US 12,137,497 B2
System and method of tracking a mobile device
Joel Roberto Sotomayor, Aurora (CA); and Idris Soule Alaofe, Hamilton (CA)
Assigned to TRESPASS TRACKER LTD., Aurora (CA)
Appl. No. 17/642,418
Filed by TRESPASS TRACKER LTD., Aurora (CA)
PCT Filed Sep. 11, 2020, PCT No. PCT/CA2020/051227
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/046650, PCT Pub. Date Mar. 18, 2021.
Claims priority of provisional application 62/899,456, filed on Sep. 12, 2019.
Prior Publication US 2022/0369095 A1, Nov. 17, 2022
Int. Cl. H04M 3/00 (2024.01); H04W 8/06 (2009.01); H04W 8/18 (2009.01); H04W 12/121 (2021.01); H04W 12/63 (2021.01)
CPC H04W 8/18 (2013.01) [H04W 8/06 (2013.01); H04W 12/121 (2021.01); H04W 12/63 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A system for tracking mobile devices, the system comprising at least one processor and memory storing code which when executed by the at least one processor configure the at least one processor to:
receive a disassemble international mobile subscriber identity (IMSI) attach message from a base station, the disassemble IMSI attach message including an IMSI and a location area identity (LAI) associated with an identified mobile device;
identify the identified mobile device within a location area using the IMSI and LAI, wherein to determine the location area the at least one processor is configured to:
determine angles of arrival of the IMSI request message from the device to the at least two antennae that received the IMSI request message; and
determine approximate coordinates of the device based on the angles of arrival;
receive a decode and capture message from the base station, the decode and capture message including a temporary mobile subscriber identity (TMSI) and LAI associated with an unidentified mobile device; and identify the unidentified mobile device as being the identified mobile device within the location area.