Method and system for estimating a position of a target using a plurality of smartphones

• US 9,369,838 B2
• Filed: 12/21/2012
• Issued: 06/14/2016
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: Otodata Wireless Network Inc.
• Original Assignee: Otodata Wireless Network Inc.
• Inventors: Boulay, Andre, Gallovich, Jason M., Noel, Simon
• Primary Examiner(s): Karikari, Kwasi
• Application Number:
  US14/367,217
• Publication Number:
  US 20150005002A1
• Time in Patent Office: 1,271 Days
• Field of Search: 455/456.1
• US Class Current: 1/1
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/0072 Transmission between mobile stations, e.g. anti-collision systems
• CPC Class Codes: G01S 5/0294 Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering
• CPC Class Codes: G06Q 10/08 Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
• CPC Class Codes: G08B 21/24 Reminder alarms, e.g. anti-loss alarms
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04M 1/72463 to restrict the functionality of the device
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method is disclosed for estimating a position of a target using a plurality of smartphones, each smartphone being capable of communicating with the target over a limited wireless range, the method comprising providing a target transmitting a wireless signal having a corresponding identification for uniquely identifying the target; providing the corresponding identification of the target to track to a group of smartphones; each smartphone of the group of smartphones being capable of receiving the signal transmitted if the target is in its vicinity and storing the corresponding identification of the target with a time stamp and an indication of a corresponding location of the smartphone and obtaining each of the stored corresponding identifications of the target with a time stamp and an indication of a corresponding location of the smartphone to thereby estimate a position of the target.

Claims

1. A method for estimating a position of a target using a plurality of smartphones, each smartphone being capable of communicating with the target over a limited wireless range, the method comprising:

providing a target transmitting a wireless signal having a corresponding identification for uniquely identifying the target;

providing the corresponding identification of the target to track to a group of smartphones;

each smartphone of the group of smartphones being capable of receiving the signal transmitted if the target is in its vicinity and storing the corresponding identification of the target with a time stamp and an indication of a corresponding location of the smartphone;

obtaining each of the stored corresponding identification of the target with a time stamp and an indication of a corresponding location of the smartphone to thereby estimate a position of the target, wherein obtaining each of the stored corresponding identifications of the target with a time stamp and an identification of a corresponding location of the smartphone comprises determining a pertinent communication channel for transmitting each of the stored corresponding identification of the target with a time stamp and an identification of a corresponding location of the smartphone; and

wherein the providing of the corresponding identification of the target to track to a group of smartphones comprises determining a subset of smartphones and broadcasting a request for tracking the target to each smartphone of the subset of smartphones.

2. The method as claimed in claim 1, wherein each of the plurality of smartphones comprises a localization system.

3. The method as claimed in claim 2, wherein the localization system comprises at least one of a Global Positioning System (GPS) receiver and a Wifi™

hotspot mapping system.

4. The method as claimed in claim 1, wherein the wireless signal is a short-range wireless signal.

5. The method as claimed in claim 4, wherein the short-range wireless signal is transmitted according to a communication standard selected from a group consisting of Bluetooth™

and Wifi™

.

6. The method as claimed in claim 1, wherein the corresponding identification comprises a medium access control (MAC) address used by the target for transmitting said wireless communication signal.

7. The method as claimed in claim 1, wherein the identification for uniquely identifying the target comprises a modified medium access control (MAC) address.

8. The method as claimed in claim 1, wherein the determining of the subset of smartphones is performed according at least one criterion.

9. The method as claimed in claim 8, wherein the at least one criterion is selected from a group consisting of a determined rough estimation of a probable location of the target to track, a type of wireless communication signal supported by the target to track, a given group of users.

10. The method as claimed in claim 1, wherein the request for tracking the target comprises an identification of the target to track and at least one other parameter.

11. The method as claimed in claim 10, wherein the at least one other parameter comprises at least one of a description of the target, a command to disable the target and a command to turn the target off.

12. The method as claimed in claim 11 wherein the description of the target comprises at least one of a picture, a caption, model information and specification.

13. The method as claimed in claim 1, further comprising receiving a list of at least one target to track;

further determining if the corresponding identification of the target matches the list of at least one target to track and performing said storing if the corresponding identification of the target matches the list.

14. The method as claimed in claim 1, further comprising storing additional information selected from a group consisting of a target status and a user input information.

15. The method as claimed in claim 1, wherein the obtaining of each of the stored corresponding identification of the target with a time stamp and an indication of a corresponding location of the smartphone comprises receiving each of the stored corresponding identifications of the target with a corresponding time stamp and a corresponding indication of a location of the smartphone and filtering the stored corresponding identifications of the target using the corresponding time stamps to remove the stored corresponding identifications of the target having corresponding time stamps older than a given value and the stored corresponding indications of a location for which the corresponding time stamps are older than a given value.

16. The method as claimed in claim 1, wherein the determining is performed according to at least one criterion selected from a group comprising cost and availability.

17. The method as claimed in claim 1, wherein the pertinent communication channel is selected from a group consisting of Wifi™

, Bluetooth™ and

a cellular data network.

18. A method for estimating a position of a target using a plurality of smartphones, each smartphone being capable of communicating with the target over a limited wireless range, the method comprising:

providing a target transmitting a wireless signal having a corresponding identification for uniquely identifying the target;

providing the corresponding identification of the target to track to a group of smartphones;

each smartphone of the group of smartphones being capable of receiving the signal transmitted if the target is in its vicinity and storing the corresponding identification of the target with an indication of a corresponding location of the smartphone;

obtaining each of the stored corresponding identification of the target with an indication of a corresponding location of the smartphone to thereby estimate a position of the target, wherein obtaining each of the stored corresponding identifications of the target with a time stamp and an identification of a corresponding location of the smartphone comprises determining a pertinent communication channel for transmitting each of the stored corresponding identification of the target with a time stamp and an identification of a corresponding location of the smartphone; and

wherein the providing of the corresponding identification of the target to track to a group of smartphones comprises determining a subset of smartphones and broadcasting a request for tracking the target to each smartphone of the subset of smartphones.