Method and apparatus for movement detection by evaluating elementary movement patterns

• US 9,398,536 B2
• Filed: 05/29/2009
• Issued: 07/19/2016
• Est. Priority Date: 05/29/2009
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Czompo, Joseph, Seibert, Cristina A.
• Primary Examiner(s): LEE, JUSTIN YE
• Application Number:
  US12/475,255
• Publication Number:
  US 20100304754A1
• Time in Patent Office: 2,608 Days
• Field of Search: 455/456.1, 455/556.2, 455/574, 455/556.1, 455/456.6
• US Class Current: 1/1
• CPC Class Codes: H04M 2250/12 including a sensor for measuring a physical value, e.g. temperature or motion telephones including GPS signal receivers H04M2250/10
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The subject matter disclosed herein relates to a system and method for detecting a movement pattern of a mobile device based at least in part on one or more signals representative of one or more sensor measurements, and for determining whether the movement pattern corresponds to a predefined level of movement of the mobile device.

Claims

1. A method comprising:

detecting a predefined movement pattern of a mobile device during an observation period that comprises a plurality of elementary periods of time, based at least in part on;

results which are representative of sensor measurements obtained in an elementary period of time from two or more sensors in the mobile device, each result being determined by a comparator for a sensor measurement of each sensor to exceed or not exceed a predetermined first threshold applicable thereon, the results evaluating to a summary event for the elementary period indicative of a status of motion of the mobile device or no motion of the mobile device in the elementary period, and

a number of elementary periods of time in the observation period, in which the results of comparing the sensor measurements in each elementary period evaluate to the summary event for the elementary period indicative of the status of motion of the mobile device, being sufficient in said number to exceed a second threshold on said number; and

determining whether the predefined movement pattern corresponds to a substantially stationary position of the mobile device or to a physical displacement of the mobile device, determined based on a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval.

2. The method of claim 1, further comprising determining whether the mobile device is in a movement state or in a stationary state based on the determining whether the predefined movement pattern corresponds to the movement of the center of mass of the mobile device beyond the distance of the third threshold within the time interval.

3. The method of claim 2, further comprising transitioning the mobile device to a low power state in response to determining that the mobile device is in a stationary state.

4. The method of claim 2, further comprising transitioning the mobile device to a high power state in response to determining the mobile device is in a movement state.

5. The method of claim 4, further comprising transmitting a signal to one or more nearby cell towers in response to transitioning the mobile device to the high power state.

6. The method of claim 1, wherein the determining whether the movement pattern corresponds to the movement of the center of mass of the mobile device beyond the distance of the third threshold comprises filtering one or more signals corresponding to low frequency movements.

7. The method of claim 1, wherein the sensor measurements are obtained from two or more sensors and a specific first threshold that is exceeded in the respective elementary periods corresponds to a specific sensor.

8. The method of claim 7, wherein the two or more sensors comprises at least two of an accelerometer, a gyroscope, and a barometer.

9. The method of claim 1, wherein the mobile device comprises a cellular phone or a Personal Digital Assistant (PDA).

10. The method of claim 1, wherein the predefined movement pattern comprises at least a threshold level of linear and angular movement of the mobile device.

11. The method of claim 1 wherein:

the sensor measurements in the elementary time periods that exceed one or more thresholds are from an accelerometer.

12. The method of claim 1 wherein:

signals represent the elementary events which are representative of sensor measurements obtained in the elementary period; and

the signals are logically operated on, to obtain a signal representing the summary event for the elementary period.

13. An apparatus comprising:

means for detecting a predefined movement pattern of a mobile device during an observation period that comprises a plurality of elementary periods of time, based at least in part on;

results which are representative of sensor measurements obtained in an elementary period of time from two or more sensors in the mobile device, each result being determined by a comparator for a sensor measurement of each sensor to exceed or not exceed a predetermined first threshold applicable thereon, the results evaluating to a summary event for the elementary period indicative of a status of motion of the mobile device or no motion of the mobile device in the elementary period, and

a number of elementary periods of time in the observation period, in which the sensor measurements in each elementary period evaluate to the summary event for the elementary period indicative of the status of motion of the mobile device, being sufficient in said number to exceed a second threshold on said number; and

means for determining whether the predefined movement pattern corresponds to a substantially stationary position of the mobile device or to a physical displacement of the mobile device, determined based upon a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval.

14. The apparatus of claim 13, further comprising means for generating signals indicative of the results.

15. The apparatus of claim 14, wherein the means for generating signals comprises at least one of an accelerometer means, a gyroscope means, and a barometer means.

16. The apparatus of claim 13, further comprising means for determining whether the mobile device is in a movement state or in a stationary state based on a determination of whether the predefined movement pattern corresponds to the movement of the center of mass of the mobile device beyond the third threshold on distance, within the time interval.

17. The apparatus of claim 16, further comprising means for transitioning the mobile device to a low power state in response to determining that the mobile device is in a stationary state, or for transitioning the mobile device to a high power state in response to determining that the mobile device is in a movement state.

18. The apparatus of claim 13 wherein:

the sensor measurements in the elementary time periods that exceed one or more thresholds are from an accelerometer.

19. A system comprising:

one or more sensors; and

a mobile device comprising a special purpose apparatus to;

detect a predefined movement pattern of the mobile device during an observation period that comprises a plurality of elementary periods of time, based at least in part on;

results which are representative of sensor measurements obtained in an elementary period of time from two or more sensors in the mobile device, each result being determined by a comparator for a sensor measurement of each sensor to exceed or not exceed a predetermined first threshold applicable thereon, the results evaluating to a summary event for the elementary period indicative of a status of motion of the mobile device or no motion of the mobile device in the elementary period, and

a number of elementary periods of time in the observation period, in which the sensor measurements in each elementary period evaluate to the summary event for the elementary period indicative of the status of motion of the mobile device, being sufficient in said number to exceed a second threshold on said number; and

determine whether the movement pattern corresponds to a substantially stationary position of the mobile device or to a physical displacement of the mobile device, determined based upon a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval.

20. The system of claim 19, wherein the one or more sensors comprise at least one of an accelerometer, a gyroscope, and a barometer.

21. The system of claim 19, wherein the one or more sensors are housed within the mobile device.

22. The system of claim 19, wherein the one or more sensors are disposed outside of the mobile device.

23. The system of claim 19, wherein the special purpose apparatus is further configured to determine whether the mobile device is in a movement state or in a stationary state based at least in part on a determination of whether the predefined movement pattern corresponds to the movement of the center of mass of the mobile device beyond the third threshold on distance, within the time interval.

24. The system of claim 23, wherein the special purpose apparatus is further configured to implement a low power state for the mobile device at least partially in response to determining that the mobile device is in a stationary state.

25. The system of claim 23, wherein the special purpose apparatus is further configured to implement a high power state of the mobile device at least partially in response to determining that the mobile device is in a movement state.

26. The system of claim 19 wherein:

the sensor measurements in the elementary time periods that exceed one or more thresholds are from an accelerometer.

27. An article comprising a non-transitory storage medium, the non-transitory storage medium comprising machine-readable instructions stored thereon which are executable by a special purpose apparatus to:

detect a predefined movement pattern of the mobile device during an observation period that comprises a plurality of elementary periods of time, based at least in part on;

results which are representative of sensor measurements obtained in an elementary period of time from two or more sensors in the mobile device, each result being determined by a comparator for a sensor measurement of each sensor to exceed or not exceed a predetermined first threshold applicable thereon, the results evaluating to a summary event for the elementary period indicative of a status of motion of the mobile device or no motion of the mobile device in the elementary period, and

a number of elementary periods of time in the observation period, in which the sensor measurements in each elementary period evaluate to the summary event for the elementary period indicative of the status of motion of the mobile device, being sufficient in said number to exceed a second threshold on said number; and

determine whether the movement pattern corresponds to a substantially stationary position of the mobile device or to a physical displacement of the mobile device, determined based upon a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval.

28. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to determine whether the mobile device is in a movement state or in a stationary state based at least partially on the determining whether the predefined movement pattern corresponds to the movement of the center of mass of the mobile device beyond the third threshold on distance, within the time interval.

29. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to determine whether the movement pattern corresponds to the movement of the center of mass of the mobile device beyond the threshold distance based, at least in part, on filtering detected low frequency movements from the predefined movement pattern.

30. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to transition to a low power state of the mobile device at least partially in response to determining that the mobile device is in a stationary state.

31. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to transition to a high power state of the mobile device at least partially in response to determining that the mobile device is in a movement state.

32. The article of claim 31, wherein the instructions are further executable by the special purpose apparatus to initiate transmission of a signal to one or more nearby cell towers at least partially in response to transitioning to the high power state.

33. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to obtain one or more signals representative of sensor measurements from a set of sensors.

34. The article of claim 27, wherein the instructions are further executable by the special purpose apparatus to obtain one or more signals representative of sensor measurements within the time interval.

35. The article of claim 27 wherein:

the sensor measurements in the elementary time periods that exceed one or more thresholds are from an accelerometer.

36. A method comprising:

detecting a predefined movement pattern of a mobile device during an observation period that comprises elementary periods of time, based at least in part on a series of elementary events which are representative of sensor measurements in the elementary periods that exceed or do not exceed one or more first thresholds applicable thereon to evaluate to a status of motion or no motion in an elementary period, and elementary periods with the sensor measurements that evaluate to the status of motion being sufficient in number in the observation period to exceed a second threshold on said number; and

determining whether the predefined movement pattern corresponds to a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval;

wherein the elementary events are represented by signals clocked as ones and zeros, with a one representing a first elementary event indicative of said status of motion, and a zero representing a second elementary event indicative of a status of no motion.

37. An apparatus comprising:

means for detecting a predefined movement pattern of a mobile device during an observation period that comprises elementary periods of time, based at least in part on a series of elementary events which are representative of sensor measurements in the elementary periods that exceed or do not exceed one or more first thresholds applicable thereon to evaluate to a status of motion or no motion in an elementary period, and elementary periods with the sensor measurements that evaluate to the status of motion being sufficient in number in the observation period to exceed a second threshold on said number; and

means for determining whether the movement pattern corresponds to a predefined level of movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval;

wherein the elementary events are represented by signals clocked into said register as ones and zeros, with a one representing a first elementary event indicative of said status of motion, and a zero representing a second elementary event indicative of a status of no motion.

38. A system, comprising:

one or more sensors; and

a mobile device comprising a special purpose apparatus to;

detect a predefined movement pattern of the mobile device during an observation period that comprises elementary periods of time, based at least in part on a series of elementary events which are representative of sensor measurements by the one or more sensors in the elementary periods that exceed or do not exceed one or more first thresholds applicable thereon to evaluate to a status of motion or no motion in an elementary period, and elementary periods with the sensor measurements that evaluate to the status of motion being sufficient in number in the observation period to exceed a second threshold on said number; and

determine whether the movement pattern corresponds to a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval;

wherein the elementary events are represented by signals clocked into said register as ones and zeros, with a one representing a first elementary event indicative of said status of motion, and a zero representing a second elementary event indicative of a status of no motion.

39. An article comprising:

a non-transitory storage medium comprising machine-readable instructions stored thereon which are executable by a special purpose apparatus to;

detect a predefined movement pattern of a mobile device during an observation period that comprises elementary periods of time, based at least in part on a series of elementary events which are representative of sensor measurements in the elementary time periods that exceed or do not exceed one or more first thresholds applicable thereon to evaluate to a status of motion or no motion in an elementary period, and elementary periods with the sensor measurement signals that evaluate to the status of motion being sufficient in number in the observation period to exceed a second threshold on said number; and

determine whether the predefined movement pattern corresponds to a movement of a center of mass of the mobile device beyond a third threshold on distance, within a time interval;

clock signals representing the elementary events into a register as ones and zeros, with a one representing a first elementary event indicative of said status of motion, and a zero representing a second elementary event indicative of a status of no motion.