Navigation system
First Claim
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1. A navigation system comprising:
- a first navigation module having a first operational state wherein the first navigation module does not estimate the current location and a second operational state wherein the first navigation module estimates a current location; and
a second navigation module that performs dead-reckoning in response to the first operational state of the first navigation module.
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Abstract
A navigation system includes a first navigation module having a first operational state wherein the first navigation module does not estimate a current location and a second operational state wherein the first navigation module estimates the current location. A second navigation module performs dead reckoning in response to the first operational state of the first navigation module.
49 Citations
27 Claims
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1. A navigation system comprising:
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a first navigation module having a first operational state wherein the first navigation module does not estimate the current location and a second operational state wherein the first navigation module estimates a current location; and
a second navigation module that performs dead-reckoning in response to the first operational state of the first navigation module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of navigation, comprising:
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(a) performing dead-reckoning from a previous position to a current position with a second navigation module in response to an occupied period of a first navigation module; and
(b) communicating the current position to the first navigation module in response to the occupied period. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of navigation, comprising:
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(a) determining a global positioning system (GPS) reception quality parameter;
(b) selecting whether to eliminate or consider a map roadway segment as a candidate map roadway segment for map matching in response to the GPS reception quality parameter. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification