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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">"Kazz, Greg J (US 312B)" <greg.j.kazz@jpl.nasa.gov><br>
<b>Date: </b>Monday, October 26, 2020 at 10:44 AM<br>
<b>To: </b>Moury Gilles <Gilles.Moury@cnes.fr>, "sls-sdls@mailman.ccsds.org" <sls-sdls@mailman.ccsds.org><br>
<b>Cc: </b>"Kazz, Greg J (US 312B) via SLS-SLP" <sls-slp@mailman.ccsds.org><br>
<b>Subject: </b>Does SDLS apply to USLP truncated transfer frame ?<o:p></o:p></span></p>
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<p class="MsoNormal">Dear Gilles and SLDS WG,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">SLP WG has a question regarding the application of the SDLS protocol to truncated USLP Transfer Frames.<o:p></o:p></p>
<p class="MsoNormal">These truncated frames are envisioned for very short length telecommands or forward link Proximity-1 link commanding. This frame type provides backward compatibility with TC hardware commands or immediate commands. These commands are typically
2 octets long. We envision the truncated USLP frame length to be between 8 and 32 octets.
<o:p></o:p></p>
<p class="MsoNormal">The 8 octet case is for backward compatibility with short Telecommands. The 32 octet case is for the LDPC(512,256) codeblock case.<o:p></o:p></p>
<p class="MsoNormal">In that context, does it make sense for SDLS header and possibly SDLS trailer to apply to the USLP truncated frame.
<o:p></o:p></p>
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<p class="MsoNormal">The discussion of the proposed non-use of SDLS for truncated USLP frames is mentioned in Chapter 6, specifically in Section 6.3.2. The definition of the truncated USLP frame is in Annex G of the attached draft document<o:p></o:p></p>
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<p class="MsoNormal">SLS WG would like your opinion on this matter.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal">Greg Kazz<o:p></o:p></p>
<p class="MsoNormal">Chair SLP WG<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">SLS-SLP <sls-slp-bounces@mailman.ccsds.org> on behalf of Matthew Cosby <Matt.Cosby@Goonhilly.org><br>
<b>Date: </b>Monday, October 26, 2020 at 9:27 AM<br>
<b>To: </b>"sls-slp@mailman.ccsds.org" <sls-slp@mailman.ccsds.org><br>
<b>Subject: </b>[EXTERNAL] [Sls-slp] Updated Book</span><o:p></o:p></p>
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<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Here is the updated book from the working group today.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Regards, Matt.<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="mso-fareast-language:EN-GB">Matthew Cosby</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="mso-fareast-language:EN-GB">Chief Technology Officer
</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="mso-fareast-language:EN-GB">Goonhilly Earth Station Ltd</span></b><o:p></o:p></p>
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