Re: [Cerowrt-devel] dlte

[Dave Taht <dave@taht.net>]

"David P. Reed" <dpreed@deepplum.com> writes:

> Conquer the spectrum licensing and device certification nexus. Or else
> your cell is will pwn yr physical world.
>
> LTE over UNII band is not even as good as CSMA at sharing and
> cooperation, and without coordination at installation planning time,
> it doesn't work well.
>
> 802.11ax has the same fragility in Multi Unit Dwellings due to
> requiring a radio propagation plan and coordination so neighbors don't
> completely jam neighbors.

I have not been tracking ax well of late. I had heard they were doing
smarter things with smaller channels, which gave me hope. 

>
> Don't obsess about throughput at the link layer, when the design
> assumes exclusive rights to transmit.

Given how hard it has been to get a mere lte dongle to work right, I am
inclined to disregard a lot of the 5G hype. 

> There are techniques for cooperative space-time-rate multiplexing that
> scale. LTE licensed or unlicensed or 802.11ax are not such techniques.
>
> Small cells are a fantasy of the carriers that they can put their
> licensed gear on your property at points they choose. Technically it
> appears to work in an abstract fantasy prototype. In the real world,
> it can't scale unless you let the phone company invade your premises
> and control all your placement of furniture, doors, mirrors, etc.

Well, I kind of envision that happening, unless we make wifi work really
really well again. I loved learning about low-e glass recently, I think
that is going to interfere with celluar, and make wifi deployments better.

> ----Original Message-----
> From: "Toke Høiland-Jørgensen" <toke@toke.dk>
> Sent: Fri, Dec 7, 2018 at 4:08 am
> To: "Dave Taht" <dave@taht.net>
> Cc: "Dave Taht" <dave@taht.net>, "cerowrt-devel"
> <cerowrt-devel@lists.bufferbloat.net>
> Subject: Re: [Cerowrt-devel] dlte
>
> Dave Taht  writes:
>
>> Toke Høiland-Jørgensen  writes:
>>
>>> Mikael Abrahamsson  writes:
>>>
>>>> On Tue, 4 Dec 2018, Dave Taht wrote:
>>>>
>>>>> I expect dave reed to comment, so I'll withhold mine for now
>>>>>
>>>>> https://kurti.sh/pubs/dLTE-Johnson-HotNets-2018.pdf
>>>>
>>>> When I read the first page I was hopeful, then unfortunately I got
>>>> disappointed and just quickly scanned the rest. It's still
>>>> tunneled and
>>>> the same architecture, just more distributed.
>>>
>>> OK, now I read the paper, and I think you may have missed the part
>>> where
>>> they say that they terminate the tunnelling at the AP and assign
>>> new IPs
>>> whenever a client roams. So it's basically WiFi APs over the LTE
>>> layer-2... Which is pretty cool, I think :)
>>
>> It's still based on the false optimism that users will ever get to
>> own
>> and control their own LTE AP.
>
> Well, they did say they had done proof of concept tests; and that they
> could build a base station for $8000... So might not be completely
> impossible...
>
> -Toke
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