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<p class="MsoNormal"><span style="font-size:10.0pt">Greetings,<br>
<br>
I have a comment/question regarding unbounded file transfers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">CCSDS 727.0-B-5 says in Table 5-1: Fixed PDU Header Fields<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt">… All files of unbounded size shall be flagged ‘large’…<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt">If the sender can ensure the unbounded file being transferred will be of size < 4GB, why must the sender/receiver use FSS size 64 bits for all PDUs?<br>
<br>
Disadvantages:<o:p></o:p></span></p>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1;text-autospace:none">
<span style="font-size:10.0pt">each FDU 32 bits larger;<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1;text-autospace:none">
<span style="font-size:10.0pt">NAK sequence nearly doubles in size;<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1;text-autospace:none">
<span style="font-size:10.0pt">hardware/software built for 32 bit FSS cannot use unbounded file transfers<o:p></o:p></span></li></ul>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt"><br>
I am not seeing advantages that cannot be addressed without this constraint.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt"><br>
Any thoughts or explanation?<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt">thank you<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt">bob<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">--<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Bob Wiegand<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Ground Software Systems Branch<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">NASA/GSFC Code 583<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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