System and method for estimating positioning error within a WLAN-based positioning system
DCFirst Claim
1. In a Wireless Local Area Network (WLAN) positioning system for estimating the position of a WLAN-enabled device, a method of estimating an expected error of a position estimate, a method comprising:
- the WLAN-enabled device receiving signals transmitted by at least one WLAN access point in range of the WLAN-enabled device;
estimating the position of the WLAN-enabled device based on the received signals from the at least one WLAN access point in range of the WLAN enabled device; and
estimating an expected error, in terms of distance, of the position estimate based on characteristics of the at least one WLAN access point used for estimating the position of the WLAN-enabled device, wherein the expected error predicts a relative accuracy of the position estimate in terms of distance.
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Abstract
The invention features a method of estimating an expected error of a position estimate for use in a WLAN positioning system that estimates the position of a WLAN-enabled device. The WLAN-enabled device receives signals transmitted by a WLAN access point in range of the WLAN-enabled device. The method estimates the position of the WLAN-enabled device based on the received signals from the WLAN access point in range of the WLAN enabled device. The method also estimates an expected error of the position estimate based on characteristics of the WLAN access point in range of the WLAN enabled device, wherein the expected error predicts a relative accuracy of the position estimate.
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Citations
22 Claims
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1. In a Wireless Local Area Network (WLAN) positioning system for estimating the position of a WLAN-enabled device, a method of estimating an expected error of a position estimate, a method comprising:
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the WLAN-enabled device receiving signals transmitted by at least one WLAN access point in range of the WLAN-enabled device; estimating the position of the WLAN-enabled device based on the received signals from the at least one WLAN access point in range of the WLAN enabled device; and estimating an expected error, in terms of distance, of the position estimate based on characteristics of the at least one WLAN access point used for estimating the position of the WLAN-enabled device, wherein the expected error predicts a relative accuracy of the position estimate in terms of distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In a Wireless Local Area Network (WLAN) positioning system for estimating the position of a WLAN-enabled device, a system for estimating an expected error of a position estimate, the system for estimating the expected error comprising:
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a WLAN-enabled device for receiving signals transmitted by at least one WLAN access point in range of the WLAN-enabled device; position estimating logic for estimating the position of the WLAN-enabled device based on the received signals from the at least one WLAN access point in range of the WLAN enabled device; and error estimating logic for estimating an expected error, in terms of distance, of the position estimate based on characteristics of the at least one WLAN access point used for estimating the position of the WLAN-enabled device, wherein the expected error predicts a relative accuracy of the position estimate in terms of distance. - View Dependent Claims (19, 20)
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21. In a Wireless Local Area Network (WLAN) positioning system for estimating the position of a WLAN-enabled device, a method of estimating an expected error of a position estimate, a method comprising:
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the WLAN-enabled device receiving signals transmitted by at least one WLAN access point in range of the WLAN-enabled device; estimating the position of the WLAN-enabled device based on the received signals from the at least one WLAN access point in range of the WLAN enabled device; and estimating an expected error, in terms of distance, of the position estimate based on the number of access points used to estimate the position of the WLAN-enabled device, wherein the expected error predicts a relative accuracy of the position estimate in terms of distance. - View Dependent Claims (22)
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Specification