Configuration management system and method for use in an RFID system including a multiplicity of RFID readers

• US 20070099623A1
• Filed: 10/16/2006
• Published: 05/03/2007
• Est. Priority Date: 10/17/2005
• Status: Active Grant

• Current Assignee: Quake Global, Inc.
• Original Assignee: Reva Systems Corp. (Quake Global, Inc.)
• Inventors: Zhou, Lin, Grady, Michael, Krishna, Pattabhiraman, Barvick, Scott, Shah, Nirav, Fischer, Jeffrey, Cabot, Chilton, Husak, David, Stephensen, Robert
• Granted Patent: US 7,567,179 B2
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A system and method that facilitates the configuration and control of components of an RFID system, taking into account how the RFID system components are associated with one or more physical locations within an environment in which the RFID system is deployed. A user provides information specifying associations between the system components and the physical locations within the environment to obtain visual representations of configuration data generated therefrom with reference to a facility view, an RF coverage view, and a location view of the data. The facility view serves as a reference plane for placement and orientation of antennas associated with RFID readers, location benchmark tags, and the physical locations of interest. After each antenna is placed and oriented on the facility view, an estimate of the size and shape of the RF interrogation zone of each antenna is computed, and representations of the RF interrogation zones are provided on the facility view to obtain the RF coverage view of the data. Next, the user provides information specifying the physical locations of interest to obtain the location view of the data. A composite of the facility view, the coverage view, and the location view is then generated to obtain an enhanced visual understanding of how the system components and the physical locations exist within the system environment, and how the components and locations are associated with one another.

Claims

1. A method of generating information for use in configuration and control of a radio frequency identification (RFID) tag data acquisition system, said system including at least one RFID tag, at least one RF transmitter, at least one RF receiver, and at least one real-time controller for controlling said at least one RF transmitter and said at least one RF receiver, said at least one RF transmitter and said at least one RF receiver having at least one antenna associated therewith, each antenna having an associated RF interrogation zone, said method comprising the steps of:

obtaining a representation of a physical space in which the RFID tag data acquisition system is to be deployed;

in a first specifying step, specifying a plurality of regions within said representation of said physical space;

in a second specifying step, specifying a location of each antenna within said representation of said physical space so that at least a portion of at least one of said plurality of regions is within the RF interrogation zone associated with the respective antenna; and

compiling information derived from said first and second specifying steps into at least one data file, for use by said at least one real-time controller in controlling said at least one RF transmitter for interrogating at least one RFID tag disposed within said at least a portion of at least one region within said physical space, and in controlling said at least one RF receiver for receiving RFID tag data generated by said at least one RFID tag in response to being interrogated by said at least one RF transmitter.

2. The method of claim 1 including the step of assigning at least one property to each antenna.

3. The method of claim 2 wherein said at least one property assigned to each antenna is selected from the group consisting of a pattern, an orientation, an elevation, an azimuth, a transmit power, a tag sensitivity level for at least one RFID tag disposed within the RF interrogation zone associated with the respective antenna, a tag range value for at least one RFID tag disposed within the RF interrogation zone associated with the respective antenna, and an indication of a propagation path for at least one RFID tag disposed within the RF interrogation zone associated with the respective antenna.

4. The method of claim 3 including the step of estimating at least one of a size and a shape of the RF interrogation zone associated with the respective antenna based at least in part upon the pattern and the transmit power assigned to the respective antenna.

5. The method of claim 4 including the step of providing a visual indication of said plurality of regions, the location of each antenna, and the size and the shape of the RF interrogation zone associated with each antenna within said representation of said physical space.

6. The method of claim 1 including the step of assigning at least one property to each of said plurality of regions.

7. The method of claim 6 wherein said at least one property assigned to each of said plurality of regions is selected from the group consisting of a name of the respective region, a description of the respective region, a tag filter specification for the respective region, a priority level for the respective region, a tag pace value for the respective region, a tag range value for the respective region, and a tag flux level for the respective region.

8. The method of claim 1 including, in a third specifying step, specifying a location of at least one location benchmark tag within said representation of said physical space.

9. The method of claim 1 wherein said first specifying step includes specifying said plurality of regions within said representation of said physical space, each of said plurality of regions having a 2-dimensional geometrical shape.

10. The method of claim 1 wherein said first specifying step includes specifying said plurality of regions within said representation of said physical space, each of said plurality of regions having a 3-dimensional geometrical shape.

11. The method of claim 1 wherein said first specifying step includes specifying said plurality of regions within said representation of said physical space so that at least two of said plurality of regions intersect one another.

12. The method of claim 1 wherein said first specifying step includes specifying said plurality of regions within said representation of said physical space so that at least two of said plurality of regions overlap one another.

13. The method of claim 1 wherein said first specifying step includes specifying said plurality of regions within said representation of said physical space so that at least one first region is wholly contained within at least one second region.

14. The method of claim 1 wherein said second specifying step includes specifying the location of each antenna within said representation of said physical space so that at least two of said RF interrogation zones overlap one another.

15. The method of claim 14 including the step of estimating a location of at least one RFID tag disposed within the overlap of said at least two RF interrogation zones by combining information derived from tag interrogations occurring within the overlap of the at least two RF interrogation zones.

16. The method of claim 1 wherein at least one RF transmitter and at least one RF receiver are embodied in at least one mobile RFID reader, and including, in a third specifying step, specifying at least one path within said representation of said physical space that said at least one mobile RFID reader can take as it traverses said physical space.

17. The method of claim 1 wherein at least one RF transmitter and at least one RF receiver are embodied in at least one mobile RFID reader, and including, in a third specifying step, translating an in-place coverage zone associated with said at least one mobile RFID reader with reference to at least one location benchmark tag and said plurality of regions within said representation of said physical space to indicate at least one region within said physical space in which said at least one mobile RFID reader can interrogate at least one RFID tag.

18. The method of claim 1 wherein at least one RF transmitter and at least one RF receiver are embodied in at least one mobile RFID reader, and including, in a third specifying step, specifying at least one location of interest along at least one path within said representation of said physical space that said at least one mobile RFID reader can take as it traverses said physical space.

19. The method of claim 1 wherein said first specifying step includes identifying at least one incident plane associated with at least one of said plurality of regions within said representation of said physical space, said at least one incident plane being at least one horizontal plane corresponding to at least one boundary of said plurality of regions.

20. The method of claim 19 wherein said second specifying step includes providing at least one indication of at least one RF coverage projection of at least one antenna on said at least one incident plane.

21. The method of claim 20 wherein said at least one RF coverage projection comprises a plurality of RF coverage projections, and wherein at least two indications of said plurality of RF coverage projections on said at least one incident plane overlap to form at least one connected reader set.

22. A computer system for generating information for use in configuration and control of a radio frequency identification (RFID) tag data acquisition system, said RFID tag data acquisition system including at least one RFID tag, at least one RF transmitter, at least one RF receiver, and at least one real-time controller for controlling said at least one RF transmitter and said at least one RF receiver, said at least one RF transmitter and said at least one RF receiver having at least one antenna associated therewith, each antenna having an associated RF interrogation zone, said computer system comprising:

at least one memory; and

at least one processor operative to execute at least one computer program out of said at least one memory, said computer program being operative to;

obtain a representation of a physical space in which the RFID tag data acquisition system is to be deployed;

specify a plurality of regions within said representation of said physical space;

specify a location of each antenna within said representation of said physical space so that at least a portion of at least one of said plurality of regions is within the RF interrogation zone associated with the respective antenna; and

compile information derived from said plurality of specified regions and the specified location of each antenna within said representation of said physical space into at least one data file, for use by said at least one real-time controller in controlling said at least one RF transmitter for interrogating at least one RFID tag disposed within said at least a portion of at least one region within said physical space, and in controlling said at least one RF receiver for receiving RFID tag data generated by said at least one RFID tag in response to being interrogated by said at least one RF transmitter.

23. The computer system of claim 22 including at least one display, and wherein said computer program is operative to allow a human operator to specify, on said at least one display, said plurality of regions and the location of each antenna within said representation of said physical space.

24. The computer system of claim 23 wherein said computer program is operative to allow a human operator to specify, on said at least one display, said plurality of regions and the location of each antenna within said representation of said physical space via a graphical user interface.

25. The computer system of claim 22 wherein said computer program is operative to estimate at least one of a size and a shape of the RF interrogation zone associated with the respective antenna based at least in part upon a pattern and a transmit power associated with the respective antenna.

26. The computer system of claim 25 including at least one display, and wherein said computer program is operative to provide, on said at least one display, a visual indication of said plurality of regions, the location of each antenna, and the size and the shape of the RF interrogation zone associated with each antenna within said representation of said physical space.