From owner-freebsd-wireless@FreeBSD.ORG Tue Aug 9 09:47:03 2011 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1A39C1065670; Tue, 9 Aug 2011 09:47:03 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com [209.85.213.182]) by mx1.freebsd.org (Postfix) with ESMTP id 815B78FC16; Tue, 9 Aug 2011 09:47:02 +0000 (UTC) Received: by yxl31 with SMTP id 31so3875272yxl.13 for ; Tue, 09 Aug 2011 02:47:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=udBjpRUCjBkMdGiFQiqb2Ipi0iL/7tHBF1Amv/UD3f0=; b=Xh/mByhq/3WPMKGn9myCVJsqlO4rnD15UxJ/eWQfb1ucbrLwusIDipgEzvAtZagbaI f2OeFfnyn6m2wj2I+sAqNAumO/qDtjK+tzgzXxrqEp1l7JMeOEEh5TSALiUPjzpIMoH8 aeMOXNxa645N0cPYcbL8w6ULcPgM5+AKkuHb0= MIME-Version: 1.0 Received: by 10.151.3.13 with SMTP id f13mr6531581ybi.215.1312883220986; Tue, 09 Aug 2011 02:47:00 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.151.26.14 with HTTP; Tue, 9 Aug 2011 02:47:00 -0700 (PDT) In-Reply-To: References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru> Date: Tue, 9 Aug 2011 17:47:00 +0800 X-Google-Sender-Auth: kjqwa9zDp1USQgxJ8Dx25tpCMH8 Message-ID: From: Adrian Chadd To: Lev Serebryakov Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: quoted-printable Cc: freebsd-wireless@freebsd.org, Bernhard Schmidt Subject: Re: Bad host-vased AP performace -- and qouple of questions about FreeBSD WiFi stack tuning X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Aug 2011 09:47:03 -0000 And the AR5212 HAL has some tx power offset stuff which I haven't really gone digging into just yet. Blah, this is why others have to be unafraid to go HAL diving and get familiar with it. It's not that scary! Adrian 2011/8/9 Adrian Chadd : > There's a dBm to mW chart. > > Don't forget antenna gain. > > Adrian > > 2011/8/9 Lev Serebryakov : >> Hello, Bernhard. >> You wrote 9 =C1=D7=C7=D5=D3=D4=C1 2011 =C7., 10:29:18: >> >>>> (1) Hopping signal strength and total terrible WiFi network >>>> =9A =9A performance -- is it broken hardware or something strange in >>>> =9A =9A FreeBSD code? >>> Either the hardware really has some issues or the signal strength is >>> just too high? I've seen that.. can you try setting a lower txpower >>> for a test? >> =9AI'll try to reduce txpower, thanks. >> >>>> (2) Why card announce only 18Mbit, but not more? >>> Seems like you're looking at the "basic rates", if you examine the >>> beacon you should find another IE which contains all rates. >> =9AOh, yep, Tag number =3D 50. It is strange enough, that different WiFi >> =9Aanalyzers shows only 18M for my network and 54M for others in such >> =9Acase. It seems, here is another (more standard? more widely used by >> =9Ahardware SOHO soapboxes?) way to specify additional rates. >> >>> at it might even in half-dbm. The iwn(4) cards for example have a >>> txpowerlimit of 15 dBm which is 30 in half-dBm. >> =9AHow these dBm can be converted to mW? :) If it is "dBm" with 1W used >> =9Aas base (30dBm), it means, that 15 dBm is only 32mW, that is 1/3 of >> =9A"standard" 100mW WiFi power. >> >> -- >> // Black Lion AKA Lev Serebryakov >> >> _______________________________________________ >> freebsd-wireless@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-wireless >> To unsubscribe, send any mail to "freebsd-wireless-unsubscribe@freebsd.o= rg" >> >