Patent ID: 7551090
Filing Date: 2009-06-23
Classification: G06F,G06K,G06Q,G07C

Abstract:
1. An apparatus that employs radio frequency (RF) identifier (ID) transponder tags (RFID tags) within a data processing system, the apparatus comprising: a memory including instructions, and a processor, wherein the processor executes the instructions for: transmitting an interrogation signal or signals toward a person or an object with which a set of one or more RFID tags are physically associated; obtaining a first set of one or more RFID tag identifiers from an interrogation response signal or signals returned from the set of one or more RFID tags; performing a mathematical operation on the first set of one or more RFID tag identifiers to generate an RFID signature value; receiving a request to determine a physical location of the person or the object, wherein the request contains the RFID signature value; employing the RFID signature value as an identifier within the data processing system for the person or the object with respect to the request to determine the physical location of the person or the object; performing an interrogation operation in response to the request to determine the physical location of the person or the object; computing the physical location of the person or the object based on information within interrogation response signals that are received during the interrogation operation; and returning a response to report the physical location of the person or the object.