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AssigneeEtag Systems, Inc.
InventorNorman E. Moyer
Estimating the term…
Methods for efficiently querying and identifying multiple items on a communication channel are disclosed. The methods preferably use radio frequency identification with interrogation devices and systems that identify radio frequency identification transponders. A depth-first tree traversal protocol algorithm, including commands and symbols, preferably is used to more efficiently interrogate a plurality of transponders in a short amount of time. The communication channel may be an RFID communication channel or a wired communication channel. The time required to obtain the identification numbers of the objects may be made deterministic. The objects to be identified may be clothing, luggage, furniture, computers, parcels, vehicles, warehouse inventory, components on an assembly line or documents.
A method for identifying a plurality of objects via interrogation over a communication channel, wherein each object to be identified includes an identification number having a plurality of digits, wherein each object has the ability to communicate at least either first or second responses to indicate a value of each of the digits contained in its respective identification number and wherein each object is operative in response to a plurality of predetermined commands each characterized by a predetermined signal timing, the method comprising the steps of:
A method for identifying one of a plurality of objects via interrogation over a communication channel, wherein each object includes an identification number having a plurality of digits, wherein each object has the ability to communicate at least either first or second responses to indicate a value of each of the digits contained in its respective identification number and wherein each object is operative in response to a plurality of predetermined commands each characterized by a predetermined signal timing, the method comprising the steps of:
A method for identifying one of a plurality of objects via interrogation over a radio frequency communication channel based on a depth-first tree traversal protocol, wherein each object includes an identification number having a plurality of digits, wherein each object has the ability to communicate at least either first or second responses to indicate a value of each of the digits contained in its respective identification number and wherein each object is operative in response to a plurality of predetermined commands each characterized by a predetermined signal timing, the method comprising the steps of:
Dependencies are inferred from the claim text.