Electronic navigation system and method
2 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a method and system for providing route guidance and other information from a base unit to a remote unit in response to a request from the remote unit. A query is formatted at the remote unit, the query including the request, and is transmitted from the remote unit to the base unit. Requested route guidance information is calculated at the base unit in response to the query, using a large up-to-date database located at the base unit. A response to the query is formatted at the base unit, the response including route guidance information. The response is then transmitted from the base unit to the remote unit for display. The transmission is made in a compact form through the use of maneuver arms and combined maneuver arms and through the use of tokenized forms. A maneuver arm represents a road at an intersection, for depiction on a display, by one or two endpoint coordinates. The tokenized forms are expanded at the remote unit into textual driving instructions for each of one or more languages. In addition, the amount of information available at a remote unit can be increased by providing the remote unit with information from the base unit which is not adequately covered by any databases on-board the remote unit.
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Citations
35 Claims
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1-15. -15. (canceled)
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16. An information provider system comprising:
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a base unit capable of exchanging data messages with a plurality of remote units to provide multiple information services, said base unit includes a database representing geographic information and a database updater capable of receiving updating information for said database to maintain up-to-date geographic information;
wherein said multiple information services include at least;
route guidance services providing route guidance information to said remote unit for traveling along a route from an origin to a destination, said base unit uses said database to provide said route guidance information;
surroundings explorer services providing information to said remote unit identifying points of interest, if any, meeting a specified parameter requested by said remote unit, said base unit uses said database to identify said points of interest; and
tracking information services evaluating a current location of said remote unit to determine whether said remote unit has varied from said route from said origin to said destination. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An information provider system comprising:
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a base unit capable of exchanging data messages with a plurality of remote units to provide multiple information services, said base unit includes a database representing geographic information and a database updater capable of receiving updating information for said database to maintain up-to-date geographic information;
wherein said multiple information services include at least;
route guidance services providing route guidance information to said remote unit for traveling along a route from an origin to a destination, said base unit uses said database to provide said route guidance information;
tracking information services evaluating a current location of said remote unit to determine whether said remote unit has varied from said route from said origin to said destination; and
yellow-page services providing yellow page information to said remote unit. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. An information provider system comprising:
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a base unit capable of exchanging data messages with a plurality of remote units to provide multiple information services, said base unit includes a database representing geographic information and a database updater capable of receiving updating information for said database to maintain up-to-date geographic information;
wherein said multiple information services include at least;
route guidance services providing route guidance information to said remote unit for traveling along a route from an origin to a destination, said base unit uses said database to provide said route guidance information;
tracking information services obtaining a current location of said remote unit and evaluating said current location of said remote unit to determine whether said remote unit has varied from said route from said origin to said destination; and
time and distance estimator services providing information indicating a time of travel or a distance of travel between a specified first location and a specified second location, said base unit uses said database to provide said information indicating said time of travel or said distance of travel. - View Dependent Claims (31, 32, 33, 34, 35)
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Specification