Date: Tue, 9 Aug 2011 17:47:00 +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-Vmonbji4K1KQ18OGVhw=8Zq565RPYovhUEvAeK0NgosNNzw@mail.gmail.com> In-Reply-To: <CAJ-VmokAuF6rmN=x1oTE5jksrbf2Psew7-4Qb%2BWd-=kZS1svaQ@mail.gmail.com> References: <1151152206.20110808220720@serebryakov.spb.ru> <201108090829.18712.bschmidt@freebsd.org> <1681554189.20110809132747@serebryakov.spb.ru> <CAJ-VmokAuF6rmN=x1oTE5jksrbf2Psew7-4Qb%2BWd-=kZS1svaQ@mail.gmail.com>
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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 <adrian@freebsd.org>: > 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.o= rg" >> >
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