Patent ID: 8345653

Claim:
A system for distributed tag management, the system comprising: a plurality of tags comprising tag data; a set of tag readers to retrieve tag data, a plurality of tag readers in the set of tag readers comprising storage to store tag data and tag positions, each tag reader in the plurality of tag readers to receive signals from one or more tags and to calculate initial tag positions based on a measurement of the received signals and a position of the tag reader; and a set of access points, each access point to receive tag data from one or more tag readers in the set of tag readers, at least one access point in the set of access points comprising storage, the access point to (i) receive, from two tag readers in the plurality of tag readers, measurements of the received signals of a particular tag residing in an overlapping coverage area of the two tag readers, and (ii) calculate a revised position of the particular tag based on a differential calculation of the measurements received from said two tag readers.