On Jan 1, 2013 6:50 PM, "Michael Richardson" wrote: > > > A comment was made a month ago or so about how long it takes wifi APs > to switch from transmitting (unicast) to one station to another. That > there was quite a large latency here, and that this was one reason that > the AP designers wanted large buffers to accmulate, so that the > switching time could be amortized over a larger number of packets. > > I'm looking for a definitive reference to this problem. > Will this be in the 802.11 specification, or is this an inherent problem > in the chipsets, not the physics? > I might be way of here, but to me this sounds like a-mpdu which is used to aggregate frames to get higher throughput. Thats in the specification, its in 802.11ac and I believe that it go introduced with 802.11n. It is there to mitigate the overhead of aquiring the channel.