Method and apparatus for using map information aided enhanced portable navigation
First Claim
1. A method for enhancing a navigation solution of a portable device and a platform using map information, wherein the mobility of the device is constrained or unconstrained within the platform and wherein the device may be tilted to any orientation, the method comprising:
- a) obtaining sensor data for the portable device;
b) deriving a navigation solution based at least in part on the sensor data;
c) providing estimated position information for the portable device based at least in part on the navigation solution;
d) obtaining map information for an area encompassing a current location of the user;
e) generating multiple hypotheses regarding possible positions of the portable device based at least in part on the estimated position information and the map information;
f) managing the hypotheses based at least in part on the estimated position information and the map information, wherein managing the hypotheses comprises adding, eliminating and combining hypotheses;
g) processing the managed hypotheses to update the estimated position information for the portable device; and
h) providing an enhanced navigation solution using the updated estimated position information.
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Abstract
This disclosure is directed to enhancing the navigation solution of a portable device using map information. Sensor data for the portable device may be used to derive a navigation solution. Position information for the device may be estimated using the navigation solution. Map information for an area encompassing a current location of the user may also be obtained. Multiple hypotheses regarding possible positions of the portable device may be generated using the estimated position information and the map information. By managing and processing the hypotheses, updated estimated position information may be provided. The updated estimated position information may be provided as output or feedback to enhance the navigation solution.
15 Citations
44 Claims
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1. A method for enhancing a navigation solution of a portable device and a platform using map information, wherein the mobility of the device is constrained or unconstrained within the platform and wherein the device may be tilted to any orientation, the method comprising:
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a) obtaining sensor data for the portable device; b) deriving a navigation solution based at least in part on the sensor data; c) providing estimated position information for the portable device based at least in part on the navigation solution; d) obtaining map information for an area encompassing a current location of the user; e) generating multiple hypotheses regarding possible positions of the portable device based at least in part on the estimated position information and the map information; f) managing the hypotheses based at least in part on the estimated position information and the map information, wherein managing the hypotheses comprises adding, eliminating and combining hypotheses; g) processing the managed hypotheses to update the estimated position information for the portable device; and h) providing an enhanced navigation solution using the updated estimated position information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A portable device for providing an enhanced navigation solution using map information comprising:
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a) a sensor assembly integrated with the portable device, configured to output data representing motion of the portable device; and b) a processor configured to implement; i) a navigation module for deriving a navigation solution based at least in part on the sensor data; and ii) a map module having a position estimator for providing estimated position information for the portable device based at least in part on the navigation solution, a map handler for obtaining map information for an area encompassing a current location of the user and a hypothesis analyzer for generating and managing multiple hypotheses regarding possible positions of the portable device based at least in part on the estimated position information and the map information, wherein the map module processes the managed hypotheses to update the estimated position information for the portable device, wherein managing multiple hypotheses comprises adding, eliminating and combining hypotheses. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. A system for providing an enhanced navigation solution using map information comprising:
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a) a portable device with an integrated sensor assembly, configured to output data representing motion of the portable device and a processor configured to implement a navigation module for deriving a navigation solution based at least in part on the sensor data; and b) remote processing resources configured to receive the navigation solution from the portable device and having a processor configured to implement a map module having a position estimator for providing estimated position information for the portable device based at least in part on the navigation solution, a map handler for obtaining map information for an area encompassing a current location of the user and a hypothesis analyzer for generating and managing multiple hypotheses regarding possible positions of the portable device based at least in part on the estimated position information and the map information, wherein the map module processes the managed hypotheses to update the estimated position information for the portable device wherein the remote processing resources transmit the updated estimated position information to the portable device, wherein managing multiple hypotheses comprises adding, eliminating and combining hypotheses. - View Dependent Claims (41, 42, 43, 44)
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Specification