Except you need to combine the waveforms of multiple access points, so the APs need to send the current radio profiles to a shared server, the server needs to receive the proxied information and generate the waveforms for each AP, then the waveforms need to get sent back to the APs and transmitted over the radios.

Obviously, this is not what they are referring to in the 1ms timing, but I don't know what it is they are referring to.