Multi-tiered distance travelled estimator
First Claim
1. A method of performing a distance travelled estimate with a mobile device, the method comprising:
- obtaining a base position for the mobile device, the base position having an associated base uncertainty;
obtaining a first set of signals for position determination with the mobile device;
determining a first position of the mobile device with the first set of signals, the first position having an associated first uncertainty;
determining a first quality of displacement between the base position and the first position based on a displacement between the base position and the first position and the associated base uncertainty and the associated first uncertainty; and
updating the distance travelled estimate based on the displacement between the base position and the first position in response to the first quality of displacement being greater than a threshold.
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Accused Products
Abstract
Techniques are provided which may be implemented using various methods and/or apparatuses in a mobile device to perform a distance travelled estimate with a mobile device. The distance travelled estimate is performed by determining a quality of displacement between a base position and each new position for the mobile device, which is determined based on the displacement between the positions and their associated uncertainties. If the quality of displacement is sufficient, the distance travelled estimate is updated using the displacement between the positions. Multiple tiers may be used, where, for example, if the quality of displacement is sufficiently high, the displacement associated with a preceding position may be excised from the distance travelled estimate and replaced with the displacement associated with the new position. Additionally, if the quality of displacement is even greater, the new position may be set as the base position.
7 Citations
34 Claims
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1. A method of performing a distance travelled estimate with a mobile device, the method comprising:
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obtaining a base position for the mobile device, the base position having an associated base uncertainty; obtaining a first set of signals for position determination with the mobile device; determining a first position of the mobile device with the first set of signals, the first position having an associated first uncertainty; determining a first quality of displacement between the base position and the first position based on a displacement between the base position and the first position and the associated base uncertainty and the associated first uncertainty; and updating the distance travelled estimate based on the displacement between the base position and the first position in response to the first quality of displacement being greater than a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mobile device configured to perform a distance travelled estimate, the mobile device comprising:
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a receiver configured to receive signals for position determination; and one or more processing units configured to; obtain a base position, the base position having an associated base uncertainty; obtain a first set of signals for position determination from the receiver; determine a first position with the first set of signals, the first position having an associated first uncertainty; determine a first quality of displacement between the base position and the first position based on a displacement between the base position and the first position and the associated base uncertainty and the associated first uncertainty; and update the distance travelled estimate based on the displacement between the base position and the first position in response to the first quality of displacement being greater than a threshold. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A mobile device configured to perform a distance travelled estimate, the mobile device comprising:
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means for obtaining a base position for the mobile device, the base position having an associated base uncertainty; means for obtaining a first set of signals for position determination with the mobile device; means for determining a first position of the mobile device with the first set of signals, the first position having an associated first uncertainty; means for determining a first quality of displacement between the base position and the first position based on a displacement between the base position and the first position and the associated base uncertainty and the associated first uncertainty; and means for updating the distance travelled estimate based on the displacement between the base position and the first position in response to the first quality of displacement being greater than a threshold. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A non-transitory computer readable medium having stored therein computer executable instructions executable by one or more processing units of a mobile device to:
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obtain a base position for the mobile device, the base position having an associated base uncertainty; obtain a first set of signals for position determination; determine a first position for the mobile device with the first set of signals, the first position having an associated first uncertainty; determine a first quality of displacement between the base position and the first position based on a displacement between the base position and the first position and the associated base uncertainty and the associated first uncertainty; and update a distance travelled estimate for the mobile device based on the displacement between the base position and the first position in response to the first quality of displacement being greater than a threshold. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification