Re: [Bloat] Really getting 1G out of ISP?

[Aaron Wood <woody77@gmail.com>]

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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).

On Tue, Jul 6, 2021 at 3:28 PM Wheelock, Ian <ian.wheelock@commscope.com>
wrote:

> 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), so it should be
> enabled.
>
> Get Outlook for Android <https://aka.ms/AAb9ysg>
>
> ------------------------------
> *From:* Bloat <bloat-bounces@lists.bufferbloat.net> on behalf of Aaron
> Wood <woody77@gmail.com>
> *Sent:* Tuesday, July 6, 2021 11:13:59 PM
> *To:* Livingood, Jason <Jason_Livingood@comcast.com>
> *Cc:* bloat@lists.bufferbloat.net <bloat@lists.bufferbloat.net>
> *Subject:* Re: [Bloat] Really getting 1G out of ISP?
>
> 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?)
>
> -Aaron
>
> On Tue, Jun 22, 2021 at 4:04 PM Livingood, Jason via Bloat <
> bloat@lists.bufferbloat.net> wrote:
>
> > For DOCSIS the issue seems to be an unfortunate frequency split between
> up and downstream and use of lower efficiency coding schemes.
>
> 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.
>
> JL
>
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