Automatic activation of speed measurement in mobile device based on available motion indicia
First Claim
1. A mobile device comprising:
- a selectively activated speed sensor for determining, when activated, a speed at which the mobile device is travelling and for determining if the mobile device is travelling at a speed in excess of an initial threshold; and
a monitor for identifying when the mobile device may be travelling at a speed in excess of the initial threshold using a motion indicium other than speed determined by the speed sensor and in response, activating the speed sensor to determine the speed at which the mobile device is travelling.
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Accused Products
Abstract
A system and method for speed measurement of a mobile device, using an speed sensor such as a satellite navigation system or an accelerometer, does not need such speed sensor to be continually activated. The system and method make use of a monitor for monitoring at least one motion indicium for indicating that the speed of the mobile device is above an initial threshold, including but not limited to: monitoring the Doppler shift measurements of a timing signal; monitoring the timing advance of a cellular radio signal; monitoring the number of base stations visible to the mobile device; monitoring the frequency of base station handover, however determined; monitoring the level crossings and/or the autocorrelation of an RSSI signal; and/or triangulation of the position of the mobile device. When the monitor determines that the mobile device may be travelling in excess of a threshold speed, a speed sensor is activated to confirm the indication. If the speed sensor determines that the mobile device is travelling at a speed below a second threshold, the speed sensor is deactivated.
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Citations
35 Claims
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1. A mobile device comprising:
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a selectively activated speed sensor for determining, when activated, a speed at which the mobile device is travelling and for determining if the mobile device is travelling at a speed in excess of an initial threshold; and a monitor for identifying when the mobile device may be travelling at a speed in excess of the initial threshold using a motion indicium other than speed determined by the speed sensor and in response, activating the speed sensor to determine the speed at which the mobile device is travelling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A machine-implemented method for determining a speed of a mobile device, the method comprising the acts of:
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a. identifying a situation when the mobile device may be travelling at a speed in excess of an initial threshold based on input from a monitor for identifying when the mobile device may be travelling at a speed in excess of the initial threshold using a motion indicium other than speed determined by a speed sensor; and b. responsive to identifying such a situation, activating the speed sensor to determine the speed of the mobile device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A selectively activated speed sensor associated with a mobile device for determining, when activated, a speed at which the mobile device is travelling;
the speed sensor being activated to determine the speed at which the mobile device is travelling in response to a monitor identifying that the mobile device may be travelling at a speed in excess of the initial threshold using a motion indicium other than speed determined by the speed sensor. - View Dependent Claims (31)
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32. A monitor associated with a mobile device for identifying that the mobile device may be travelling at a speed in excess of an initial threshold using a motion indicium other than speed determined by a speed sensor and in response activating the speed sensor to determine a speed at which the mobile device is travelling.
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33. A non-transitory computer-readable medium in a selectively activated speed sensor associated with a mobile device, the medium having stored thereon, computer-readable and computer-executable instructions which, when executed by a processor, cause the processor to perform steps comprising:
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determining, when activated, a speed at which the mobile device is travelling; the speed sensor being activated in response to a monitor identifying that the mobile device may be travelling at a speed in excess of the initial threshold using a motion indicium other than speed determined by a speed sensor. - View Dependent Claims (34)
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35. A non-transitory computer-readable medium in a monitor associated with a mobile device, the medium having stored thereon, computer-readable and computer-executable instructions which, when executed by a processor, cause the processor to perform steps comprising:
identifying that the mobile device may be travelling at a speed in excess of an initial threshold using a motion indicium other than speed determined by a speed sensor and thereafter activating the speed sensor for determining a speed at which the mobile device is travelling.
Specification