Electronic navigation system and method
First Claim
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1. A method for providing improved navigation services to a plurality of mobile units, the method comprising:
- on a mobile unit comprising a first navigation system that includes a first geographic database and a navigation application program, receiving input from a user for a desired navigation function to which a response requires geographic data;
from the mobile unit, using said navigation application program to transmit a request for part of said geographic data that is not up-to-date in said first geographic database determined by said program as required to provide said desired navigation function;
on a base unit comprising a more up-to-date geographic database than said first geographic database, receiving said request and providing said part of said geographic data using said more up-to-date geographic database;
from said base unit, transmitting said part of said geographic data to said mobile unit; and
in said mobile unit, receiving said part of said geographic data from said base unit and using said part of said geographic data received from said base unit along with data from said first geographic database to provide said desired navigation function to said user.
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Abstract
The invention provides a system for providing geographic information. The system includes a mobile unit having a first geographic database and a base unit having a second geographic database that is more up-to-date than the first geographic database. The base unit receives a request from a mobile unit for updated geographic data. The base unit identifies a portion of the second geographic database that corresponds to the request and provides a response to the mobile unit comprising the identified portion of the second geographic database.
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Citations
19 Claims
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1. A method for providing improved navigation services to a plurality of mobile units, the method comprising:
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on a mobile unit comprising a first navigation system that includes a first geographic database and a navigation application program, receiving input from a user for a desired navigation function to which a response requires geographic data; from the mobile unit, using said navigation application program to transmit a request for part of said geographic data that is not up-to-date in said first geographic database determined by said program as required to provide said desired navigation function; on a base unit comprising a more up-to-date geographic database than said first geographic database, receiving said request and providing said part of said geographic data using said more up-to-date geographic database; from said base unit, transmitting said part of said geographic data to said mobile unit; and in said mobile unit, receiving said part of said geographic data from said base unit and using said part of said geographic data received from said base unit along with data from said first geographic database to provide said desired navigation function to said user. - View Dependent Claims (2, 3, 4, 5)
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6. A system for providing geographic information comprising:
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a mobile unit having a first geographic database; a base unit having a second geographic database that is more up-to-date than said first geographic database; and a communications link to transmit a request from the mobile unit to the base unit and to transmit a response from the base unit to the mobile unit; wherein said base unit receives said request for updated geographic data, identifies a portion of said second geographic database that corresponds to said request, and provides said response to said mobile unit comprising said identified portion of said second geographic database. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for providing improved navigation services comprising:
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a mobile unit; a base unit; and a communications link to transmit a query from the mobile unit to the base unit and to transmit a response from the base unit to the mobile unit; wherein said base unit receives said query from said mobile unit that includes a current position of said mobile unit, evaluates said current position of said mobile unit to determine if said current position is inconsistent with previously specified location information, attempts to resolve said inconsistent current position, if said base unit cannot resolve said inconsistent current position, provides a response to said mobile unit indicating an error. - View Dependent Claims (16, 17, 18, 19)
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Specification