<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <p>Hi Lincoln,</p> <p>Thank you very much for the feedback, I'll look into the documentation you provided.<br> In the meanwhile may I ask if there is a publicly available recording of the training session you mentioned? (or similar training sessions done in the past).</p> <p>Thank you,<br> Mattia<br> </p> <div class="moz-cite-prefix">On 31/05/2024 14:40, Lincoln Lavoie wrote:<br> </div> <blockquote type="cite" cite="mid:CAOE1vsMazi_PpnqWV2Z=xaFCPhnhWaT_EogBmKBdeKcAVvNOpg@mail.gmail.com"> <table style="cellpadding:0;border:0;cellspacing:0;display:table;width:100%;table-layout:fixed;border-collapse:seperate;float:none;" width="100%" cellspacing="0" cellpadding="0" border="0" align="left"> <tbody style="display:block;"> <tr> <td cellpadding="7px 2px 7px 2px" style="padding:7px 2px 7px 2px;background-color:#A6A6A6;valign:middle" width="1px" valign="middle" bgcolor="#A6A6A6"> <br> </td> <td cellpadding="7px 5px 7px 15px" color="#212121" style="width:100%;background-color:#EAEAEA;padding:7px 5px 7px 15px;font-family:wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial, sans-serif;font-size:12px;font-weight:normal;color:#212121;text-align:left;word-wrap:break-word;" width="100%" valign="middle" bgcolor="#EAEAEA"> <div>You don't often get email from <a class="moz-txt-link-abbreviated" href="mailto:lylavoie@iol.unh.edu">lylavoie@iol.unh.edu</a>. <a href="https://aka.ms/LearnAboutSenderIdentification" moz-do-not-send="true"> Learn why this is important</a></div> </td> <td cellpadding="7px 5px 7px 5px" color="#212121" style="width:75px;background-color:#EAEAEA;padding:7px 5px 7px 5px;font-family:wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial, sans-serif;font-size:12px;font-weight:normal;color:#212121;text-align:left;word-wrap:break-word;align:left" width="75px" valign="middle" bgcolor="#EAEAEA" align="left"> <br> </td> </tr> </tbody> </table> <div> <table width="100%" cellspacing="0" cellpadding="0" border="0" align="left">  <tbody> <tr> <td style="background: #ffb900; padding: 5pt 2pt 5pt 2pt;"> </td> <td style="background: #fff8e5; padding: 5pt 4pt 5pt 12pt; word-wrap: break-word;" width="100%"> <div style="color: #222222;"><span style="color: #222; font-weight: bold;"><font size="3">CAUTION:</font></span><font size="3"> This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information.</font></div> <font size="3"> </font></td> </tr> </tbody> </table> <p> </p> <div> <div dir="ltr"> <div class="gmail_default" style="font-size:small">Hi Mattia,</div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">The code is being used, and there are some patches in flight, but are currently coming from Open Air Interface folks. There's a lot of documentation here: <a href="https://gitlab.eurecom.fr/oai/openairinterface5g/-/blob/develop/doc/ORAN_FHI7.2_Tutorial.md?ref_type=heads" moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.eurecom.fr/oai/openairinterface5g/-/blob/develop/doc/ORAN_FHI7.2_Tutorial.md?ref_type=heads</a></div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">We are actually running this in the lab and even hosted a training session on the O-RAN aspects of the setup yesterday with Northeastern and the OAI / VIAVI teams. Point is, it's not really completely dead, just not a lot of movement in that one repo.</div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">On the hardware, it has been run on both Nvidia and Intel NICs, but there are some requirements on things like PTP time stamping, but that comes with the O-RAN fronthaul requirements.</div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">For the VLAN header, that is handled with the VFs are creates and "handed" to the xran processes that get embedded into the DU (at least in the OAI implementation).</div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">Cheers,<br> Lincoln</div> <div class="gmail_default" style="font-size:small"><br> </div> </div> <br> <div class="gmail_quote"> <div dir="ltr" class="gmail_attr">On Wed, May 29, 2024 at 4:04 AM Mattia Milani <<a href="mailto:mattia.milani@nokia.com" moz-do-not-send="true" class="moz-txt-link-freetext">mattia.milani@nokia.com</a>> wrote:<br> </div> <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <div> <p>Dear Lincoln,</p> <p>Thank you very much for providing this reference.</p> <p>I've to admit that I didn't know about this library but I'm looking into it <br> but I have some questions/concerns.</p> <p>This library seems to be abandoned since 2 years, at least this is what I<br> see from both the documentation and also their version control system:<br> <a href="https://gerrit.o-ran-sc.org/r/gitweb?p=o-du%2Fphy.git;a=summary" target="_blank" moz-do-not-send="true">https://gerrit.o-ran-sc.org/r/gitweb?p=o-du%2Fphy.git;a=summary<br> </a>Do you think it's still reliable?</p> <p>The assumptions seems to be quite restrictive on the HW requirements of<br> this library listed here: <a href="https://docs.o-ran-sc.org/projects/o-ran-sc-o-du-phy/en/latest/Assumptions_Dependencies.html#requirements" target="_blank" moz-do-not-send="true"> https://docs.o-ran-sc.org/projects/o-ran-sc-o-du-phy/en/latest/Assumptions_Dependencies.html#requirements<br> </a>With my experiments I'm just exploring using virtual interfaces and my HW,<br> I would like to avoid those constraints.</p> <p>From what I can see some of the data structures already provided by DPDK<br> are re-defined by this library, like the eth header data structure and the eCPRI header.<br> I don't know if this is due to implementation reasons or because it has been <br> built with an old version of DPDK.<br> But without taking in consideration the endianess like rte_ecpri.h already does in DPDK<br> and without supporting some msg types (line 94 file xran_pkt.h).<br> </p> <p>Digging into the source code a bit I found some of the data structures I'm referring to<br> in my original message, i.e. the ecpri Seq. ID. The following code puzzles me, source file at:<br> <a href="https://gerrit.o-ran-sc.org/r/gitweb?p=o-du/phy.git;a=blob;f=fhi_lib/lib/api/xran_pkt.h;h=314b8d6b7d08f153369de5ad535702f50a574a35;hb=HEAD" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://gerrit.o-ran-sc.org/r/gitweb?p=o-du/phy.git;a=blob;f=fhi_lib/lib/api/xran_pkt.h;h=314b8d6b7d08f153369de5ad535702f50a574a35;hb=HEAD</a><br> line 228:<br> struct xran_ecpri_hdr<br> {<br> union xran_ecpri_cmn_hdr cmnhdr;<br> rte_be16_t ecpri_xtc_id; /**< 3.1.3.1.6 real time control data / IQ data transfer message series identifier */<br> union ecpri_seq_id ecpri_seq_id; /**< 3.1.3.1.7 message identifier */<br> } __rte_packed;</p> <p>Seems strange to me that ecpri_xtc_id is not a data structure on it's own, providing access to DU port, Band Sector etc.<br> Also, the 'xran_pkt_comm_hdr' data structure at line 336 assumes that the packet doesn't have a VLAN header, but,<br> I don't know if this is managed elsewhere.</p> <p>Given all that, I'm still of the idea that could be useful to have those kind of headers directly in DPDK<br> but I'm open to reconsider my statement, please let me know if you have more information regarding<br> this library.</p> <p>Best regards,<br> Mattia<br> </p> <p><br> </p> <div>On 28/05/2024 16:37, Lincoln Lavoie wrote:<br> </div> <blockquote type="cite"> <table style="border:0px;display:table;width:100%;table-layout:fixed;float:none" width="100%" cellspacing="0" cellpadding="0" border="0" align="left"> <tbody style="display:block"> <tr> <td cellpadding="7px 2px 7px 2px" style="padding:7px 2px;background-color:rgb(166,166,166)" width="1px" valign="middle" bgcolor="#A6A6A6"> <br> </td> <td cellpadding="7px 5px 7px 15px" color="#212121" style="width:100%;background-color:rgb(234,234,234);padding:7px 5px 7px 15px;font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;font-size:12px;font-weight:normal;color:rgb(33,33,33);text-align:left" width="100%" valign="middle" bgcolor="#EAEAEA"> <div>You don't often get email from <a href="mailto:lylavoie@iol.unh.edu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext"> lylavoie@iol.unh.edu</a>. <a href="https://aka.ms/LearnAboutSenderIdentification" target="_blank" moz-do-not-send="true"> Learn why this is important</a></div> </td> <td cellpadding="7px 5px 7px 5px" color="#212121" style="width:75px;background-color:rgb(234,234,234);padding:7px 5px;font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;font-size:12px;font-weight:normal;color:rgb(33,33,33);text-align:left" width="75px" valign="middle" bgcolor="#EAEAEA" align="left"> <br> </td> </tr> </tbody> </table> <div> <table width="100%" cellspacing="0" cellpadding="0" border="0" align="left"> <tbody> <tr> <td style="background:rgb(255,185,0);padding:5pt 2pt"> </td> <td style="background:rgb(255,248,229);padding:5pt 4pt 5pt 12pt" width="100%"> <div style="color:rgb(34,34,34)"><span style="color:rgb(34,34,34);font-weight:bold"><font size="3">CAUTION:</font></span><font size="3"> This is an external email. Please be very careful when clicking links or opening attachments. See the URL <a href="http://nok.it/ext" target="_blank" moz-do-not-send="true">nok.it/ext</a> for additional information.</font></div> </td> </tr> </tbody> </table> <p> </p> <div> <div dir="ltr"> <div class="gmail_default" style="font-size:small">Hi Mattia,</div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">Have you looked into the O-RAN OSC open fronthaul phy implementation? </div> <div class="gmail_default" style="font-size:small"><a href="https://docs.o-ran-sc.org/projects/o-ran-sc-o-du-phy/en/latest/Architecture-Overview_fh.html" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://docs.o-ran-sc.org/projects/o-ran-sc-o-du-phy/en/latest/Architecture-Overview_fh.html</a><br> </div> <div class="gmail_default" style="font-size:small"><br> </div> <div class="gmail_default" style="font-size:small">Cheers,<br> Lincoln</div> </div> <br> <div class="gmail_quote"> <div dir="ltr" class="gmail_attr">On Tue, May 28, 2024 at 10:31 AM Mattia Milani <<a href="mailto:mattia.milani@nokia.com" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">mattia.milani@nokia.com</a>> wrote:<br> </div> <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Dear DPDK Dev community,<br> <br> I hope this is the correct mailing list for my questions, otherwise <br> please excuse me and let me know where my questions should be posted.<br> <br> I was looking for a data structure capable to manage O-RAN Fronthaul <br> CUS-U headers (attached a screenshot of the header structure form a <br> packet analyzed with Wireshark)<br> but I couldn't find one.<br> <br> I would like to be capable to identify the different port ids but also <br> the number of PRBs in the section part.<br> <br> I wrote my own implementation for a simple use case (I don't take in <br> consideration different versions and or data directions)<br> but it's enough for me at the moment.<br> <br> What I wanted to ask is the following:<br> - Does a data structure for this kind of header already exists?<br> - If it doesn't exists is it planned?<br> - If it's not planned could it be of some interest?<br> <br> If there is interest I would be happy to share what I developed up to <br> now to receive comments and/or assistance on how to make it fully <br> functioning.<br> <br> Best regards,<br> Mattia<br> </blockquote> </div> <br clear="all"> <div><br> </div> <span class="gmail_signature_prefix">-- </span><br> <div dir="ltr" class="gmail_signature"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div><b>Lincoln Lavoie</b><br> </div> <div>Principal Engineer, Broadband Technologies</div> <div>21 Madbury Rd., Ste. 100, Durham, NH 03824</div> <div><a href="mailto:lylavoie@iol.unh.edu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">lylavoie@iol.unh.edu</a></div> <div><a href="https://www.iol.unh.edu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://www.iol.unh.edu</a></div> <div>+1-603-674-2755 (m)</div> <div><a href="https://www.iol.unh.edu" target="_blank" moz-do-not-send="true"><img src="https://ci3.googleusercontent.com/mail-sig/AIorK4zvQDZE-d7SOB599offRpD7SRk4z6gdWNEkyMPxrkdJcUl0AhvdE1SQvDvhCdxiZ-wu3QjCixJ4FDew" moz-do-not-send="true" width="200" height="43"></a><br> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </blockquote> </div> </blockquote> </div> <br clear="all"> <div><br> </div> <span class="gmail_signature_prefix">-- </span><br> <div dir="ltr" class="gmail_signature"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div dir="ltr"> <div><b>Lincoln Lavoie</b><br> </div> <div>Principal Engineer, Broadband Technologies</div> <div>21 Madbury Rd., Ste. 100, Durham, NH 03824</div> <div><a href="mailto:lylavoie@iol.unh.edu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">lylavoie@iol.unh.edu</a></div> <div><a href="https://www.iol.unh.edu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://www.iol.unh.edu</a></div> <div>+1-603-674-2755 (m)</div> <div><a href="https://www.iol.unh.edu" target="_blank" moz-do-not-send="true"><img src="https://ci3.googleusercontent.com/mail-sig/AIorK4zvQDZE-d7SOB599offRpD7SRk4z6gdWNEkyMPxrkdJcUl0AhvdE1SQvDvhCdxiZ-wu3QjCixJ4FDew" moz-do-not-send="true" width="200" height="43"></a><br> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </blockquote> </body> </html>