No more space in this STA's PS mo

Doug Yeager doug at aircomwireless.net
Sat Dec 7 13:32:15 EST 2002


after reading my email.  i stated it incorrectly.    after i see these 
messages,  the card resets itself.  i'll dig deeper to see if i find any 
more messages that tell  more of the story.
thanks for the reply though, it was very informative.
is there a reason my AP would be in power saving mode?  it isn't a laptop 
and is plugged in, so i don't really care about this.  if i could set it 
out of power saving mode, that would be fine w/ me.

thx,
doug

At 09:45 AM 12/07/2002 -0800, you wrote:
>On Sat, Dec 07, 2002 at 10:35:46AM -0500, Doug Yeager wrote:
>
> > i have a few AP's in downtown knoxville serving coffee houses. i review 
> the
> > dmesg logs frequently to see what is going on. every now and then i get
> > this log messages. usually follows a resetting of the AP card.
>
>That indicates that the number of buffered frames for power saving
>station exceeded limit of 32 frames. Usually, this would mean that the
>station has started to use power saving mode, but is not sending PS poll
>frames to request the buffered frames.
>
>If this happens just after resetting the AP card, it might be possible
>that the buffer was already full before reset and after reset a TIM bit
>in beacon is not set. This bit is used by the station as an indication
>of buffered frames. Current driver code does not setup TIM bits after
>reset and this might end up in state where no frame in AP->STA direction
>is able to trigger PS polling. I will fix the reset code to setup TIM
>configuration, so that this kind of situation could be avoided. I'm not
>sure whether this will fix your case, but it might.
>
>--
>Jouni Malinen                                            PGP id EFC895FA
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