Method and system for providing enhanced location based information for wireless handsets using dead reckoning
First Claim
1. A method of providing an enhanced location based service via a mobile device, comprising:
- receiving in a processor of a mobile device a first set of externally determined location information;
generating, via the processor executing a haversine function, a best stride length estimate based on the first set of externally determined location information and a second set of location information;
generating by the processor a best altitude estimate based on barometer information and one or more of the first set of externally determined location information and the second set of location information;
generating by the processor a best compass heading estimate based on magnetometer information and one or more of the first set of externally determined location information and the second set of location information; and
generating by the processor dead reckoning location information based on the best stride length estimate, the best altitude estimate, and the best compass heading estimate.
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Accused Products
Abstract
Methods, devices and systems for generating enhanced location information on or about a mobile device may include improved dead reckoning solutions in which the mobile device performs location determination calculations with the aid of network components or global positioning systems (GPS). The network aided location information may be provided to the processor and utilized in measuring the accuracy of sensor based location calculations. The mobile device may utilize local sensors to obtain a set of combined sensor output location information, which may seed execution of dead reckoning. To ensure that most accurate location information is provide to the enhanced location based service, the dead reckoning location information may be compared to a current best estimate. Results of the comparison may be passed to the enhanced location based service and the methods, systems, and devices may reiterate the location determination.
43 Citations
20 Claims
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1. A method of providing an enhanced location based service via a mobile device, comprising:
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receiving in a processor of a mobile device a first set of externally determined location information; generating, via the processor executing a haversine function, a best stride length estimate based on the first set of externally determined location information and a second set of location information; generating by the processor a best altitude estimate based on barometer information and one or more of the first set of externally determined location information and the second set of location information; generating by the processor a best compass heading estimate based on magnetometer information and one or more of the first set of externally determined location information and the second set of location information; and generating by the processor dead reckoning location information based on the best stride length estimate, the best altitude estimate, and the best compass heading estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A mobile computing device, comprising:
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an accelerometer; a barometer; a magnetometer; and a processor coupled to the accelerometer, the barometer, and the magnetometer, wherein the processor is configured with processor executable instructions to perform operations comprising; receiving a first set of externally determined location information; generating, via execution of a haversine function, a best stride length estimate based on the first set of externally determined location information and a second set of location information; generating a best altitude estimate based barometer information and one or more of the first set of externally determined location information and the second set of location information; generating a best compass heading estimate based magnetometer information and one or more of the first set of externally determined location information and the second set of location information; and generating dead reckoning location information based on the best stride length estimate, the best altitude estimate, and the best compass heading estimate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium having stored thereon processor-executable software instructions configured to cause a processor of a mobile device to perform operations comprising:
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receiving a first set of externally determined location information; generating, via executing a haversine function, a best stride length estimate based on the first set of externally determined location information and a second set of location information; generating a best altitude estimate based on barometer information and one or more of the first set of externally determined location information and the second set of location information; generating a best compass heading estimate based on magnetometer information and one or more of the first set of externally determined location information and the second set of location information; and generating dead reckoning location information based on the best stride length estimate, the best altitude estimate, and the best compass heading estimate. - View Dependent Claims (20)
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Specification