From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-x234.google.com (mail-wi0-x234.google.com [IPv6:2a00:1450:400c:c05::234]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 7785821F1BC for ; Sat, 21 Dec 2013 10:03:41 -0800 (PST) Received: by mail-wi0-f180.google.com with SMTP id hm19so4927287wib.13 for ; Sat, 21 Dec 2013 10:03:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=uypU5G6DzoCYOx6nq7WmhoNvIWMApy1wz966/PDHf/A=; b=IULYXFO1tMFEI+RMxdLpJzmxMI0jP85Y7MiWT456JE3QGkjZeR4HtfcivkgbCX/RgN xwsvXiygyG04MfylcMPib0IL6ViLOF2pdJgxfFRJLzZZ1fqmBCP5fXJW2oH6kZZ5LYGN DR87hz/q+iEI6GkmWj7vQNk3SAhpXaeL94b1D+0uemSBafnuT63m+HqnURV0hmTaZ1Yu 6zLM+MLBHIAiA3wgnoo+iSDIvGOmzCIc6Jw3YcHj1g5D5Z+vERIsV1I58GBDEK0g2OtE 4Lyv233fDwNa6umso62ZHQaDIOBZYQ4QeaOW0PlLZMc3Sm2wWsK5h/DZqcEFVvOksRxK 8tiQ== MIME-Version: 1.0 X-Received: by 10.180.101.197 with SMTP id fi5mr12760444wib.46.1387649019685; Sat, 21 Dec 2013 10:03:39 -0800 (PST) Received: by 10.217.123.69 with HTTP; Sat, 21 Dec 2013 10:03:39 -0800 (PST) In-Reply-To: References: Date: Sat, 21 Dec 2013 10:03:39 -0800 Message-ID: From: Dave Taht To: bloat Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Subject: [Bloat] Fwd: [iccrg] Initial Spreading: a proposal to safely enlarge the TCP's IW X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Dec 2013 18:03:42 -0000 ---------- Forwarded message ---------- From: renaud sallantin Date: Sat, Dec 21, 2013 at 8:31 AM Subject: [iccrg] Initial Spreading: a proposal to safely enlarge the TCP's = IW To: iccrg@irtf.org Cc: cedric baudoin , Fabrice Arnal , Dubois Emmanuel , Andre-Luc Beylot , Chaput Dear all, We would like to share and discuss with you a mechanism we called =93Initial Spreading=94 (IS). The idea consists in the combination of high IW (e.g. IW=3D10), jointly with a spreading of those segments over, at most, the first RTT of the connection. After the sending of the IW, we switch back to the scheduling of the TCP algorithms=85 Our motivation lays in the fact that raising IW, as largely discussed previously, is good, unless the network is congested. In that case, IS prevents the large initial burst to occur, and to this respect is not too aggressive for the network, but still avoids the drawbacks of solutions such as Pacing. We have shown we can achieve a sounding compromise to the enhancement of the TCP connection startup, in various environments : LAN, wireless and LFN networks (including satellite access which was our initial target). We recently presented this work to the LCN=9213 conference in Sydney, supported by extensive NS2 simulations. (R. Sallantin, C. Baudoin, E. Chaput, E. Dubois, F. Arnal, and A. Beylot, =93Initial spreading: a fast start-up tcp mechanism,=94 proceedings of LCN, October 23, 2013.) The paper hasn=92t been published yet on IEEEXplore but should be available soon. A draft version of this work is available here : http://www.irit.fr/publis/IRT/InitialSpreading.pdf Finally, we have implemented this scheme in the Linux-kernel. Preliminary results validate the proposed scheme and our simulation experiments. We will open the sources and provide related packages by the end of January. We are also working on the optimization of the interval between successive segments during the first RTT, taking into account impact of bursts and implementation constraints. We would be more than happy to receive at this stage your feedback. Do we have to ask for an ID first? Renaud Sallantin Thales Alenia Space/CNES/TeSA PhD _______________________________________________ iccrg mailing list iccrg@irtf.org https://www.irtf.org/mailman/listinfo/iccrg --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html