Bad host-vased AP performace -- and qouple of questions about
FreeBSD WiFi stack tuning
adrian at freebsd.org
Tue Aug 9 09:47:03 UTC 2011
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!
2011/8/9 Adrian Chadd <adrian at freebsd.org>:
> There's a dBm to mW chart.
> Don't forget antenna gain.
> 2011/8/9 Lev Serebryakov <lev at serebryakov.spb.ru>:
>> Hello, Bernhard.
>> You wrote 9 августа 2011 г., 10:29:18:
>>>> (1) Hopping signal strength and total terrible WiFi network
>>>> performance -- is it broken hardware or something strange in
>>>> 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?
>> I'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.
>> Oh, yep, Tag number = 50. It is strange enough, that different WiFi
>> analyzers shows only 18M for my network and 54M for others in such
>> case. It seems, here is another (more standard? more widely used by
>> hardware 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.
>> How these dBm can be converted to mW? :) If it is "dBm" with 1W used
>> as base (30dBm), it means, that 15 dBm is only 32mW, that is 1/3 of
>> "standard" 100mW WiFi power.
>> // Black Lion AKA Lev Serebryakov <lev at serebryakov.spb.ru>
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