Altitude-based indoor or outdoor detection
First Claim
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1. A method for improving an estimated position using altitude-based indoor or outdoor detection, the method comprising:
- determining an estimated position of a receiver;
determining an estimated altitude of the receiver;
identifying an altitude associated with the estimated position;
determining if a relationship between the estimated altitude and the identified altitude meets a first condition;
determining if the receiver is inside or outside a building depending on whether the relationship meets the first condition; and
improving one or both of the estimated position or the estimated altitude based on determining whether the receiver is inside or outside,wherein determining if the receiver is inside or outside the building depending on whether the relationship meets the first condition comprises (i) determining that the receiver is inside the building if the relationship meets the first condition, and (ii) if the relationship does not meet the first condition;
identifying one or more generated confidence values;
receiving input regarding a first consideration;
generating a second confidence value using the input,wherein the second confidence value represents a confidence that the receiver is inside the building and not outside the building;
generating a combined confidence value using the one or more generated confidence values and the second confidence value; and
determining if the receiver is inside or outside the building using the combined confidence value.
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Abstract
Using estimates of a receiver'"'"'s altitude to determine where a receiver is located and to refine a positioning system'"'"'s estimate of a receiver'"'"'s position. Systems and methods determine whether a receiver is inside or outside a building, and may use the determination to confirm or adjust an initial estimate of the receiver'"'"'s position. Various approaches for making the determination and for assessing the initial estimate of the receiver'"'"'s position are described.
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Citations
28 Claims
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1. A method for improving an estimated position using altitude-based indoor or outdoor detection, the method comprising:
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determining an estimated position of a receiver; determining an estimated altitude of the receiver; identifying an altitude associated with the estimated position; determining if a relationship between the estimated altitude and the identified altitude meets a first condition; determining if the receiver is inside or outside a building depending on whether the relationship meets the first condition; and improving one or both of the estimated position or the estimated altitude based on determining whether the receiver is inside or outside, wherein determining if the receiver is inside or outside the building depending on whether the relationship meets the first condition comprises (i) determining that the receiver is inside the building if the relationship meets the first condition, and (ii) if the relationship does not meet the first condition; identifying one or more generated confidence values; receiving input regarding a first consideration; generating a second confidence value using the input, wherein the second confidence value represents a confidence that the receiver is inside the building and not outside the building; generating a combined confidence value using the one or more generated confidence values and the second confidence value; and determining if the receiver is inside or outside the building using the combined confidence value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. One or more non-transitory machine-readable media embodying program instructions that, when executed by one or more machines, cause the one or more machines to perform a method for improving an estimated position using altitude-based indoor or outdoor detection, the method comprising:
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determining an estimated position of a receiver; determining an estimated altitude of the receiver; identifying an altitude associated with the estimated position; determining if a relationship between the estimated altitude and the identified altitude meets a first condition; determining if the receiver is inside or outside a building depending on whether the relationship meets the first condition; and improving one or both of the estimated position or the estimated altitude based on determining whether the receiver is inside or outside, wherein determining if the receiver is inside or outside the building depending on whether the relationship meets the first condition comprises (i) determining that the receiver is inside the building if the relationship meets the first condition, and (ii) if the relationship does not meet the first condition; identifying one or more generated confidence values; receiving input regarding a first consideration; generating a second confidence value using the input, wherein the second confidence value represents a confidence that the receiver is inside the building and not outside the building; generating a combined confidence value using the one or more generated confidence values and the second confidence value; and determining if the receiver is inside or outside the building using the combined confidence value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification