Portable navigation device with integrated GPS and dead reckoning capabilities
DCFirst Claim
1. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps if:
- determining a current position of the device using the GPS receiver so as to calculate a route through a network of thoroughfares;
if the determination of the current position as determined by the GPS receiver is at least partially degraded, determining the current position of the device using the dead reckoning positioning functionality; and
if the determination of the current position as determined by the GPS receiver is substantially accurate, calibrating the dead reckoning functionality using the GPS receiver.
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Abstract
Apparatus, systems and methods are provided for portable navigation devices with various integrated positioning functionality. The apparatus includes a portable electronic device having a processor in communication with a memory. The memory is adapted to store navigation related data. The navigation related data includes cartographic data including a number of locations and data indicative of thoroughfares of a plurality of types connecting certain ones of the locations. The portable electronic device includes a GPS receiver adapted to communicate with the memory and processor. And, the portable electronic device includes a dead reckoning component, including a rate gyro, pedometer, and/or accelerometer adapted to communicate to memory and processor.
334 Citations
29 Claims
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1. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps if:
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determining a current position of the device using the GPS receiver so as to calculate a route through a network of thoroughfares;
if the determination of the current position as determined by the GPS receiver is at least partially degraded, determining the current position of the device using the dead reckoning positioning functionality; and
if the determination of the current position as determined by the GPS receiver is substantially accurate, calibrating the dead reckoning functionality using the GPS receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps of:
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determining a current position of the portable navigation device using the GPS receiver calculating a route through a network of thoroughfares represented by a set of data;
if the determination of the current position as determined by the GPS receiver is at least partially degraded, determining the current position of the device using the dead reckoning positioning functionality so as to continue calculating the route;
if the determination of the current position as determined by the GPS receiver is substantially accurate, calibrating the dead reckoning functionality using the GPS receiver; and
if the determination of the current position as determined by the dead reckoning functionality is substantially accurate, calibrating the GPS receiver using the dead reckoning functionality. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A portable electronic device, comprising:
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a memory to store navigation related data, the navigation related data including data indicative of thoroughfares;
a GPS receiver for determining a current position of the electronic device;
a dead reckoning component;
a processor adapted to communicate with the memory, GPS receiver, and dead reckoning component, wherein the processor is operable to calculate a route through the thoroughfares and is further operable to calibrate the GPS receiver using the dead reckoning component; and
a portable housing for storing the GPS receiver, the dead reckoning component, and the processor. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A portable electronic device, comprising:
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a memory adapted to store navigation related data, the navigation related data including data indicative of thoroughfares;
a GPS receiver for determining a current position of the electronic device;
a dead reckoning component for determining the current position, such that when the current position as determined by the GPS receiver is partially degraded, the current position as determined by the dead reckoning component may be used to supplement the current position as determined by the GPS receiver;
a processor adapted to communicate with the memory, GPS receiver, and dead reckoning component and further operable to calibrate the GPS receiver using the current position as determined by the dead reckoning component;
a display operable to display the current position of the device; and
a portable housing including the memory, the GPS receiver, the dead reckoning component, the processor and the display.
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25. The portable electronic device of claim 24, wherein the dead reckoning component includes at least one component selected from the group of a rate gyro, a pedometer, and an accelerometer.
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26. The portable electronic device of claim 24, wherein the thoroughfares include at least one thoroughfare selected from the group of a road, a street, a highway, and an interstate.
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27. The portable electronic device of claim 24, wherein the device is selected from the group of a PDA-enabled device and a cell phone-enabled device.
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28. The portable electronic device of claim 27, where the PDA-enabled device include a compass and an internal power supply.
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29. The portable electronic device of claim 24, wherein the device uses audio and visual guidance direct a user of the device.
Specification