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<p class="MsoNormal">Dear SLP WG,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Due to some issues that Ken Andrews and Massimo Bertinelli from the C&S WG have brought to my attention regarding the application of the CRC-32 in USLP with respect to the C&S sublayer coding recommendations, I have generated with the help
of Gian Paolo some proposed changes to the 732.1-B (USLP) Blue book related to the Frame Error Control Field (FECF). The idea behind these changes is to simply the interface between the C&S sublayer and the Protocol Sublayer<span style="color:black">. In essence,
</span><span style="color:black">USLP would only supply the CRC-16 for the FECF. The CRC-32 would only be supplied by the C&S sublayer when CCSDS 211.2 (Prox-1 Sync & CC) applies.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">These proposed changes are in the SLP WG CWE under:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt"><a href="https://tinyurl.com/yxc6s7xr">https://tinyurl.com/yxc6s7xr</a><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Please let me know if you have any comments on these changes. My intent is to bring these changes up for discussion at the Virtual CCSDS Fall meetings in late October in the SLP WG meetings. I would like to receive
your comments by Sept 24. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Greg<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Greg Kazz<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Principal Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Technical Group Supervisor,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">PSSE/EEISE/PPSE (312B)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Jet Propulsion Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">4800 Oak Grove Dr., M/S 301-490<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">Pasadena, CA 91109</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">1+(818)393 6529(voice)</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">1</span><span lang="ES-MX" style="font-size:11.0pt">+(818)393 6871(fax)</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">email: greg.j.kazz@jpl.nasa.gov
</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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