System for determining location of electronic price labels...

Details System for determining location of electronic price labels... System for determining location of electronic price labels...

G - Physics

01

S

G01S 13/74 (2006.01)

Patent

CA 2175032

A method of locating an electronic price label in transaction establishments which is based on signal strength measurements. A plurality of receiving antennae are provided for receiving a message from the electronic price label. The location of the electronic price label is determined with reference to the receiving antennae. A computer transmits a query message to the electronic price label. The computer listens for an acknowledgment message from the electronic price label. The computer determines the signal strengths of the acknowledgment message at each of the receiving antennae. The computer determines an estimate of the location of the electronic price label from the signal strengths.

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