METHODS AND APPARATUS FOR LOCATING AN RFID READER USING RFID TAGS

• US 20090085741A1
• Filed: 09/27/2007
• Published: 04/02/2009
• Est. Priority Date: 09/27/2007
• Status: Abandoned Application

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: MALIK, Ajay, RAVI, Ranjith, MOGHE, Shilpa, BHARGAVA, Saurabh
• Application Number:
  US11/863,044
• Publication Number:
  US 20090085741A1
• Time in Patent Office: Days
• US Class Current: 340/572.100
• CPC Class Codes: G01S 1/68 Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
• CPC Class Codes: G01S 13/876 Combination of several spaced transponders or reflectors of known location for determining the position of a receiver G01S13/874 takes precedence
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: G08B 13/2462 Asset location systems combined with EAS inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00
• CPC Class Codes: G08B 21/0275 Electronic Article Surveillance [EAS] tag technology used for parent or child unit, e.g. same transmission technology, magnetic tag, RF tag, RFID

Abstract

Methods and systems are provided for determining the location of an RFID reader within an environment having a plurality of RFID tags located therein. One method includes activating a tag via an RFID reader and receiving data from an RFID tag. The method also includes transmitting the data from the reader to an access port and determining the location of the reader based on the data. A system includes an RFID tag configured to transmit data when activated by an RFID reader. Furthermore, the system includes an access port configured to receive the data from the reader and a module configured to receive the data and determine the location of the reader based on the data. One RFID reader includes means for activating an RFID tag including data identifying a location of the tag, means for receiving the data, and means for transmitting the data to an access port.

Claims

1. A method for determining the location of an RFID reader within a site having a plurality of RFID tags located therein, the method comprising:

activating a first RFID tag via the RFID reader;

receiving, via the RFID reader, first data from the first RFID tag;

transmitting the first data from the RFID reader to a first access port; and

determining the location of the RFID reader based on the first data.

2. The method of claim 1, wherein activating the first RFID tag comprises activating one of an active RFID tag and a passive RFID tag.

3. The method of claim 1, wherein receiving data acquired from the first RFID tag comprises receiving predetermined location information associated with the first RFID tag.

4. The method of claim 1, further comprising providing a graphical representation of the location of the RFID reader on a display.

5. The method of claim 1, further comprising transmitting the first data to a wireless switch in communication with the first access port.

6. The method of claim 5, further comprising transmitting the first data to a central office in communication with the wireless switch.

7. The method of claim 1, wherein determining the location comprises determining the location utilizing a module in communication with the first access port.

8. The method of claim 1, further comprising:

activating a second RFID tag via the RFID reader;

receiving, via the RFID reader, second data from the second RFID tag;

transmitting the second data from the RFID reader to a second access port; and

determining the location of the RFID reader based on the second data.

9. The method of claim 8, wherein determining the location comprises determining the location utilizing a module in communication with the first access port and the second access port.

10. The method of claim 8, further comprising:

transmitting the first data and the second data to a wireless switch in communication with the first access port and the second access port; and

transmitting the first data and the second data to a central office in communication with the wireless switch.

11. A system for determining the location of an RFID reader within a site, comprising:

a first RFID tag located within the site, the first RFID tag configured to transmit first data when activated by the RFID reader;

a first access port configured to receive the first data from the RFID reader; and

a module in communication with the first access port, the module configured to determine the location of the RFID reader based on the first data.

12. The system of claim 11, wherein the first RFID tag is configured to receive power from the RFID reader.

13. The system of claim 11, wherein the first data comprises predetermined location information associated with the first RFID tag.

14. The system of claim 11, further comprising a display in communication with the module, the display configured to provide a graphical representation of the location of the RFID reader.

15. The system of claim 11, further comprising a wireless switch in communication with the first access port, the wireless switch configured to receive the first data from the first access port.

16. The system of claim 15, further comprising a central office in communication with the wireless switch, the central office configured to receive the first data from the first access port.

17. The system of claim 11, further comprising:

a second RFID tag located within the site, the second RFID tag configured to transmit second data when activated by the RFID reader; and

a second access port configured to receive the second data from the RFID reader, wherein the module is further configured to determine the location of the RFID reader based on the second data.

18. An RFID reader, comprising:

means for activating a first RFID tag, the first RFID tag including first data identifying a location of the first RFID tag;

means for receiving the first data from the first RFID tag; and

means for transmitting the first data to a first access port.

19. The RFID reader of claim 18, wherein the activating means comprises means for activating one of an active RFID tag and a passive RFID tag.

20. The RFID reader of claim 18, further comprising:

means for activating a second RFID tag, the second RFID tag including second data identifying a location of the second RFID tag;

means for receiving the second data from the second RFID tag; and

means for transmitting the second data to a second access port.