span></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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