From owner-freebsd-net@FreeBSD.ORG Thu Sep 9 21:00:31 2010 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C85AA10657C4 for ; Thu, 9 Sep 2010 21:00:31 +0000 (UTC) (envelope-from rpaulo@freebsd.org) Received: from karen.lavabit.com (karen.lavabit.com [72.249.41.33]) by mx1.freebsd.org (Postfix) with ESMTP id 8D0E48FC14 for ; Thu, 9 Sep 2010 21:00:31 +0000 (UTC) Received: from d.earth.lavabit.com (d.earth.lavabit.com [192.168.111.13]) by karen.lavabit.com (Postfix) with ESMTP id 0959911B922; Thu, 9 Sep 2010 16:00:31 -0500 (CDT) Received: from 10.0.10.2 (221.163.108.93.rev.vodafone.pt [93.108.163.221]) by lavabit.com with ESMTP id HIUU4THMPV0T; Thu, 09 Sep 2010 16:00:31 -0500 References: <1F563B4F-B1DF-4829-966D-63264EC8AB61@jnielsen.net> <9EB9CCE4-2F4A-4653-BF11-066E3490F3AF@FreeBSD.org> In-Reply-To: Mime-Version: 1.0 (Apple Message framework v1081) Content-Type: text/plain; charset=us-ascii Message-Id: Content-Transfer-Encoding: quoted-printable From: Rui Paulo Date: Thu, 9 Sep 2010 22:00:27 +0100 To: John Nielsen X-Mailer: Apple Mail (2.1081) Cc: freebsd-net@freebsd.org Subject: Re: Is 802.11n rate control being worked on? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Sep 2010 21:00:31 -0000 On 9 Sep 2010, at 14:45, John Nielsen wrote: > On Sep 8, 2010, at 8:32 AM, Rui Paulo wrote: >=20 >> On 7 Sep 2010, at 19:41, John Nielsen wrote: >>=20 >>> I am working on a network scenario which would benefit greatly from = the MIMO features and higher bandwidth of 802.11n. It's my understanding = that 11n is not fully supported in FreeBSD since there is no appropriate = rate control algorithm in the tree. Is that still the case? >>=20 >> I've worked on supporting 11n on ath_rate_sample but it's incomplete. >>=20 >>>=20 >>> I would _really_ like to run FreeBSD for this project, and I believe = the Atheros wireless cards I plan to use are supported by ath(4). I'd = like to find out what else needs to happen to complete the picture. I = may even go so far as to write some code myself. :) >>>=20 >>> Is anyone working on this at the moment? >>=20 >> Not really, I did some work in the past, but it's incomplete. >>=20 >>>=20 >>> Is it just the rate control that needs to be done or are there other = parts involved? Is MIMO separate? >>=20 >> We have MIMO on some non-Atheros drivers, but one of these drivers = (Ralink 11n) is not yet in the tree. >=20 > That would be interesting to look at. Is the code somewhere publicly = available? Is it slated to hit the tree soon? There's a git repo somewhere on the net; can't remember where. This = information should be in the FreeBSD forums. The driver is for the = rt2860. >=20 >>> Is there a detailed description of the missing pieces somewhere? Or = a not-very-detailed summary of where to look and what to read to get = started? >>=20 >> Not really. There's some interest from other FreeBSD committers to = get this going, so I'll let them chime in. >=20 > Surprisingly silent so far. Is there a better list to post this to? There aren't many folks working on this. -- Rui Paulo