System and method for configuring an RFID reader

• US 20060238302A1
• Filed: 12/13/2005
• Published: 10/26/2006
• Est. Priority Date: 04/21/2005
• Status: Abandoned Application

• Current Assignee: GSI Group Corporation (Novanta Inc.)
• Original Assignee: GSI Group Corporation (Novanta Inc.)
• Inventors: Enwall, Tim, Chan, Christopher, Loving, Sean, Majhi, Rohit
• Application Number:
  US11/301,396
• Publication Number:
  US 20060238302A1
• Time in Patent Office: Days
• US Class Current: 340/10.100
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Abstract

Systems and methods for configuring an RFID tag reader based upon one or more aspects of an environment of the RFID tag reader are disclosed. In one embodiment, a tag reader is deployed into an environment that includes readable RFID tags capable of storing dynamic data, and a characteristic of the environment of the tag reader is identified. Based upon the identified characteristic, the configuration of the tag reader is adjusted. In variations, the tag reader is configurable based upon information received from RFID tags. A method for enhancing RFID tag reading performance for example includes sending a first signal to each of a plurality of RFID tags. Information is received from at least one of the plurality of tags, at an RFID tag reader, and a configuration of the tag reader is adjusted based upon at least a portion of the received information.

Claims

1. A method for enhancing RFID tag reading performance comprising:

sending a first signal to each of a plurality of RFID tags;

receiving information from at least one of the plurality of RFID tags at an RFID tag reader; and

adjusting a configuration of the RFID tag reader based upon at least a portion of the received information.

2. The method of claim 1, wherein sending the first signal to the RFID tags and receiving the information from the RFID tags occur at substantially the same time.

3. The method of claim 1, wherein the plurality of RFID tags are RFID transponders.

4. The method of claim 3, wherein the RFID transponders include at least one category of device selected from the group consisting of surface acoustic wave (SAW) RFID tags, read-only RFID tags, read-write RFID tags, polymer RFID tags, printed electronic RFID tags, passive RFID tags, active RFID tags and RFID readers configured to operate as RFID tags.

5. The method of claim 1, wherein adjusting the configuration of the RFID tag reader is performed automatically.

6. The method of claim 5, wherein automatically adjusting the configuration of the RFID tag reader is performed by at least one component selected from the group consisting of tag reader software, tag reader hardware, host hardware, host software, tag software and tag hardware.

7. The method of claim 1 wherein adjusting the configuration of the RFID tag reader includes a user adjusting the configuration based upon the portion of the received information.

8. The method of claim 1 wherein adjusting the configuration of the RFID tag reader comprises:

sending a second signal to each of the plurality of RFID tags; and

adjusting an order in which the first signal and the second signal are sent in response to the information.

9. The method of claim 8, wherein adjusting includes adjusting the order based upon at least one category of information selected from the group consisting of information indicating that the plurality of RFID tags includes a greater quantity of a first tag-type than a second tag-type;

information contained in data of a payload of the tag;

information indicating a time, day, date and interval;

information detected on a web server; and

information based on the hardware of the reader.

10. The method of claim 1, wherein adjusting the configuration of the RFID tag reader includes adjusting a power of the first signal.

11. The method of claim 10, wherein adjusting the power of the first signal includes adjusting the power as a function of at least one of the parameters selected from the group consisting of a bit error rate of the received information;

spectral density of the first signal;

emission characteristics of the first signal;

a tag protocol of the first signal;

a modulation scheme of the first signal, and power settings utilized by other tag readers in close proximity to the RFID tag reader.

12. The method of claim 1, wherein receiving information comprises sampling the received information, and wherein adjusting the configuration of the RFID tag reader based upon received information from the RFID tags of comprises:

changing a sampling rate so as to modify a balance between a rate at which information may be received from one of the plurality of RFID tags with the maximum distance at which information may be received from the one of the plurality of RFID tags.

13. The method of claim 1 wherein sending the first signal to the plurality of RFID tags comprises modulating the first signal;

and

wherein adjusting the configuration of the RFID tag reader includes adjusting a modulation depth of the signal based upon the portion of the received information.

14. The method of claim 13, wherein adjusting the configuration includes adjusting the configuration based upon a desired performance characteristic selected from the group consisting of a maximum read range, maximum read reliability and minimum spurious emissions.

15. The method of claim 1, wherein the RFID tag reader includes a transceiver and an application module.