Wi-Fi and RFID Convergence

We're seeing another trend emerge - the convergence of active RFID
and Wi-Fi.Active RFID involves tags with an energy source that emit a
signal to readers some distance away.It's provides almost precise
location of tags by coordinates within a particular physical
space,designed for use in-inside neighboring open spaces,as parking
lots or courtyards.

http://flying-rugs.com/wi-fi-and-rfid/