Method for positioning a mobile terminal at the moment when a trigger event occurs

• US 10,656,285 B2
• Filed: 12/08/2014
• Issued: 05/19/2020
• Est. Priority Date: 12/08/2014
• Status: Active Grant

• Current Assignee: Trusted Positioning Inc. (TDK Corporation)
• Original Assignee: Trusted Positioning Inc. (TDK Corporation)
• Inventors: Berkovich, Gennadii Mihajlovich, Purto, Leonid Viktorovich, Sviridenko, Vladimir Aleksandrovich
• Primary Examiner(s): Nguyen, Chuong P
• Application Number:
  US15/534,213
• Publication Number:
  US 20170336516A1
• Time in Patent Office: 1,989 Days
• Field of Search: 3423573, 34235728, 34235731, 34235732
• CPC Class Codes: G01S 19/45 by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
• CPC Class Codes: G01S 19/47 the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial
• CPC Class Codes: G01S 19/485 whereby the further system is an optical system or imaging system
• CPC Class Codes: G01S 5/014 Identifying transitions between environments
• CPC Class Codes: G01S 5/015 between indoor and outdoor environments
• CPC Class Codes: G01S 5/017 Detecting state or type of motion
• CPC Class Codes: G01S 5/0264 at least one of the systems being a non-radio wave positioning system
• CPC Class Codes: G01S 5/0294 Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering
• CPC Class Codes: H04M 1/72457 according to geographic location
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities

Abstract

The invention relates to navigation, particularly, to detection of indoor and outdoor positions of mobile devices. Technical result of the invention is to improve the accuracy of mobile terminal position detection at time of occurrence of a specific trigger event and decrease of load on sensor, computing, communication and other resources of the mobile terminal at times when a trigger event occurs. Mobile terminal positioning technique at the trigger event moment, is characterized by the following sequence: receipt of series of readings of inertial and non-inertial sensors, identification of intervals, during which readings of at least one sensor generates a stationary process; then detection of at least one point of time, when at least one stationary process is replaced by another stationary process; then identification of parameters of at least one pattern of movement for at least one stationarity interval; then detection of at least one position of the mobile terminal according to readings of non-inertial sensors; estimation of mobile terminal path according to parameters of at least one pattern of movement and then of position corresponding to change of one stationary process to another; then detection of mobile terminal position at time corresponding to a specific trigger event.

Claims

1. A method for positioning a mobile terminal positioning at a trigger event moment, comprising:

providing at least one processor;

acquiring with the at least one processor inertial and non-inertial sensors readings for the mobile terminal and allocating time intervals during which a sequence of readings of at least one sensor generates a stationary process;

detecting with the at least one processor at least one time interval when at least one stationary process is replaced by another stationary process, wherein each stationary process represents a random process with different statistical characteristics describing movement of the mobile terminal;

detecting with the at least one processor parameters of minimum one movement pattern for at least one stationarity interval;

detecting with the at least one processor at least one position of the mobile terminal based on readings of non-inertial sensors;

estimating with the at least one processor a mobile terminal path according to parameters of at least one pattern of movement; and

detecting with the at least one processor a position corresponding to a transition time from one stationary process to another with the position of the mobile terminal at a time corresponding to a particular trigger event.

2. The method of claim 1 including detecting many potential options for at least two movement patterns.

3. The method of claim 2, wherein stationarity time intervals are contiguous.

4. The method of claim 3, wherein one stationarity interval corresponds to a pattern of vehicle movement and another stationarity interval corresponds to a pattern of pedestrian movement.

5. The method of claim 4, wherein a computed position of the mobile terminal is stored in the memory of the mobile terminal.

6. The method of claim 5, wherein after position detection a message is sent to the mobile terminal with information related to a location of the mobile terminal.

7. The method of claim 6, wherein after position detection a message is sent to the mobile terminal with information related to an occurred trigger event.

8. The method of claim 3, wherein one stationarity interval corresponds to a pattern of pedestrian movement without change of a vertical component of position, and another stationarity interval corresponds to a pattern of pedestrian movement with a change of vertical component of position.

9. The method of claim 8, wherein one stationarity interval corresponds to the pattern of pedestrian movement within horizontal room section, and the other stationarity interval corresponds to the pattern of pedestrian movement on the stairs or the escalator, or in elevator.

10. The method of claim 3, wherein at least one stationarity interval corresponds to a mobile terminal position in static mode.

11. The method of claim 3, wherein at least one stationarity interval corresponds to a mobile terminal position in a vehicle.

12. The method of claim 11, wherein the trigger event is a movement of the mobile terminal from outside the vehicle.

13. The method of claim 3, wherein one stationarity interval corresponds to an outdoor position of the user and another stationarity interval corresponds to an indoor position of the user.

14. The method of claim 1, wherein for at least one stationarity interval, a defined set of non-inertial sensors used for position detection is used.

15. The method of claim 1, wherein the inertial sensor comprises at least one of a gyroscope and an accelerometer.

16. The method of claim 1, wherein the non-inertial sensor comprises at least one of a magnetic field sensor, a compass, a pressure sensor, an image sensor, a microphone, a touch screen, Wi-Fi, BLE, NFC, 3G/LTE, and GPS/GNSS.