Power-efficient location estimation
First Claim
1. A method comprising:
- scanning, by a wireless computing device, a frequency set of frequencies used by a first group of base stations;
determining a first location of the wireless computing device;
selecting, by the wireless computing device, a frequency subset of the frequency set, wherein the frequency subset excludes at least one frequency in the frequency set, wherein a second group of base stations use the respective frequencies of the frequency subset, and wherein the second group of base stations is a subset of the first group of base stations;
estimating, by the wireless computing device, a second location of the wireless computing device based on information relating to one or more base stations in the second group of base stations;
determining, by the wireless computing device, whether the first location and the second location are within a threshold distance of one another;
after determining that the first location and the second location are within the threshold distance of one another, the wireless computing device performing an additional frequency scan of the frequency subset of the frequency set;
after performing the additional frequency scan, the wireless computing device determining that a third group of base stations use the respective frequencies of the frequency subset, wherein the third group of base stations is different from the second group of base stations; and
based on the third group of base stations being different from the second group of base stations, the wireless computing device estimating a third location of the wireless computing device.
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Accused Products
Abstract
A wireless computing device may scan a frequency set. A first group of base stations may use the frequencies in the frequency set. Based on information relating to one or more base stations in the first group of base stations, the wireless computing device may estimate its location. The wireless computing device may further select a frequency subset of the frequency set. A second group of base stations may use the frequencies of the frequency subset. Based on information relating to one or more base stations in the second group of base stations, the wireless computing device may again estimate its location. If the two estimated locations are within a threshold distance of one another, the wireless computing device may perform, during a subsequent location-estimating operation, an additional frequency scan using the frequency subset.
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Citations
20 Claims
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1. A method comprising:
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scanning, by a wireless computing device, a frequency set of frequencies used by a first group of base stations; determining a first location of the wireless computing device; selecting, by the wireless computing device, a frequency subset of the frequency set, wherein the frequency subset excludes at least one frequency in the frequency set, wherein a second group of base stations use the respective frequencies of the frequency subset, and wherein the second group of base stations is a subset of the first group of base stations; estimating, by the wireless computing device, a second location of the wireless computing device based on information relating to one or more base stations in the second group of base stations; determining, by the wireless computing device, whether the first location and the second location are within a threshold distance of one another; after determining that the first location and the second location are within the threshold distance of one another, the wireless computing device performing an additional frequency scan of the frequency subset of the frequency set; after performing the additional frequency scan, the wireless computing device determining that a third group of base stations use the respective frequencies of the frequency subset, wherein the third group of base stations is different from the second group of base stations; and based on the third group of base stations being different from the second group of base stations, the wireless computing device estimating a third location of the wireless computing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An article of manufacture including a non-transitory computer-readable medium, having stored thereon program instructions that, upon execution by a wireless computing device, cause the wireless computing device to perform operations comprising:
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scanning a frequency set of frequencies used by a first group of base stations; determining a first location of the wireless computing device; selecting a frequency subset of the frequency set, wherein the frequency subset excludes at least one frequency in the frequency set, wherein a second group of base stations use the respective frequencies of the frequency subset, and wherein the second group of base stations is a subset of the first group of base stations; estimating a second location of the wireless computing device based on information relating to one or more base stations in the second group of base stations; determining whether the first location and the second location are within a threshold distance of one another; after determining that the first location and the second location are within the threshold distance of one another, performing an additional frequency scan of the frequency subset of the frequency set; after performing the additional frequency scan, determining that a third group of base stations use the respective frequencies of the frequency subset, wherein the third group of base stations is different from the second group of base stations; and based on the third group of base stations being different from the second group of base stations, estimating a third location of the wireless computing device. - View Dependent Claims (15, 16, 17)
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18. A wireless computing device comprising:
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at least one processor; memory; and program instructions, stored in the memory, that upon execution by the at least one processor cause the wireless computing device to perform operations comprising; scanning a frequency set of frequencies used by a first group of base stations; determining a first location of the wireless computing device; selecting a frequency subset of the frequency set, wherein the frequency subset excludes at least one frequency in the frequency set, wherein a second group of base stations use the respective frequencies of the frequency subset, and wherein the second group of base stations is a subset of the first group of base stations; estimating a second location of the wireless computing device based on information relating to one or more base stations in the second group of base stations; determining whether the first location and the second location are within a threshold distance of one another; after determining that the first location and the second location are within the threshold distance of one another, performing an additional frequency scan of the frequency subset of the frequency set; after performing the additional frequency scan, determining that a third group of base stations use the respective frequencies of the frequency subset, wherein the third group of base stations is different from the second group of base stations; and based on the third group of base stations being different from the second group of base stations, estimating a third location of the wireless computing device. - View Dependent Claims (19, 20)
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Specification