On Fri, 2008-11-21 at 15:12 +0100, Stefan Steuerwald wrote: > - frame 7: http request > - frame 13: iPod goes to sleep > - frame 23: AP beacon indicates traffic for iPod (AID 1 in TIM) in 24 too, the ipod probably didn't see the beacon in frame 23 even though 23 was a dtim beacon (which is a bit odd, but maybe the ipod doesn't care about mcast at this point) > - frame 25: iPod wakes up 26: ack from the AP > - in between: MISSING DATA ??? > - frame 27: AP beacon with no traffic indicated ??? > - frame 29: iPod goes to sleep again > - subsequent frames: repetitions of this, until the TCP connection is closed > > My understanding is that the AP would not indicate any traffic without > actually having some ready to send? Wrong assumption? Indeed. Christian, is it possible that the p54 device is actually filtering these frames? I'm pretty sure mac80211 behaves correctly, and it unsetting the TIM bit means that it must no longer have traffic buffered. johannes
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