AD HOC LOCALIZATION USING A MOVABLE READER AND MOVABLE ID TAGS

• US 20160092708A1
• Filed: 09/29/2014
• Published: 03/31/2016
• Est. Priority Date: 09/29/2014
• Status: Active Grant

• Current Assignee: Globalfoundries US Incorporated (GlobalFoundries, Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Burns, Zachary A., Chan, Yuk L., Choi, Kin K., Flaherty, David J.B.
• Granted Patent: US 9,436,859 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 11/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 13/75 using transponders powered from received waves, e.g. using passive transponders , or using passive reflectors
• CPC Class Codes: G01S 2201/01 adapted for specific applications or environments
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• 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

Embodiments are directed to a method of identifying an identification (ID) tag. The method includes using a movable reader to determine a presence of an ID tag, an absence of the ID tag and that the ID tag has moved. The method further includes using the movable reader to determine a localization probability score of the ID tag, and, based on the localization probability score, adjust the movable reader'"'"'s determination of the presence of the ID tag.

Claims

1. A method of performing an object identification (ID), the method comprising:

using a movable reader to determine;

a presence of an ID tag;

an absence of said ID tag; and

that said ID tag has moved.

2. The method of claim 1, further comprising:

using the movable reader to;

determine a localization probability score of said ID tag; and

based on said localization probability score, adjusting said movable reader'"'"'s determination of said presence of said ID tag.

3. An object identification (ID) system comprising;

a movable reader configured to define, adjust and track a first trigger zone of a first ID tag by determining a presence of said first ID tag within said first trigger zone;

said movable reader further configured to define, adjust and track a first miss zone of said first ID tag by determining an absence of said first ID tag from said first miss zone; and

said movable reader further configured to determine a first localization probability score of said first ID tag;

wherein said first localization probability score comprises a likelihood that said movable reader will, while at a first current location, determine said presence of said first ID tag.

4. The object ID system of claim 3, wherein said movable reader is further configured to, based on said first localization probability score, make a first adjustment to said movable reader determining said presence of said first ID tag.

5. The object ID system of claim 3, wherein said first localization probability score is based on:

said first current location of said movable reader;

a distance between said moveable reader and said first trigger zone; and

a distance between said movable reader and said first miss zone.

6. The object ID system of claim 3, further comprising:

a mobile device capable of ad hoc, unscripted movements from one location to another location; and

said movable reader further configured to be incorporated with said mobile device;

wherein said determination of said presence of said first ID tag within said first trigger zone is accomplished during said ad hoc, unscripted movements from one location to another location.

7. The object ID system of claim 3, wherein said movable reader comprises a remote host computer.

8. The object ID system of claim 3, wherein said movable reader comprises an integrated host computer.

9. The object ID system of claim 3, further comprising;

said movable reader further configured to define, adjust and track a second trigger zone of a second ID tag by determining a presence of said second ID tag within said second trigger zone;

said movable reader further configured to define, adjust and track a second miss zone of said second ID tag by determining an absence of said second ID tag from said second miss zone; and

said movable reader further configured to determine a second localization probability score of said second ID tag;

wherein said second localization probability score comprises a likelihood that said movable reader will, while at a second current location, determine said presence of said second ID tag.

10. The object ID system of claim 9, wherein said movable reader is further configured to, based on said second localization probability score, make a second adjustment to said movable reader determining said presence of said second ID tag.

11. The object ID system of claim 9, wherein said movable reader is further configured to, based on a comparison between said first localization probability score and said second localization probability score, prioritize determining said presence of said first ID tag over determining said presence of said second ID tag.

12. The object ID system of claim 3, wherein said movable reader is further configured to determine a potential localization of said first ID tag by said determination of said presence of said first ID tag within said first trigger zone.

13. The object ID system of claim 12, wherein said movable reader is further configured to determine a verification of said potential localization of said first ID tag.

14. The object ID system of claim 13, wherein said movable reader is further configured to:

determine said potential localization of said first ID tag by a trilateration process; and

determine said verification of said potential localization of said first ID tag by a directional read process.

15. The object ID system of claim 14, wherein said movable reader is further configured to utilize data of said trilateration process to limit a scope of said directional read process.

16. The object ID system of claim 13, wherein said movable reader is further configured to:

determine that said verification of said potential localization is no longer accurate; and

initiate a new search for a new presence of said first ID tag.

17. The object ID system of claim 16, wherein said movable reader is further configured to:

determine a presence of said first ID tag within a new first trigger zone;

determine that said new first trigger zone overlaps said first trigger zone;

determine a new potential localization of said first ID tag within said new first trigger zone; and

determine a verification of said new potential localization of said first ID tag.

18. The object ID system of claim 16, wherein said movable reader is further configured to:

determine a presence of said first ID tag within a new first trigger zone;

determine that said new first trigger zone does not overlap said first trigger zone;

define, adjust and track said new first trigger zone of said first ID tag by determining a presence of said first ID tag within said new first trigger zone;

define, adjust and track a new first miss zone of said first ID tag by determining an absence of said first ID tag from said new first miss zone; and

determine a new first localization probability score of said first ID tag;

wherein said new first probability score comprises a likelihood that said movable reader will, while at a new first current location, determine said presence of said first ID tag.

19. An object identification (ID) system, comprising:

a first movable reader configured to define, adjust and track a first trigger zone of a first ID tag by determining a presence of said first ID tag within said first trigger zone;

a second movable reader configured to define, adjust and track said first trigger zone of said first ID tag by determining said presence of said first ID tag within said first trigger zone; and

a communications network connecting said first movable reader and said second movable reader;

wherein said first movable reader is further configured to access and utilize, through said network, stored data of said second movable reader to define, adjust and track said first trigger zone of said first ID tag.

20. The object ID system of claim 19, wherein said second movable reader is configured to access and utilize, through said network, stored data of said first movable reader to define, adjust and track said first trigger zone of said first ID tag.