Method and system for real-time navigation using mobile telephones
First Claim
1. A method for determining a user'"'"'s location comprising:
- recording at least one travel path for a user;
generating a plurality of path locations along the at least one travel path;
generating a position signal;
comparing the position signal with the plurality of locations along the at least one travel path;
determining a first approximation of the user'"'"'s location based upon the comparison of the position signal with the plurality of locations along the at least one travel path.
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Abstract
In an Interactive Real-Time Distributed Navigation system a method and system is disclosed for implementing a warm start/cold start option. Through selection of the warm start option, an interactive session for providing navigational directions to a user is more quickly established because a user'"'"'s position is assumed not to be ambiguous. A method of the invention verifies this assumption. Through selection of the cold start option, the method of the invention seeks to remove ambiguity in a user'"'"'s position before providing navigational directions. If, however, a user'"'"'s position is not ambiguous, the method of the invention reverts to a warm start condition to immediately transmit navigational directions to the user.
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Citations
23 Claims
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1. A method for determining a user'"'"'s location comprising:
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recording at least one travel path for a user;
generating a plurality of path locations along the at least one travel path;
generating a position signal;
comparing the position signal with the plurality of locations along the at least one travel path;
determining a first approximation of the user'"'"'s location based upon the comparison of the position signal with the plurality of locations along the at least one travel path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23)
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16. A method for presenting navigational directions to a user, comprising:
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generating a first signal indicating a first mode operation;
assigning a starting location responsive to the first signal;
determining a path from the starting location toward a destination;
generating navigational directions to guide the user from the starting location to the destination;
presenting the navigational directions to the user; and
removing ambiguity in the starting location to generate an improved starting location.
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Specification