Honeywell International Inc.

Patrick S Gonla

Soumitri N Kolavennu

Cleopatra Cabuz

A method and apparatus are provided for estimating the location of a portable device. The method includes providing a plurality of location anchor and enhanced location anchor transceivers within a region, each operating from respective predetermined locations, a portable transceiver measuring a signal parameter from the transceivers, a location engine determining a location of the portable transceiver based upon the signal measurements and the respective predetermined locations of the transceivers, each of the enhanced transceivers measuring a signal parameter from some of the location and other enhanced transceivers, the location engine calculating an estimated location for each of the plurality of enhanced transceivers and calculating a location error based upon the estimated location and predetermined location of the enhanced location anchor transceiver.

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Maplewood, MN, United States of America

Patrick S Gonla