<div dir="ltr">I think the intent is to provide an API that would work for a variety of underlying carriage (IP, UDP, TCP, LTP, ...???)<div>v</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 11, 2024 at 9:40 AM Deaton, Joshua E. (MSFC-HP27)[MOSSI2] <<a href="mailto:joshua.e.deaton@nasa.gov">joshua.e.deaton@nasa.gov</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-8481737243595970467">
<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="m_-8481737243595970467WordSection1">
<p class="MsoNormal">Just to make sure I am following correctly; the current suggestion is to create a POSIX (BSD) Socket Specification for BP where we are putting BP directly on top of IP without TCP/UDP or are we trying to fully displace IP all the way down
and so BP replaces IP at layer 3.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Sincerely,<u></u><u></u></p>
<p class="MsoNormal">Joshua Deaton<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>> <b>
On Behalf Of </b>sburleig.sb--- via SIS-DTN<br>
<b>Sent:</b> Monday, March 11, 2024 9:22 AM<br>
<b>To:</b> Mayer, Jeremy P. (JSC-OT/ESA)[EUROPEAN SPACE AGENCY] <<a href="mailto:jeremy.mayer@dlr.de" target="_blank">jeremy.mayer@dlr.de</a>>; <a href="mailto:Felix.Flentge@esa.int" target="_blank">Felix.Flentge@esa.int</a>; <a href="mailto:vint@google.com" target="_blank">vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> [EXTERNAL] [BULK] Re: [Sis-dtn] BP Sockets [was RE: IP networking within DTN-based protocol architectures]<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
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</span><span style="font-size:10pt;color:black">This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.</span><span style="color:black">
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<p class="MsoNormal" style="margin-bottom:12pt"><br>
<br>
<u></u><u></u></p>
<div>
<p class="MsoNormal"><span style="font-family:Aptos,sans-serif">Right, the service interface in the CCSDS BP specification -- like all service specifications -- is abstract; it defines the properties of a BP API for the purpose of explaining the required
behavior of a Bundle Protocol Agent. Any number of existing and future BP implementations with very different APIs can be wholly conformant to that specification. But a BP sockets specification would enable any application that currently communicates over
POSIX (BSD) sockets to use BP instead of UDP without extensive code changes; the syntax is already in place. That’s the compelling advantage of the idea.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:Aptos,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-family:Aptos,sans-serif">Scott<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:Aptos,sans-serif"><u></u> <u></u></span></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> <a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a> <<a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a>>
<br>
<b>Sent:</b> Monday, March 11, 2024 3:48 AM<br>
<b>To:</b> <a href="mailto:Felix.Flentge@esa.int" target="_blank">Felix.Flentge@esa.int</a>; <a href="mailto:sburleig.sb@gmail.com" target="_blank">
sburleig.sb@gmail.com</a>; <a href="mailto:vint@google.com" target="_blank">vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: BP Sockets [was RE: [Sis-dtn] IP networking within DTN-based protocol architectures]<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="EN-GB">Hi,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">In the abstract, I’d say so, but (let’s be honest) many developers tend to ignore the abstract notion of the service interface and prefer to have a tangible set of API operations.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Jeremy<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> Felix Flentge <<a href="mailto:Felix.Flentge@esa.int" target="_blank">Felix.Flentge@esa.int</a>>
<br>
<b>Sent:</b> Montag, 11. März 2024 11:46<br>
<b>To:</b> <a href="mailto:sburleig.sb@gmail.com" target="_blank">sburleig.sb@gmail.com</a>; Mayer, Jeremy <<a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a>>;
<a href="mailto:vint@google.com" target="_blank">vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> BP Sockets [was RE: [Sis-dtn] IP networking within DTN-based protocol architectures]<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><span lang="DE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Hi,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">I like the idea but isn’t this already covered (partially) by the CCSSDS BP service interface, eg:<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="DE" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="DE">Bind – register EID in passive state<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Listen – </span><span lang="DE">register EID in active state</span><span lang="EN-GB"><u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Connect – sets a default destination for future send.request<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Send – send.request <u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Recv – poll.request<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Felix<u></u><u></u></span></p>
</div>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-left:0.5in"><b>From:</b> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>sburleig.sb--- via SIS-DTN<br>
<b>Sent:</b> Saturday, March 9, 2024 6:56 PM<br>
<b>To:</b> <a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a>; <a href="mailto:vint@google.com" target="_blank">
vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-family:Aptos,sans-serif">Thanks for that analysis, Jeremy. We’ve been talking about at least since STINT several years ago, and I really think it’s an idea whose time has come.<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-family:Aptos,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-family:Aptos,sans-serif">Scott<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span style="font-family:Aptos,sans-serif"><u></u> <u></u></span></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-left:0.5in"><b>From:</b> <a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">
Jeremy.Mayer@dlr.de</a> <<a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a>>
<br>
<b>Sent:</b> Saturday, March 9, 2024 8:01 AM<br>
<b>To:</b> <a href="mailto:vint@google.com" target="_blank">vint@google.com</a>; <a href="mailto:sburleig.sb@gmail.com" target="_blank">
sburleig.sb@gmail.com</a><br>
<b>Cc:</b> <a href="mailto:Tomaso.deCola@dlr.de" target="_blank">Tomaso.deCola@dlr.de</a>; <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">
sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: [Sis-dtn] IP networking within DTN-based protocol architectures<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB">Hi,<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB">That’s a fair point. Generally, I’d say that BP-POSIX could work with the following:<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Bind – works: sets source EID.<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Listen – works; sets source EID and opens reception.
<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Connect – UDP style, sets default destination address.<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Send – only valid for connected bundlesocks.
<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Sendto/sendmsg – works.<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Recv – works.<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Recvfrom/recvmsg – works, probably should support “wildcard” EIDs, at least for services.
<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Getaddrinfo and friends – not required<u></u><u></u></span></p>
<p class="m_-8481737243595970467MsoListParagraph" style="margin-left:1in">
<u></u><span lang="EN-GB" style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-GB">Select – Works, highly implementation dependent.<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB">BSD sockets really do work for everything!<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB">Jeremy<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="EN-GB"><u></u> <u></u></span></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-left:0.5in"><b>From:</b> Vint Cerf <<a href="mailto:vint@google.com" target="_blank">vint@google.com</a>>
<br>
<b>Sent:</b> Samstag, 9. März 2024 16:51<br>
<b>To:</b> Scott Burleigh <<a href="mailto:sburleig.sb@gmail.com" target="_blank">sburleig.sb@gmail.com</a>><br>
<b>Cc:</b> Mayer, Jeremy <<a href="mailto:Jeremy.Mayer@dlr.de" target="_blank">Jeremy.Mayer@dlr.de</a>>; de Cola, Tomaso <<a href="mailto:Tomaso.deCola@dlr.de" target="_blank">Tomaso.deCola@dlr.de</a>>; Dr. Keith L Scott via SIS-DTN <<a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a>><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<u></u><u></u></p>
</div>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="DE"><u></u> <u></u></span></p>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="DE">Yes generally speaking<u></u><u></u></span></p>
</div>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="DE"><u></u> <u></u></span></p>
<div>
<div>
<p class="MsoNormal" style="margin-left:0.5in"><span lang="DE">On Sat, Mar 9, 2024, 10:43 <<a href="mailto:sburleig.sb@gmail.com" target="_blank">sburleig.sb@gmail.com</a>> wrote:<u></u><u></u></span></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<div>
<p class="MsoNormal" style="margin-left:0.5in">
<span style="font-family:Aptos,sans-serif">I think we get closer to BSD/POSIX if we use UDP as a model. The attenuated UDP notion of connect() would work for BP, I think.</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span style="font-family:Aptos,sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span style="font-family:Aptos,sans-serif">Scott</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span style="font-family:Aptos,sans-serif"> </span><u></u><u></u></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-left:0.5in">
<b>From:</b> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Jeremy Mayer via SIS-DTN<br>
<b>Sent:</b> Saturday, March 9, 2024 12:35 AM<br>
<b>To:</b> <a href="mailto:vint@google.com" target="_blank">vint@google.com</a>; <a href="mailto:Tomaso.deCola@dlr.de" target="_blank">
Tomaso.deCola@dlr.de</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:0.5in">
<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">Hi,</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">I’m tempted to agree. I’ve seen limited utility in IP->BP encap, as (other than some unidirectional UDP-based applications), the assumptions made in IP networks (especially TCP) do not scale well to DTN environments. The two largest issues
I see are:</span><u></u><u></u></p>
<p class="m_-8481737243595970467m-2940071027920571956msolistparagraph" style="margin-left:1in">
<u></u><span>A.<span style="font:7pt "Times New Roman"">
</span></span><u></u><span lang="EN-GB">The assumption that relatively low-latency and bidirectional communication is available.</span><u></u><u></u></p>
<p class="m_-8481737243595970467m-2940071027920571956msolistparagraph" style="margin-left:1in">
<u></u><span>B.<span style="font:7pt "Times New Roman"">
</span></span><u></u><span lang="EN-GB">The layering of stream and message-based semantics.</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB"> </span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">Almost every TCP-ish application which I’ve seen run over BP winds up with exceptionally low performance, unless some sort of PEP is integrated, which adds complexity, failure points, and fragility.
</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB"> </span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">+1 for the notion of a standard API though, with the additional caveat that we should standardize nomenclature across implementations. We could likely reuse about 80% of the BSD/POSIX interface for BP, with the notable exception of connect.</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB"> </span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">Thanks,</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB">Jeremy</span><u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">
<span lang="EN-GB"> </span><u></u><u></u></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal" style="margin-left:0.5in">
<b>From:</b> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Vint Cerf via SIS-DTN<br>
<b>Sent:</b> Freitag, 8. März 2024 12:31<br>
<b>To:</b> de Cola, Tomaso <<a href="mailto:Tomaso.deCola@dlr.de" target="_blank">Tomaso.deCola@dlr.de</a>><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<u></u><u></u></p>
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<span lang="DE">The more I think about this, the less I like trying to manage off-Earth IP networks remotely. I think I would much rather see native applications running over BP. In any case we need to develop standard APIs for BP, such as the Sockets interface
for Linux/Unix/Posix. </span><u></u><u></u></p>
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<span lang="DE">We do need to figure out how IP-based and BP-based applications interwork. What do Domain Names mean in the BP context for example. </span><u></u><u></u></p>
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<span lang="DE"> </span><u></u><u></u></p>
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<span lang="DE">v</span><u></u><u></u></p>
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<span lang="DE"> </span><u></u><u></u></p>
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<span lang="DE">On Fri, Mar 8, 2024 at 4:24 AM Tomaso de Cola via SIS-DTN <<a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a>> wrote:</span><u></u><u></u></p>
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<span lang="DE">Dear All,</span><u></u><u></u></p>
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<span lang="DE"> </span><u></u><u></u></p>
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as mentioned yesterday during our DTN weekly, during the past Fall meeting a presentation was given by University of Nanjing with the support of Chinese agency about IP-networking within DTN-based protocol stacks, especially for planetary network segments (i.e.
what is often referred to as IP-islands). <u></u><u></u></p>
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The link to that presentation is as follows:<u></u><u></u></p>
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<u></u><u></u></p>
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<a href="https://cwe.ccsds.org/sis/docs/SIS-DTN/Meeting%20Materials/2023/Fall%202023%20SIS-DTN/Possible%20BOF%20Discussion.pptx?d=w44d31f0b3be649e4bf24ec4ae50479a1" target="_blank">https://cwe.ccsds.org/sis/docs/SIS-DTN/Meeting%20Materials/2023/Fall%202023%20SIS-DTN/Possible%20BOF%20Discussion.pptx?d=w44d31f0b3be649e4bf24ec4ae50479a1</a><u></u><u></u></p>
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The proposal made there was for a BOF (i.e. towards a WG formation), which I see however too premature. On the contrary, I’d be more in favour for a SIG (Special Interest Group), happening outside the DTN WG.<u></u><u></u></p>
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<u></u><u></u></p>
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As discussed yesterday, key points to clarify/agree are:<u></u><u></u></p>
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<u></u><span>1.<span style="font:7pt "Times New Roman"">
</span></span><u></u>Is the proposal sound and meaningful to be addressed?<u></u><u></u></p>
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<u></u><span>2.<span style="font:7pt "Times New Roman"">
</span></span><u></u>Is appropriate for the SIS area or should be better addressed at architectural level in SEA (maybe it can be even a cross-area initiative)?<u></u><u></u></p>
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<u></u><span>3.<span style="font:7pt "Times New Roman"">
</span></span><u></u>In the case of SIS, is there significant support to start this? In other words, which agencies have interest in contributing to this activity?<u></u><u></u></p>
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<u></u><u></u></p>
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Thank you for sharing comments/objections/suggestions.<u></u><u></u></p>
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<u></u><u></u></p>
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Have a nice weekend,<u></u><u></u></p>
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<u></u><u></u></p>
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Tomaso<u></u><u></u></p>
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<span lang="DE" style="font-size:10pt;font-family:Arial,sans-serif;color:dimgray">————————————————————————</span><span lang="DE" style="font-size:12pt;font-family:"Times New Roman",serif">
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<b><span lang="IT" style="font-size:10pt;font-family:Arial,sans-serif;color:dimgray">Tomaso de Cola, Ph.D.</span></b><span lang="IT" style="color:rgb(31,73,125)"> |
</span><b><span lang="IT" style="font-size:10pt;font-family:Arial,sans-serif;color:dimgray">Integrated Satellite Systems (INS) Team Leader<br>
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</span><span style="color:rgb(31,73,125)"><a href="mailto:sandro.scalise@dlr.de" target="_blank"><span lang="DE" style="font-size:10pt;font-family:Arial,sans-serif">tomaso.decola@dlr.de</span></a></span><span lang="DE" style="color:rgb(31,73,125)">
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</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"><a href="http://www.dlr.de/kn/institut/abteilungen/san" target="_blank"><span lang="DE">http://www.dlr.de/kn/institut/abteilungen/san</span></a></span><span style="color:rgb(31,73,125)">
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<span lang="DE">_______________________________________________<br>
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<span class="m_-8481737243595970467m-2940071027920571956gmailsignatureprefix"><span lang="DE">-- </span>
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<span lang="DE">Vint Cerf</span><u></u><u></u></p>
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<span lang="DE">Google, LLC</span><u></u><u></u></p>
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<span lang="DE">until further notice</span><u></u><u></u></p>
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