The accuracy and reliability of tracking and locating is increased by using a unique combination of at least two locating technologies. This may be done while reducing the costs for achieving a given level of accuracy and reliability, leveraging existing standard technologies, delivering room level location accuracy, providing choke point capabilities, providing RTLS capability minimizing additional infrastructure costs and maintenance costs, and/or increasing battery life of tags. Information for locating a tag within a region, the region including a plurality of zone or boundary identifier transmitters and a plurality of access points may be combined by (a) receiving by the tag, from one of the zone or boundary identifier transmitters, a zone or boundary identifier, (b) transmitting by the tag, information identifying the zone or boundary identifier and a tag identifier associated with the tag, over at least two channels, (c) receiving, by at least two of the access points, the information identifying the zone or boundary identifier and a tag identifier associated with the tag, transmitted by the tag, (d) transmitting, by each of the at least two access points, the information identifying the zone or boundary identifier and a tag identifier associated with the tag, as well as secondary information for use in deriving a location of the tag, and (e) storing the zone or boundary identifier and the tag identifier associated with the tag, and the secondary information, in association with one another.

Title
Tags and tag-based systems and methods for locating and tracking objects
Application Number
PCT/US2009/036910
Publication Number
2009/114666
Publication Date
September 17, 2009
Inventor
Lazzaro Gerard M
Sugla Binay
Agent
POKOTYLO John C
Assignee
Lazzaro Gerard M
Sugla Binay
Vestac
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