From owner-freebsd-wireless@FreeBSD.ORG Tue Aug 9 09:35:54 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 2CBC61065672; Tue, 9 Aug 2011 09:35:54 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-gy0-f182.google.com (mail-gy0-f182.google.com [209.85.160.182]) by mx1.freebsd.org (Postfix) with ESMTP id CA8D38FC13; Tue, 9 Aug 2011 09:35:53 +0000 (UTC) Received: by gyd10 with SMTP id 10so2438329gyd.13 for ; Tue, 09 Aug 2011 02:35:53 -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=kl5wECs86r+cmUG/w7/hSa+Sgawf/7jIFTDnRuMBoKA=; b=oIMEIPdAUszR+WBUpsApFyrIg2ei+WjbgG28JS551g2t0cIdPXF9uSUqLmUXULro5c qArul+pafhZilRAPPREHJ/GEc7s5+OPU4qufYy2cUvqjUv1DQVAVEwZ0HxzqrkFd8rpG FOwLgwV3SkEuXlpa1g6lc1GDBsvo17iWklEyA= MIME-Version: 1.0 Received: by 10.150.95.21 with SMTP id s21mr855603ybb.101.1312882553029; Tue, 09 Aug 2011 02:35:53 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.151.26.14 with HTTP; Tue, 9 Aug 2011 02:35:52 -0700 (PDT) In-Reply-To: <1681554189.20110809132747@serebryakov.spb.ru> References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru> Date: Tue, 9 Aug 2011 17:35:52 +0800 X-Google-Sender-Auth: 1W7IkMcpGaJB2GdNcw_sdWrXOIA 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 09:35:54 -0000 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.or= g" >