New minimum speed for US broadband connections

Thu Jun 3 12:40:03 UTC 2021

I think you're really out of touch with what is going on in the WISP space.

See the following product as an example:

https://www.cambiumnetworks.com/products/pmp-450/5-ghz-pmp-450m-fixed-wireless-access-point/
14x14 beam-steering Massive Multi-User MIMO.   This is able to talk, in the
same channel, at the same time, to up to 7 endpoints using both vertical
and horizontal polarities at the same time.      Total throughput per 40Mhz
channel: 1.2Gb/s per AP.

Because of the TDMA synchronization, you can actually hang two of these on
the same tower front to back using the same channel.   So 2.4Gb/s per
Frequency.  And there are dozens of channels available at this point.

Many WISPs are also using LTE hardware.  In fact, most gear that WISPs use
anymore has little resemblance to the "hang a Wifi radio on a tower" past
of the WISP industry.   They're all TDMA synchronization (since there is
little possibility for a FDMA scheme in half-duplex channels), not CSMA
like traditional wifi.   They're all moving to various advanced modulations
including multiple streams, spatial diversity, and a lot of other
high-sophistication modulations to squeeze every bit out of the available
bandwidth.

Note that by pointing this out I'm not arguing for a "WISP everywhere"
model.  Many WISPs operate a hybrid model, deploying FTTH where it makes
economical sense to do so, and using WISP technology where it doesn't.
 It's not uncommon to find areas where it's 'miles per home passed' instead
of 'homes passed per mile'.   In these environments, it is not uncommon to
see situations where the money spent deploying the fiber will never be paid
back, even if 100% of the customer revenue is deployed strictly to pay for
the fiber.

On Thu, Jun 3, 2021 at 2:50 AM Baldur Norddahl <baldur.norddahl at gmail.com>
wrote:

>
>
> On Thu, Jun 3, 2021 at 12:47 AM Seth Mattinen <sethm at rollernet.us> wrote:
>
>> UBNT's AirMax line is not "wifi". Their LTU line isn't either.
>>
>> Mike and Josh are actual WISP operators. You've stated you have no WISP
>> experience. Listen to them.
>>
>
>
> Neither will listen to me when it comes to FTTH so nah :-)
>
> Seriously, it appears to me that both are speaking from a legacy point of
> view. The equipment deployed does neither use the new frequencies available
> now, nor OFDMA which is a game changer. If nothing changes, 5G will beat
> their pants off hands down.
>
> Regards,
>
> Baldur
>
>
>

-- 
- Forrest
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