Re: CVS commit: src/sys/dev/ic

[Rui Paulo <rpaulo%fnop.net@localhost>]

At Thu, 8 Jun 2006 16:23:52 -0500,
David Young wrote:
> 
> On Thu, Jun 08, 2006 at 08:56:41PM +0000, Rui Paulo wrote:
> > 
> > Module Name:        src
> > Committed By:       rpaulo
> > Date:               Thu Jun  8 20:56:41 UTC 2006
> > 
> > Modified Files:
> >     src/sys/dev/ic: rt2661.c rt2661var.h
> > 
> > Log Message:
> > Bring the following change from OpenBSD:
> > 
> >   Keep track of the average RSSI using an Exponential Moving Average (EMA).
> >   Use it to dynamically tune radio receive sensitivity.
> > 
> >   The idea is simple:
> >   - increase sensitivity when the RSSI is bad to optimize throughput on
> >     long distance to the AP, and
> >   - decrease sensitivity when the RSSI is good to reduce noise level and
> >     optimize throughput on short distance to the AP
> > 
> >   The EMA allows to smooth RSSI variations so we don't end up changing the
> >   sensitivity too frequently.  We check if it would be worth updating the
> >   sensitivity every one second.
> >   RSSI thresholds were taken from the Ralink Tech. Linux driver.
> 
> I don't know if I buy it.  What if you have both a near client and a
> far client?

As Garrett pointed out this makes sense on bss/ibss mode only. So,
what do you think about using it for those modes or adding a link0
flag ?