Location obtained by combining last known reliable position with position changes
First Claim
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1. A method for determining location of as wireless communication device, the method comprising:
- establishing a last known position fix based on reliable geo-positioning data;
establishing a measurement of position based on at least one of a measurement of change from the last known position fix or a separate independent measurement of location;
establishing a weighted average of measured location fixes using the last known position fix and the measurement of position.
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Abstract
Location of a wireless communication device is determined by a combination of geolocation and a detection of augmenting data such as acceleration and/or speed over time measurements. A last known terrestrial navigation fix is established based on reliable terrestrial navigation or GPS data. A zone of valid location fixes based on the last known terrestrial navigation fix and an output of a rate detection circuit can be established. A weighted average is taken of using independent location measurement and detected location using last known reliable position plus change in position by integrating position changes over time.
19 Citations
23 Claims
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1. A method for determining location of as wireless communication device, the method comprising:
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establishing a last known position fix based on reliable geo-positioning data; establishing a measurement of position based on at least one of a measurement of change from the last known position fix or a separate independent measurement of location; establishing a weighted average of measured location fixes using the last known position fix and the measurement of position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22)
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11. A wireless device for providing location data concerning an object, the wireless device comprising:
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a wireless communication circuit capable of communication with a multiuser wireless subscriber network; geolocation circuit; a location augmentation circuit; and a control circuit to activate the geolocation circuit to establish a last known terrestrial navigation fix, and responsive to the location augmentation circuit to provide location update data, the control circuit providing a weighted average of location data based on received location data from the geolocation circuit and the location augmentation circuit. - View Dependent Claims (12, 13, 14, 15)
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16. A computer program product, comprising:
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a non-transitory computer-readable medium comprising; code for establishing a last known position fix based on reliable geo-positioning data; code for establishing a measurement of position based on at least one of a measurement of change from the last known position fix or a separate independent measurement of location; and code for establishing a weighted average of measured location fixes using the last known position fix and the measurement of position.
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17. Apparatus for providing information regarding the location of a wireless communication device, the apparatus comprising:
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means for establishing a last known terrestrial navigation fix based on reliable terrestrial navigation data or GPS positioning method; rate detection means; and means for establishing a weighted average of location fixes based on the last known terrestrial navigation fix and an output of the rate detection means. - View Dependent Claims (18, 19, 20, 21, 23)
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Specification