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From: Kai Timmer <email@kait.de>
To: Dan Williams <dcbw@redhat.com>
Cc: linux-wireless@vger.kernel.org
Subject: Re: Measure RSSI in adhoc networks
Date: Thu, 23 Apr 2009 12:36:33 +0200	[thread overview]
Message-ID: <5b8543210904230336j177998c4m1e0af03fbb3584df@mail.gmail.com> (raw)
In-Reply-To: <1240442334.14995.12.camel@localhost.localdomain>

2009/4/23 Dan Williams <dcbw@redhat.com>:
> You can only get an RSSI if there are other nodes in the network, and
> then you get the RSSI of *that* node, as received by your node. =C2=A0=
You
> can't measure your own RSSI, because RSSI =3D *Received* Signal Stren=
gth
> Indicator, and you can't really receive your own traffic since you're
> radiating tons of power on TX and that completely deafens the RX chai=
n.

Ok, that was clear to me. I don't know where you read that i want my
own RSSI? That would just make no sense.

> Not all drivers report RSSI in adhoc mode at this time. =C2=A0But eve=
n if
> they did, they could only report RSSI when they receive a beacon or
> traffic from some other node in the adhoc network, and that's pretty
> useless because it doesn't give you a general quality of the "network=
",
> it gives you a specific quality of the radio path between two points =
in
> the network.

Maybe i should point out, what i am trying to do :)
I need the RSSI values for distance measurements between the nodes. So
what i need is not a "quality value" for the whole network, but the
recieved mW from every reachable point in the network. So i think the
RSSI value for every network node (if i can print them out seperatly)
should do the job.

Greets,
--=20
Kai Timmer
Email : email@kait.de
Jabber: kai@kait.de
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  reply	other threads:[~2009-04-23 10:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-22 13:08 Measure RSSI in adhoc networks Kai Timmer
2009-04-22 23:18 ` Dan Williams
2009-04-23 10:36   ` Kai Timmer [this message]
2009-04-23 10:45     ` Johannes Berg
2009-04-23 11:39       ` Kai Timmer
2009-04-28  0:52         ` Luis R. Rodriguez
2009-04-28  7:59           ` Kai Timmer
2009-04-28  8:58             ` Johannes Berg

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