# US 9,436,859 B2 · Ad hoc localization using a movable reader and movable id tags

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- Number: US 9,436,859 B2
- Document ID: US9436859B2
- Status: Granted
- Kind: B2
- Application number: 14/500,096
- Filed: 2014-09-29
- Published: 2016-03-31
- Granted: 2016-09-06
- Earliest claimed: 2014-09-29
- Assignees: Globalfoundries Inc.
- Applicants: Globalfoundries Inc.
- Inventors: Zachary A. Burns; Yuk L. Chan; Kin K. Choi; David J. B. Flaherty
- Web page: https://patentgrep.com/patent/US9436859B2

## CPC

- G06K 7/10366: {the interrogation device being adapted for miscellaneous applications}
- G01S 11/02: using radio waves (G01S19/00 takes precedence)
- G01S 13/75: using transponders powered from received waves, e.g. using passive transponders {, or using passive reflectors}
- 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)}
- G08B 13/2462: {Asset location systems combined with EAS (inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00)}
- G01S 2201/01: adapted for specific applications or environments
- 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}
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## 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

### Claim 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 from one location to another location; and
the method further comprising: using the movable reader to:
determine a localization probability score of said ID tag; and
based on said localization probability score, adjusting a determination by said movable reader of said presence of said ID tag.

### Claim 2

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.

### Claim 3 (depends on 2)

The object ID system of claim 2, 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.

### Claim 4 (depends on 2)

The object ID system of claim 2, wherein said first localization probability score is based on:
said first current location of said movable reader;
a distance between said movable reader and said first trigger zone; and
a distance between said movable reader and said first miss zone.

### Claim 5 (depends on 2)

The object ID system of claim 2, 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.

### Claim 6 (depends on 2)

The object ID system of claim 2, wherein said movable reader comprises a remote host computer.

### Claim 7 (depends on 2)

The object ID system of claim 2, wherein said movable reader comprises an integrated host computer.

### Claim 8 (depends on 2)

The object ID system of claim 2, 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.

### Claim 9 (depends on 8)

The object ID system of claim 8, 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.

### Claim 10 (depends on 8)

The object ID system of claim 8, 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.

### Claim 11 (depends on 2)

The object ID system of claim 2, 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.

### Claim 12 (depends on 11)

The object ID system of claim 11, wherein said movable reader is further configured to determine a verification of said potential localization of said first ID tag.

### Claim 13 (depends on 12)

The object ID system of claim 12, 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.

### Claim 14 (depends on 13)

The object ID system of claim 13, wherein said movable reader is further configured to utilize data of said trilateration process to limit a scope of said directional read process.

### Claim 15 (depends on 12)

The object ID system of claim 12, 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.

### Claim 16 (depends on 15)

The object ID system of claim 15, 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.

### Claim 17 (depends on 15)

The object ID system of claim 15, 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 localization 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.

### Claim 18

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 communications network, stored data of said second movable reader to define, adjust and track said first trigger zone of said first ID tag.

### Claim 19 (depends on 18)

The object ID system of claim 18, wherein said second movable reader is configured to access and utilize, through said communications network, stored data of said first movable reader to define, adjust and track said first trigger zone of said first ID tag.