From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x230.google.com (mail-qk0-x230.google.com [IPv6:2607:f8b0:400d:c09::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id E96CF3BA8E for ; Thu, 30 Nov 2017 03:07:51 -0500 (EST) Received: by mail-qk0-x230.google.com with SMTP id a71so7755891qkc.9 for ; Thu, 30 Nov 2017 00:07:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=4iZ5A72Ewb44xv2hr1HOUDJfxAmIfx8+AZnmHvnLadk=; b=aDLlc6595UQf8yk/DkcdoWj2pspKT9tTyNOiBMI7Pk+rXCcoESjioyLohNd+rtsDF0 CTBEKRUa0RcYgqKiKZ0J8L7LolbN6F856wgUJlKtLDBEXeOWxwNEm5caexwQ2/l/nvWh o1uG/0vh0LUuJOLSC/UEa9ZRCQGWL/KInYBSoUnunFpqIB3nCurdysInK100I4iSnS4u 0UeqgpCHEg4FzqSPNDCMl06HUOj3SMswCPbsGBWm+tmKQgaTv/lE/+8dfDMJIL1J9j9P wkchinlY3stCbO9l5h5ojmYv27GgLsvXEvvEXjRMyseur3FjI6aFIJKMKbXMxc97QGbt 1Q9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=4iZ5A72Ewb44xv2hr1HOUDJfxAmIfx8+AZnmHvnLadk=; b=QBbRCzC2TpBRzVWhuZhPjpa6f8nurt49OIZt9G1gGHNpX625jzkvFIP6e+U2nsIY4h W5Lp96DHbWd5/hza1tEkPpe+RHXughb4BQp9inoLyQyUXIGwO0mpUXb/CWx73NgEP+Rd gMI43+5I0GSVe7h2rqv9IeGJErl0Ax3jbt9lAkQHkVPQmCLzM86mQdTSd9thDifZk+Wl 9bTHRCsiMZ4gW3mnth97jNoQZ3b8vQ1TxZwkYyIVAE6ebQzuLi0hW2wvCUND8FtpeYT/ D5b4O6++neXynJy7QZtCxgKXJ3XZ7/EJnXLoJoGYnPjxTp3PMA4VWZy/F9YN/yqEcCpW aC0w== X-Gm-Message-State: AKGB3mIh4Y8ntpW+WIku09/MI1D/6P0Hva2VXErWd7et5FanpWwdixdb sCIqnwJt5PqJJnIb3kwjRQw8iuuROvn1M+ZlERqgZA== X-Google-Smtp-Source: AGs4zMYl3eequKe0mSyQ/21T7DZp5NlXB3WaT8CtKTJLi0rhdMOQcZiamECkxTrYSgv5aTVBy19T3avxg2BwfDseQlM= X-Received: by 10.55.154.85 with SMTP id c82mr1534651qke.327.1512029271492; Thu, 30 Nov 2017 00:07:51 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.193.93 with HTTP; Thu, 30 Nov 2017 00:07:51 -0800 (PST) In-Reply-To: References: <87lgionrl5.fsf@toke.dk> From: Dave Taht Date: Thu, 30 Nov 2017 00:07:51 -0800 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Cc: make-wifi-fast@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] Fwd: Re: [iccrg] TCP behavior across WiFi pointers ? X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Nov 2017 08:07:52 -0000 "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=E2=80=99s 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 wrote: > wow. *median* of 7 interfering APs at 2.4ghz. 10% with more than 29 inter= ferers. > > On Wed, Nov 29, 2017 at 11:39 PM, Toke H=C3=B8iland-J=C3=B8rgensen 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 >> To: Aaron Falk >> Cc: Toerless Eckert , iccrg@irtf.org, tsv-area@ietf.= org, Michael Welzl , Mark Allman >> Bcc: >> Date: Wed, 29 Nov 2017 16:41:04 -0800 >> Subject: Re: [iccrg] TCP behavior across WiFi pointers ? >> We=E2=80=99ve 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 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 wrote: >>> >>> I would think that 1) there are probably pointers, and 2) the people wh= o have them should be on the ICCRG list, which I=E2=80=99m cc=E2=80=99ing. >>> >>> I suggest for this to be the last email that includes tsvarea so that t= he thread entirely moves to ICCRG. >>> >>> >>> > On Nov 8, 2017, at 6:42 PM, Toerless Eckert wrot= e: >>> > >>> > Any pointers to work analyzing the differences in behavior when TCP i= s 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 character= istics >>> > of those end-to-end retransmissions is (would assume they would be la= rger >>> > than N msec, where N is whatever the L2/wifi protection window is, wh= ich >>> > unfortunately i don't know). >>> > >>> > Asking because we've got the poor "must-sit-in-back-of-the-bus" traff= ic >>> > 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 >>> > >>> >> _______________________________________________ >> iccrg mailing list >> iccrg@irtf.org >> https://www.irtf.org/mailman/listinfo/iccrg >> >> >> >> _______________________________________________ >> iccrg mailing list >> iccrg@irtf.org >> https://www.irtf.org/mailman/listinfo/iccrg >> >> _______________________________________________ >> Make-wifi-fast mailing list >> Make-wifi-fast@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/make-wifi-fast > > > > -- > > Dave T=C3=A4ht > CEO, TekLibre, LLC > http://www.teklibre.com > Tel: 1-669-226-2619 --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619