Importance

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Abstract

A wireless location system/method is disclosed having one or more location centers for locating mobile units. Mobile unit location requests can utilize Internet communication between a network of location centers. A plurality of mobile unit locating technologies may be used, including those based on: TOA, TDOA, GPS, locations of other mobile units in proximity of the mobile unit being located, indoor wireless signal detection units; and reduced coverage base stations. Location determination strategies disclosed: adapting and calibrating system performance according to environmental and geographical changes, using location signal data for enhancing a database of predictive location data, heuristically evaluating mobile unit estimates related to terrain, mobile unit velocity and path, and adjusting mobile unit location estimations adaptively or statistically. The system/method is useful for emergency calls, tracking, routing, people and animal location, including applications for confinement to and exclusion from certain areas.

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First Claim