Date: Tue, 9 Aug 2011 17:35:52 +0800 From: Adrian Chadd <adrian@freebsd.org> To: Lev Serebryakov <lev@serebryakov.spb.ru> Cc: freebsd-wireless@freebsd.org, Bernhard Schmidt <bschmidt@freebsd.org> Subject: Re: Bad host-vased AP performace -- and qouple of questions about FreeBSD WiFi stack tuning Message-ID: <CAJ-VmokAuF6rmN=x1oTE5jksrbf2Psew7-4Qb%2BWd-=kZS1svaQ@mail.gmail.com> In-Reply-To: <1681554189.20110809132747@serebryakov.spb.ru> References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru>
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There's a dBm to mW chart. Don't forget antenna gain. Adrian 2011/8/9 Lev Serebryakov <lev@serebryakov.spb.ru>: > 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 <lev@serebryakov.spb.ru> > > _______________________________________________ > 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" >
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