Electronic navigation system and method
First Claim
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1. A system for providing geographic information comprising:
- a base unit having a geographic database;
a mobile unit; 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 comprising an origin of said mobile unit, a point of interest category and a traveling distance limit, identifies paths represented in the geographic database searching outward from said origin over which the mobile unit could travel to a point of interest matching said point of interest category;
evaluates a driving distance for said identified paths to said point of interest matching said point of interest category to identify a point of interest matching said point of interest category and having said driving distance less than said driving limit, and provides a response to said mobile unit identifying said point of interest matching said point of interest category and having said driving distance less than said driving distance limit.
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Abstract
The invention provides a system for providing geographic information. The system includes a base unit that receives a request from a mobile unit and provides a response to the mobile unit. The request includes a point of interest category and a traveling distance or traveling time parameter. The base unit identifies a point of interest that matches the point of interest category and satisfies the traveling distance or traveling time parameter. The response from the base unit to the mobile unit provides the identified point of interest.
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Citations
20 Claims
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1. A system for providing geographic information comprising:
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a base unit having a geographic database;
a mobile unit; 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 comprising an origin of said mobile unit, a point of interest category and a traveling distance limit, identifies paths represented in the geographic database searching outward from said origin over which the mobile unit could travel to a point of interest matching said point of interest category;
evaluates a driving distance for said identified paths to said point of interest matching said point of interest category to identify a point of interest matching said point of interest category and having said driving distance less than said driving limit, and provides a response to said mobile unit identifying said point of interest matching said point of interest category and having said driving distance less than said driving distance limit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing geographic information from a base unit to a plurality of mobile units, the method comprising:
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receiving a request at said base unit for information regarding a point of interest from one of said mobile units, said request including a point of interest category and a travel time limit;
searching outward from a current position of said mobile unit for road segments that may be traveled from said current position to reach a point of interest matching said point of interest category, wherein said base unit searches using a geographic database having data representing said road segments and data representing said point of interest; and
determining a travel time required for traveling from said current position to said point of interest matching said point of interest category to identify a point of interest matching said point of interest category and having said travel time less than said travel time limit;
providing a response from said base unit to said mobile unit identifying said point of interest matching said point of interest category and having said travel time less than said travel time limit. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for providing geographic information comprising:
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a base unit;
a geographic database associated with said base unit, said geographic database having data representing a plurality of road segments in a geographic region and data representing a plurality of points of interest in said geographic region; and
a mobile unit;
wherein said base unit receives a request from said mobile unit, said request comprising a point of interest category and a traveling distance or traveling time parameter, searches outward from a current position of the mobile unit to identify road segments over which the mobile unit could travel to a point of interest matching said point of interest category, evaluates said road segments over which the mobile unit could travel to a point of interest matching said point of interest category to identify a point of interest matching said point of interest category and satisfying said traveling distance or traveling time parameter, and provides a response to said mobile unit indicating said point of interest matching said point of interest category and satisfying said traveling distance or traveling time parameter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification