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<p class="MsoNormal">I don’t like it, but I propose that the WG move forward with developing the book and you bring up the new-version vs. new-book issue to the CESG.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Reasons I don’t like the two-book solution:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">So now we’re maintaining two versions of LTP, which version are folks supposed to choose for missions going forward? They’ll choose the one with flight heritage, right?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">We’ll have to do the same thing with BPv7<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">There’s a version number in the header; receivers will know what was sent.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">The book as Silver is still reference-able. If folks have systems they’re building to the current (v1) book, they can switch to referencing the silver book.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Why don’t we do that with ALL CCSDS books, backward-compatible or not?<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">--keith<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Tomaso.deCola@dlr.de <Tomaso.deCola@dlr.de><br>
<b>Date: </b>Friday, October 8, 2021 at 4:19 AM<br>
<b>To: </b>marc.sanchez.net@jpl.nasa.gov <marc.sanchez.net@jpl.nasa.gov>, Dr. Keith L Scott <kscott@mitre.org><br>
<b>Cc: </b>sis-dtn@mailman.ccsds.org <sis-dtn@mailman.ccsds.org><br>
<b>Subject: </b>[EXT] RE: LTP vs LTPv2<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB">Then probably we should better keep two books, one with the “old LTP” for which we’ll do some pink sheets to fix some inconsistencies and another one (the new LTP). In such a away we could have two versions of LTP available,
similarly to IPv4 and IPv6 in IETF. Probably we may have to slightly change the title of the books (v1 and v2?) to have a clear demarcation between the two version of the protocols and avoid any ambiguity.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><a id="OWAAM96555CF48B764E5BAB1B13676ABD30FC" href="mailto:kscott@mitre.org"><span style="font-family:"Calibri",sans-serif;text-decoration:none">@Scott, Keith L.</span></a>:what do you think?<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">Tomaso<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> SIS-DTN <sis-dtn-bounces@mailman.ccsds.org> <b>
On Behalf Of </b>Sanchez Net, Marc (US 332H) via SIS-DTN<br>
<b>Sent:</b> Donnerstag, 7. Oktober 2021 00:21<br>
<b>To:</b> sis-dtn@mailman.ccsds.org<br>
<b>Subject:</b> [Sis-dtn] LTP vs LTPv2<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I had to leave today’s meeting early. Did we reach consensus on how to proceed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also, I will note that some colleagues at JPL (I have similar concerns) do not really like the idea of turning the current version of LTP into a silver book. The problem is that, by definition, a silver book implies that a protocol is deprecated
or obsolete, but several systems that are being built today use BPv6+LTP or BPv7+LTP and thus might be in operation for a long time. So, essentially, we are “telling” industry that they have developed an already obsolete standard?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">-----------------------------------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">Marc Sanchez Net<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:gray">Telecommunications Engineer</span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:gray">Jet Propulsion Laboratory<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:gray">Office:</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222"> </span><span style="color:black"><a href="tel:(818)%20393-5840" target="_blank"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#0070C0">(818)
354-1650</span></a></span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#0070C0">
</span><span style="font-size:10.0pt;color:gray">|</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#0070C0">
</span><span style="font-size:10.0pt;color:gray">Email:</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222"> </span><span style="color:black"><a href="mailto:marc.sanchez.net@jpl.nasa.gov"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue">marc.sanchez.net@jpl.nasa.gov</span></a></span><span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal">-----------------------------------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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