Re: [Make-wifi-fast] Fwd: Re: [iccrg] TCP behavior across WiFi pointers ?

[Dave Taht <dave.taht@gmail.com>]

"We propose that receiving of an 802.11 ACK is a reliable hint that
the corresponding TCP segments will eventually be processed by the
receiver’s transport layer. On receipt of an 802.11 ACK from the
wireless client, the AP will proactively generate a fake TCP ACK on
behalf of the TCP receiver, forwarding it to the TCP sender. This
results in the TCP ACKs arriving sooner at the sender, eliminating the
delay variation induced by medium contention at the receiver. Since
the receiver will still send a TCP ACK, these now-duplicate TCP ACKs
should be suppressed by the AP. The TCP sender is thus shielded in the
revers..."



On Thu, Nov 30, 2017 at 12:04 AM, Dave Taht <dave.taht@gmail.com> wrote:
> wow. *median* of 7 interfering APs at 2.4ghz. 10% with more than 29 interferers.
>
> On Wed, Nov 29, 2017 at 11:39 PM, Toke Høiland-Jørgensen <toke@toke.dk> wrote:
>> The folks over at Meraki had a paper at this year's IMC talking about
>> TCP over WiFi.
>>
>> -Toke
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Simon Barber <simon@superduper.net>
>> To: Aaron Falk <aaron.falk@gmail.com>
>> Cc: Toerless Eckert <tte+ietf@cs.fau.de>, iccrg@irtf.org, tsv-area@ietf.org, Michael Welzl <michawe@ifi.uio.no>, Mark Allman <mallman@icir.org>
>> Bcc:
>> Date: Wed, 29 Nov 2017 16:41:04 -0800
>> Subject: Re: [iccrg] TCP behavior across WiFi pointers ?
>> We’ve been doing some studies and work in this area at Meraki.
>>
>> https://conferences.sigcomm.org/imc/2017/papers/imc17-final203.pdf
>>
>> Simon
>>
>>
>> On Nov 29, 2017, at 7:17 AM, Aaron Falk <aaron.falk@gmail.com> wrote:
>>
>> Hey Mark-
>>
>> Didn't you do some work on TCP over wifi a while ago?
>>
>> --aaron
>>
>> On Wed, Nov 8, 2017 at 1:33 PM Michael Welzl <michawe@ifi.uio.no> wrote:
>>>
>>> I would think that 1) there are probably pointers, and 2) the people who have them should be on the ICCRG list, which I’m cc’ing.
>>>
>>> I suggest for this to be the last email that includes tsvarea so that the thread entirely moves to ICCRG.
>>>
>>>
>>> > On Nov 8, 2017, at 6:42 PM, Toerless Eckert <tte+ietf@cs.fau.de> wrote:
>>> >
>>> > Any pointers to work analyzing the differences in behavior when TCP is run
>>> > across WiFi as opposed to wired ? Especially with WiFi in the home ?
>>> >
>>> > I am primarily thinking that there could be a higher demand for
>>> > TCP (end-to-end) retransmissions when using WiFi because the L2/WiFi
>>> > local retransmissions are insufficient. And if so, what the characteristics
>>> > of those end-to-end retransmissions is (would assume they would be larger
>>> > than N msec, where N is whatever the L2/wifi protection window is, which
>>> > unfortunately i don't know).
>>> >
>>> > Asking because we've got the poor "must-sit-in-back-of-the-bus" traffic
>>> > called IP multicast that is not protected by L2/wifi retransmissions at
>>> > all and now we're wondering if carrying it over TCP as a workaround
>>> > could help, and therefore trying to educate myself on specific known
>>> > issue left when running traffic over TCP over WiFi.
>>> >
>>> > If any other TSV or other WG mailing list might be a better place to
>>> > ask. pls. let me know.
>>> >
>>> > Thank!
>>> >    Toerless
>>> >
>>>
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>
>
>
> --
>
> Dave Täht
> CEO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-669-226-2619



-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619