Patent ID: 8514056

Claim:
A system for estimating a current position of an asset within a location, comprising: a transponder associated with said asset; a plurality of wireless interface devices provided within said location; and a central computer system in electronic communication with said wireless interface devices, said central computer system being adapted to: (i) identify a particular one or more of said wireless interface devices that have at least received a wireless signal from said transponder, and (ii) determine an estimate of said current position based on the identified particular one or more of said wireless interface devices, wherein said location includes a plurality of sub-locations, wherein each of said sub locations includes a set of said wireless interface devices, wherein in each said sub-location a particular one of the set of said wireless interface devices included in the sub-location is structured to determine a sub-min-term for said transponder, the sub-min-term for each sub-location representing a plurality of Boolean variable values, each of said Boolean variable values being associated with a respective one of the wireless interface devices of the set of said wireless interface devices included in the sub-location and indicating whether the one of said wireless interface devices has at least received a wireless signal from said transponder, wherein said central computer system receives one or more of the sub-min-terms and determines said estimate of said current position based on said one or more of the sub-min-terms.