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<p class="MsoNormal">Dear All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For running CFDP over various UT Layers, the following is proposed:<o:p></o:p></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">EPP UT Layer (1 CFDP PDU per Encapsulation Packet - no change to current magenta book)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">SPP UT Layer (1 CFDP PDU per Space Packet – no change to current magenta book)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">BP UT Layer (n complete CFDP PDU per Bundle)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">LTP UT Layer (n complete CFDP PDU per LTP Block)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">TCP UT Layer (complete CFDP PDU in TCP stream without additional data)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">UDP UT Layer (1 CFDP PDU per UDP datagram)<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For UT Layers which allow aggregation of CFDP PDU:<o:p></o:p></p>
<ol style="margin-top:0cm" start="1" type="A">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">Aggregation of CFDP PDU for different transactions is allowed<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">Aggregation of CFDP PDU with different destination entity IDs is not allowed.<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please note that we will need to clarify in the CFDP Blue Book (3.3) that in
<o:p></o:p></p>
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<p class="MsoNormal" style="page-break-after:avoid"><span class="primitiveheading3">UNITDATA.request<o:p></o:p></span></p>
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<p class="MsoNormal" style="page-break-after:avoid">(UT_SDU, UT Address)<span style="font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-top:6.0pt;page-break-after:avoid"><span class="primitiveheading3">UNITDATA.indication<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-top:6.0pt;page-break-after:avoid">(UT_SDU, UT Address)<span style="font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">UT_SDU can be a single or a sequence of CFDP PDU. Even more, for the indication UT_SDU could also be part of a stream of CFDP PDU for stream-oriented protocols such as TCP.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">More details are included in a slightly updated presentation I have uploaded to CWE:
<a href="https://cwe.ccsds.org/sis/_layouts/15/WopiFrame.aspx?sourcedoc=%7b57C79512-5BE6-4EE9-B3BE-3EA3D9753FC5%7d&file=CFDPoverX_MagentaBook_V2.pptx&action=default">
https://cwe.ccsds.org/sis/_layouts/15/WopiFrame.aspx?sourcedoc={57C79512-5BE6-4EE9-B3BE-3EA3D9753FC5}&file=CFDPoverX_MagentaBook_V2.pptx&action=default</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please let us know about any doubts or complaints about the proposed approach.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Felix<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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