Is 802.11n rate control being worked on?

[John Nielsen]

I am working on a network scenario which would benefit greatly from the MIMO features and higher bandwidth of 802.11n. It's my understanding that 11n is not fully supported in FreeBSD since there is no appropriate rate control algorithm in the tree. Is that still the case?

I would _really_ like to run FreeBSD for this project, and I believe the Atheros wireless cards I plan to use are supported by ath(4). I'd like to find out what else needs to happen to complete the picture. I may even go so far as to write some code myself. :)

Is anyone working on this at the moment?

Is it just the rate control that needs to be done or are there other parts involved? Is MIMO separate?

Is there a detailed description of the missing pieces somewhere? Or a not-very-detailed summary of where to look and what to read to get started?

Thanks,

JN