<div dir="ltr">I'm sure it's present, as a capability. I just think it's not being used (based on what I see for upstream bloat, which is >100ms without running cake in the router).</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 6, 2021 at 3:28 PM Wheelock, Ian <<a href="mailto:ian.wheelock@commscope.com">ian.wheelock@commscope.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
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The support for AQM (PIE) is mandatory in D3.1 modems regardless of the US mode in use (ie sc-qam (3.0) or ofdma (3.1) upstream)<span id="gmail-m_-5676630279220436130ms-outlook-android-cursor"></span>, so it should be enabled.<br>
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Get <a href="https://aka.ms/AAb9ysg" target="_blank">Outlook for Android</a></div>
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<div id="gmail-m_-5676630279220436130divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Bloat <<a href="mailto:bloat-bounces@lists.bufferbloat.net" target="_blank">bloat-bounces@lists.bufferbloat.net</a>> on behalf of Aaron Wood <<a href="mailto:woody77@gmail.com" target="_blank">woody77@gmail.com</a>><br>
<b>Sent:</b> Tuesday, July 6, 2021 11:13:59 PM<br>
<b>To:</b> Livingood, Jason <<a href="mailto:Jason_Livingood@comcast.com" target="_blank">Jason_Livingood@comcast.com</a>><br>
<b>Cc:</b> <a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a> <<a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a>><br>
<b>Subject:</b> Re: [Bloat] Really getting 1G out of ISP?</font>
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<div dir="ltr">Are these in-flux changes to where the upstream split is why some modems report DOCSIS 3.1 downstream, but only 3.0 upstream? (and therefore aren't enabling AQM on the upstream?)
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<div>-Aaron</div>
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<div dir="ltr">On Tue, Jun 22, 2021 at 4:04 PM Livingood, Jason via Bloat <<a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br>
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> For DOCSIS the issue seems to be an unfortunate frequency split between up and downstream and use of lower efficiency coding schemes.<br>
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Performance really takes a big step forward once a person has a D3.1 modem in their home, bringing OFDM and OFDMA as key advancements. Also in flux at the moment is where the upstream split is in cable networks, which are moving to mid-split or high-split designs
that bring more upstream bandwidth. As well, over the past 18+ months, most cable networks have added substantially more upstream channels as well as performed quite a number of fiber node splits. And that is just below the physical layer stuff - there's also
a lot of work at the software layer for modems and CMTSes that is quite interesting.<br>
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JL<br>
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