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

[Aaron Wood <woody77@gmail.com>]

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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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