Method and apparatus for optimized indoor position estimation
First Claim
1. A system to estimate location of a mobile device, comprising:
- one or more antennas;
a radio in communication with the at least one or more antennas;
a processor to communicate with radio, the processor configured to;
measure a distance from the mobile device to a plurality of access points (APs);
calculate a distance from each of a plurality of identified locations to each of the plurality of APs;
calculate a measurement error for each of the plurality of the calculated distances;
for each of the calculated measurement errors determine a probability of measurement error as a function of both presence and absence of an outlier AP for each location;
sum the probability of measurement errors for each of the plurality of APs for each location; and
select the location with the highest probability of measurement error sum.
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Accused Products
Abstract
The disclosure relates to a method, apparatus and system for optimized indoor position estimation. Specifically, the disclosure relates to indoor position estimation by considering the likelihood that an access point may be an outlier. In one embodiment, the disclosure relates to a system to determine a device location. The system includes one or more antennas; a radio in communication with the at least one or more antennas; a processor to communicate with radio, the processor configured to: measure a distance from the device to a plurality of access points (APs); define a plurality of locations and calculating a distance from each of the plurality of locations to each of the plurality of APs; calculate a measurement error for each of the plurality of the calculated distances; for each location, determine a probability of measurement error as a function of both presence and absence of an outlier AP; for each location, sum the probability of measurement errors for the plurality of APs; and select the location with the highest probability of measurement error sum as an estimated device location.
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Citations
25 Claims
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1. A system to estimate location of a mobile device, comprising:
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one or more antennas; a radio in communication with the at least one or more antennas; a processor to communicate with radio, the processor configured to; measure a distance from the mobile device to a plurality of access points (APs); calculate a distance from each of a plurality of identified locations to each of the plurality of APs; calculate a measurement error for each of the plurality of the calculated distances; for each of the calculated measurement errors determine a probability of measurement error as a function of both presence and absence of an outlier AP for each location; sum the probability of measurement errors for each of the plurality of APs for each location; and select the location with the highest probability of measurement error sum. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A location estimation device, comprising:
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a first processor module configured to measure a distance from a mobile device to a plurality of access points (APs) and to calculate a distance from a plurality of identified locations to each of the plurality of APs; a second processor module configured to calculate a measurement error for each of the plurality of the calculated distances and to determine a probability of measurement error as a function of both presence and absence of an outlier AP for each location; and a third processor module to sum the probability of measurement errors for the plurality of APs for each location and to select the location with the highest probability of measurement error sum. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method to estimate location of a mobile device, the method comprising:
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measuring a distance from the mobile device to each of a plurality of access points (APs); defining a plurality of locations and calculating a distance from each of the plurality of locations to each of the plurality of APs; calculating a measurement error for each of the plurality of the calculated distances; for each location, determining a probability of measurement error as a function of both presence and absence of an outlier AP; for each location, summing the probability of measurement error for each of the plurality of APs; and selecting the location with the highest probability of measurement error sum as an estimated mobile device location. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable storage device having a set of instructions to cause a processor to perform a process comprising:
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measure a distance from the device to a plurality of access points (APs); define a plurality of locations and calculate a distance from each of the respective plurality of locations to each of the plurality of APs; calculate a measurement error for each of the plurality of the calculated distances; for each location, determine a probability of measurement error as a function of both presence and absence of an outlier AP; for each location, sum the probability of measurement errors for the plurality of APs; and select a location with the highest probability of measurement error sum as an estimated device location. - View Dependent Claims (23, 24, 25)
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Specification