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Re: [RFC PATCHv2 0/2] mac80211: cfg80211: Roam trigger support

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On Wed, 2010-03-17 at 08:02 +0200, Juuso Oikarinen wrote:

> > I'm curious. How does the HW/firmware do this?
> 
> > In my testing on some hw, the beacon RSSI fluctuated wildly, so you'd
> > have to set the hysteresis pretty high.
> 
> The HW/firmware can be configured with parameters related to averaging,
> which will smoothen the worst of the fluctuation at least between single
> frames.

Ok, cool. Thanks for taking the time to answer :)

> Still, there is the WLAN tendency of a very steep RSSI curve, so we'll
> probably end up with a relatively high hysteresis. Figuring out good
> values for the config is still to-be-done.

Right. And it will be a tradeoff between roaming decision speed and
battery life.

johannes

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