Searching for Enterprise Controller Documentation/Deployment

Is there a way to find out what enterprise controller are doing?
Cisco is releasing some papers and technical documentations.

I would like to find out what Aruba, Aerohive, AirTies, Airsonics, Cisco, ... are doing in their enterprise WiFis. How they deal with problems I am struggling with. Is anyone deploying such an Enterprise Network and would allow me a brief look into this systems?