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Note: Atheros AR5001X+ chipset cards (don't know about all of the rest), do this thing where instead of staying in PS mode, look for their AID in the TIM, the do PS-Polling, they flip the PM bit to 1, wait a VERY short time, and then flip it back to 0 (which will cause the AP to flood all queued frames). This process of flipping back to 0 is done arbitrarily and does NOT take into account what the client STA sees in the TIM about its own AID - trust me, I've checked that out.

This seems highly inefficient. The STA will have to send a null data frame to get data that might be there. Then it sends another null data frame to complete the process.

I love this type of stuff - "Ok students, this is what the standard says, but, a couple manufacturers do it this way, and a few other do it this way... " No confusion there. :)

Thanks for the reply Devin.