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Date: Fri, 6 Feb 2009 18:56:25 -0000 (UTC)
Subject: Re: rtl8187 sleeping/hanging
From: "P.G. Richardson" <p.g.richardson@phantomjinx.co.uk>
To: "Larry Finger" <Larry.Finger@lwfinger.net>
Cc: "P.G. Richardson" <p.g.richardson@phantomjinx.co.uk>,
	linux-wireless@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Sender: linux-wireless-owner@vger.kernel.org


> P.G. Richardson wrote:
>
>> The 20db reported in iwconfig by mac80211 is not the actual data, is=
 the
>> signal strength please? I can see the signal strength change upon
>> repeated
>> calls to iwconfig and downstairs even when seemingly "out of range" =
and
>> failing to ping anything, it still reports a signal strength of abov=
e
>> 50%.
>
> Signal strength may have even less physical meaning that the power.
> Some devices, such as those by Broadcom, report the received signal
> strength with some accuracy. The RTL8187B is supposed to have such an
> output; however, my testing showed it to be essentially random. The
> only reported quantity that could be used was the automatic gain
> control setting of the receiver. This was calibrated against the
> BCM4311 at two points, assumed to be linear, and the signal strength
> and signal quality numbers were derived. For the RTL8187, a similar
> scheme was used. As you can tell, only relative values for these
> quantities are meaningful. The fact that your signal strength is abov=
e
> 50% means very little.

Good to know.

With a repeater in the living room now, I have 100/100 signal strength =
and
fewer problems with connectivity. Not perfect I think due to the positi=
on
of the router. Still network connectivity improving.

Thanks for the info.

PGR

--=20
Laws are partly formed for the sake of good men, in order to instruct t=
hem
how they may live on friendly terms with one another, and partly for th=
e
sake of those who refuse to be instructed, whose spirit cannot be subdu=
ed,
or softened, or hindered from plunging into evil. [The Laws, Plato]

You fiend! Never have I encountered such corrupt and foul-minded
perversity=85 Have you ever considered a career in the church?
Bishop of Bath and Wells (Blackadder II)

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