Patent ID: 8165034

Claim:
In a coverage area comprising a plurality of zones, each zone corresponding to a region within the coverage area and being associated with at least one access point, each access point transmitting a wireless signal, the signal strength of each access point determinable at the target, and a current zone list which is comprised of a set of zero or more zones in which the target resides, or is believed to reside, a method of determining a current physical location for a target, comprising: a) initializing a threshold signal strength margin; b) determining at least one winning access point, based on the determined signal strengths for each access point and a threshold signal strength margin; c) determining, based on the determined at least one winning access point, a consecutive non-winner count, wherein the consecutive non-winner count is the consecutive number of times the access point has not been a winning access point, and a exit sample requirement, whether the target has exited any zones; d) determining, based on the determined at least one winning access point, a consecutive winner count, wherein the consecutive winner count is the consecutive number of times the access point has been a winning access point, and a entry sample requirement, whether the target has entered any zones.