System and method of automatically identifying mobile communication devices within the vicinity of a gunshot

• US 9,900,738 B2
• Filed: 12/16/2016
• Issued: 02/20/2018
• Est. Priority Date: 12/22/2015
• Status: Expired due to Fees

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Doherty, John Houston
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US15/381,234
• Publication Number:
  US 20170180926A1
• Time in Patent Office: 431 Days
• CPC Class Codes: G01S 2205/01 specially adapted for specific applications
• CPC Class Codes: G01S 5/06 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/12 takes precedence
• CPC Class Codes: G01S 5/22 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/28 takes precedence
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

Control systems and methods are disclosed for automatically identifying mobile communication devices located within a vicinity of a gunshot. The control system may discriminates gunshots from other environmental noise and determine the location of the gunshot from information provided by a set of acoustic sensors. Once the gunshot location is determined, the control system may automatically trigger activation of one or more cell site simulators located near the location of the gunshot to identify mobile communication devices within the vicinity. Further precision in identifying the locations of the mobile communication devices may be obtained by using information from radio frequency (RF) sensors that intercept wireless RF transmissions from the mobile communication devices communicating with the activated cell site simulator. The control system may be used as a tool identifying and tracking perpetrators of gun crime and may also be used to located witnesses who may otherwise not have come forward.

Claims

1. A method of automatically identifying mobile communication devices located within a vicinity of a gunshot, comprising:

determining a location of the gunshot based on information provided by a plurality of acoustic sensors that detect an acoustic signal generated by the gunshot;

activating a cell site simulator in response to determining the location of the gunshot, the activated cell site simulator having a wireless communication range that includes the location of the gunshot;

obtaining identifying information of one or more mobile communication devices communicating with the activated cell site simulator; and

providing the identifying information of the one or more mobile communication devices to an output device.

2. The method of claim 1, wherein activating the cell site simulator having the wireless communication range that includes the location of the gunshot comprises activating one of a plurality of cell site simulators that is located closest to the determined location of the gunshot.

3. The method of claim 1, wherein activating the cell site simulator causes the cell site simulator to broadcast a radio frequency (RF) signal to trigger a response from the one or more mobile communication devices to the cell site simulator that contains the identifying information of the respective mobile communication devices.

4. The method of claim 3, wherein the RF signal that is broadcast by the activated cell site simulator comprises a cell reselection offset that causes the one or more mobile communication devices to perform cell reselection with the activated cell site simulator.

5. The method of claim 1, further comprising:

determining a location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on information provided by a plurality of radio frequency (RF) sensors that intercept RF signals communicated from the plurality of mobile communication devices to the activated cell site simulator; and

providing to the output device the identifying information of at least one of the one or more mobile communication devices that is determined to be located within a defined geographic region that includes the location of the gunshot.

6. The method of claim 5, wherein determining the location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on the information provided by the plurality of RF sensors comprises determining the location of each mobile communication device based on differences in arrival time, phase, or amplitude of an RF signal received at the activated cell site simulator and intercepted by the plurality of RF sensors.

7. The method of claim 1, wherein determining the location of the gunshot based on the information provided by the plurality of acoustic sensors comprises determining the location of the gunshot based on differences in arrival time, phase, or amplitude of the acoustic signal detected at the plurality of acoustic sensors.

8. The method of claim 7, further comprising determining the differences in arrival time, phase, or amplitude of the acoustic signal detected at the plurality of acoustic sensors based on respective digital representations of the acoustic signal provided by the plurality of acoustic sensors.

9. The method of claim 1, wherein the identifying information comprises an identifier that uniquely identifies a subscriber of a respective mobile communication device, the device itself, or any combination thereof.

10. A computing device for automatically identifying mobile communication devices located within a vicinity of a gunshot, comprising:

a processor configured with processor-executable instructions to;

determine a location of the gunshot based on information provided by a plurality of acoustic sensors that detect an acoustic signal generated by the gunshot;

activate a cell site simulator in response to determining the location of the gunshot, the activated cell site simulator having a wireless communication range that includes the location of the gunshot;

obtain identifying information of one or more mobile communication devices communicating with the activated cell site simulator; and

provide the identifying information of the one or more mobile communication devices to an output device.

11. The computing device of claim 10, wherein to activate the cell site simulator having the wireless communication range that includes the location of the gun shot, the processor is further configured with the processor-executable instructions to activate one of a plurality of cell site simulators that is located closest to the determined location of the gunshot.

12. The computing device of claim 10, wherein activating the cell site simulator causes the cell site simulator to broadcast a radio frequency (RF) signal to trigger a response from the one or more mobile communication devices to the cell site simulator that contains the identifying information of the respective mobile communication devices.

13. The computing device of claim 12, wherein the RF signal that is broadcast by the activated cell site simulator comprises a cell reselection offset that causes the one or more mobile communication devices to perform cell reselection with the activated cell site simulator.

14. The computing device of claim 10, wherein the processor is further configured with the processor-executable instructions to:

determine a location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on information provided by a plurality of radio frequency (RF) sensors that intercept RF signals communicated from the plurality of mobile communication devices to the activated cell site simulator; and

provide to the output device the identifying information of at least one of the one or more mobile communication devices that is determined to be located within a defined geographic region that includes the location of the gunshot.

15. The computing device of claim 14, wherein to determine the location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on the information provided by the plurality of RF sensors, the processor is further configured with the processor-executable instructions to determine the location of each mobile communication device based on differences in arrival time, phase, or amplitude of an RF signal received at the activated cell site simulator and intercepted by the plurality of RF sensors.

16. The computing device of claim 10, wherein the identifying information comprises an identifier that uniquely identifies a subscriber of a respective mobile communication device, the device itself, or any combination thereof.

17. A non-transitory processor-readable storage medium having stored thereon processor-executable instructions configured to cause a processor of a computing device to perform operations comprising:

determining a location of a gunshot based on information provided by a plurality of acoustic sensors that detect an acoustic signal generated by the gunshot;

activating a cell site simulator in response to determining the location of the gunshot, the activated cell site simulator having a wireless communication range that includes the location of the gunshot;

obtaining identifying information of one or more mobile communication devices communicating with the activated cell site simulator; and

providing the identifying information of the one or more mobile communication devices to an output device.

18. The non-transitory processor-readable storage medium of claim 17, wherein the stored processor-executable instructions are configured to cause a processor of a computing device to perform operations further comprising:

determining a location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on information provided by a plurality of radio frequency (RF) sensors that intercept RF signals communicated from the plurality of mobile communication devices to the activated cell site simulator; and

providing to the output device the identifying information of at least one of the one or more mobile communication devices that is determined to be located within a defined geographic region that includes the location of the gunshot.

19. A computing device for automatically identifying mobile communication devices located within a vicinity of a gunshot, comprising:

means for determining a location of the gunshot based on information provided by a plurality of acoustic sensors that detect an acoustic signal generated by the gunshot;

means for activating a cell site simulator in response to determining the location of the gunshot, the activated cell site simulator having a wireless communication range that includes the location of the gunshot;

means for obtaining identifying information of one or more mobile communication devices communicating with the activated cell site simulator; and

means for providing the identifying information of the one or more mobile communication devices to an output device.

20. The computing device of claim 19, further comprising:

means for determining a location for each of the one or more mobile communication devices communicating with the activated cell site simulator based on information provided by a plurality of radio frequency (RF) sensors that intercept RF signals communicated from the plurality of mobile communication devices to the activated cell site simulator; and

means for providing to the output device the identifying information of at least one of the one or more mobile communication devices that is determined to be located within a defined geographic region that includes the location of the gunshot.