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<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">Hi, Felix.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">Thanks for the hard work. I just have some minor comments to bring similarities of writing across all UT layers.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">O SPP UT Layer – on page 3-2<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">3.3 SPACE PACKET PROTOCOL UT LAYER<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(comment) is there any potential needs for aggregation in this UT layer? If so, we can add it.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">O BP UT Layer - on page 3-5<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"> 3.4.4   A CFDP UNITDATA.request shall generate a Send.request where:<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:20.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">The application data unit shall <u>be</u> an aggregation of CFDP PDU according to 3.1.4<o:p></o:p></span></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(comment) to “ ~ shall

<b><u>be able to contain</u></b> an aggregation of CFDP PDU ~” because original sentence can be interpreted as only aggregated CFDP PDUs are allowed in BP UT layer<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(suggestion) change “shall contain” to “shall be able to contain” through whole contents to avoid

 mandating of the aggregation CFDP PDUs as only allowable option<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">O LTP UT Layer - on page 3-6 ~ 3.7<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:10.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">Red-part bytes is the part of the client service data which has been sent reliably; for CFDP this will be the

<u>complete client data</u><o:p></o:p></span></span></p>

<p class="MsoNormal" style="text-indent:10.0pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(comment) to “~~ will be the

<b><u>single, complete CFDP PDU or aggregation of CFDP PDUs according to 3.1.4.</u></b>” to reuse sentences that are repeatedly used in other sentences and the complete client data can be ambiguous because it could be interpreted as entire CFDP data or unit

 segment of CFDP PDU<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="text-indent:10.0pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">3.5.4   A CFDP UNITDATA.request shall generate a Transmission.request where:<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:15.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">The client service data to send shall contain an aggregation of CFDP PDU according to 3.1.4.<o:p></o:p></span></span></p>

<p class="MsoNormal" style="text-indent:15.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">Length of red-part shall be set to the size of the aggregation of CFDP PDU.<o:p></o:p></span></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"> (comment) to

<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:15.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">The client service data to send shall <b><u>be able to</u></b> contain an aggregation of CFDP PDU according to 3.1.4.<o:p></o:p></span></span></p>

<p class="MsoNormal" style="text-indent:15.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">Length of red-part shall be set to the size of <b><u>a complete CFDP PDU or the size of aggregation of CFDP PDUs.</u></b><o:p></o:p></span></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">   Because aggregation of CFDP PDUs in BP UT Layer and LTP UT Layer is NOT an mandate, but possibility I think.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"> 3.5.5   A RedPartReception.indication shall generate a CFDP UNITDATA.indication where:<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:20.0pt;word-break:break-hangul"><span style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">–

<span lang="EN-US">The CFDP protocol data unit UT_SDU shall contain the red-part bytes, i.e. a complete aggregation of CFDP PDU according to 3.1.4.<o:p></o:p></span></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"> (comment) to “The CFDP protocol data unit UT_SDU shall contain the red-part bytes, i.e.

<b><u>a complete CFDP PDU or completed CFDP PDUs if aggregation according to  3.1.4. is applied.</u></b>”<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">O UDP/IP UT Layer - on page 3-7<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">3.6.4 A CFDP UNITDATA.request shall

<u>send</u> a single UDP datagram with a single, complete CFDP PDU included in the data part.<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(comment) to “A CFDP UNITDATA.request shall

<b><u>initiate sending a single, complete CFDP PDU via UDP datagram</u></b>.” The theoretical limit of UDP datagram is 65535 (however, technically less than that), i.e. 64k bytes. So if user wants to set the CFDP segmentation as bigger than 64k, this UDP UT

 layer implementation should support multiple UDP datagram for sending bigger CFDP PDU segmentation size. This sentence can be simplified as written in TCP/IP section.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"> (comment) this part also can have “3.6.5 No non-CFDP data shall be sent over a UDP datagram used by CFDP.” instead

 of “3.6.5  Only CFDP PDU shall be sent to the UDP port of the listening CFDP application.”. It’s your call.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">O TCP/IP UT Layer on page 3-8<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">3.7.4 A CFDP UNITDATA.request shall initiate sending a CFDP PDU via a TCP connection.<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:7.2pt;word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">(comment) to “A CFDP UNITDATA.request shall initiate sending a

<b><u>single, complete</u></b> CFDP PDU via a TCP connection.” to reuse sentences that are repeatedly used in other sentences<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">Thanks.<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">Best,<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO">Cheol<o:p></o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

<p class="MsoNormal" style="word-break:break-hangul"><span lang="EN-US" style="font-size:10.0pt;font-family:"맑은 고딕";mso-fareast-language:KO"><o:p> </o:p></span></p>

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<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none;mso-fareast-language:KO">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none;mso-fareast-language:KO"> Felix Flentge

 via SIS-CFDPV1 <sis-cfdpv1@mailman.ccsds.org> <br>

<b>Sent:</b> Tuesday, September 17, 2024 12:24 AM<br>

<b>To:</b> sis-cfdpv1@mailman.ccsds.org; Tomaso de Cola <Tomaso.deCola@dlr.de><br>

<b>Subject:</b> [SIS-CFDPV1] CCSDS 722.1-M-2: CFDP Unitdata Transfer Layers - Final Draft<o:p></o:p></span></p>

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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>

<p class="MsoNormal"><span lang="EN-GB">Hi,<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">I have just concluded my final edits of the update CFDP UT Layer Book:<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"><a href="https://protect2.fireeye.com/v1/url?k=01554586-5ece2f8e-01503408-ac1f6bdccbcc-28675b83a745346e&q=1&e=d0fdfab3-219b-4fdd-b906-62106b2a63f5&u=https%3A%2F%2Fcwe.ccsds.org%2Fsis%2F_layouts%2F15%2FWopiFrame.aspx%3Fsourcedoc%3D%257B4A0292CA-C9F5-4B5D-A39F-789C158465B5%257D%26file%3D722x1m2_CFDP%2520Unitdata%2520Transfer%2520Layers%2520Magenta%2520Book%2520DRAFT-C.doc%26action%3Ddefault%26CT%3D1726499472306%26OR%3DDocLibClassicUI">722x1m2_CFDP

 Unitdata Transfer Layers Magenta Book DRAFT-C.doc (ccsds.org)</a><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">I have done the changes as discussed during the last meeting. I hope that it is now very clear that only LTP red is expected to be used (see 3.5). For BP, I had to switch back to refer to the current (BPv6) CCSDS Blue

 Book (I have been too optimistic regarding the publication of the BPv7 version). However, there is a note that the same principles will apply for BPv7 (see 3.4, I think this is the best we currently can do).<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">I would like to submit it to the editor’s queue on 30 September (<a id="OWAAM8E459EAF3A6547C28DCA62437826996F" href="mailto:Tomaso.deCola@dlr.de"><span style="font-family:Aptos;text-decoration:none">@Tomaso de Cola</span></a>:

 please let me know how the process exactly works). So, if you have any final comments, please let me know before.<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" style="mso-ligatures:none;mso-fareast-language:EN-GB">Regards,<o:p></o:p></span></p>

<p class="MsoNormal"><span lang="EN-GB" style="mso-ligatures:none;mso-fareast-language:EN-GB">Felix<o:p></o:p></span></p>

<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>

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 unauthorised disclosure, use, retention or dissemination is prohibited. If you have received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries,

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<o:p></o:p></span></p>

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