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US 6,807,484 B2Granted
Navigation system, hand-held terminal, data transfer system and programs executed therein
AssigneeDenso Corporation
InventorsAkira Inoue, Toru Yamazaki, Kazuyoshi Azuma
Life of this patent
Estimating the term…
Abstract
When there is no continuity between a current position data acquired by the car navigation system and a previous position data acquired by the car navigation system, the car navigation system determines a current position of a vehicle based on position data transmitted from a personal digital assistant (PDA). In this way, the current position of the vehicle can be determined immediately.
Claims12
A navigation system for a vehicle, the navigation system comprising:
- a position data receiving means for receiving at least one set of position data from a hand-held terminal, wherein each of the at least one set of position data indicates a corresponding position of the hand-held terminal;
- a position data acquiring means for acquiring successive sets of position data based on a GPS signal transmitted from at least one GPS satellite, wherein each of the successive sets of position data indicates a corresponding position of the vehicle;
- and
- a control means that executes at least one predetermined process based on at least one of the successive sets of the position data, which are acquired by the position data acquiring means, wherein:
- the control means checks existence of the continuity between a current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means at a predetermined interval;
- when the control means determines that the continuity between the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means, exists, the control means determines a current position of the vehicle based on the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means, and
- when the control means determines that the continuity between the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means, does not exist, the control means uses the current set of position data, which is acquired by the position data acquiring means, and one of the at least one set of position data, which is received from the hand-held terminal, only upon existence of continuity between the current set of position data, which is acquired by the position data acquiring means, and the one of the at least one set of position data, which is received from the hand-held terminal.
4 more elements
The data transfer system comprising a hand-held terminal and a navigation system, wherein:
- the hand-held terminal includes:
- a position data acquiring means for acquiring at least one set of position data, wherein each of the at least one set of position data indicates a corresponding position of the hand-held terminal, and the position data acquiring means includes a network-assisted positioning type GPS positioning means for performing GPS positioning with aid of network assistance based on a GPS signal transmitted from at least one GPS satellite;
- a position data transmitting means for transmitting the at least one set of position data, which is acquired by the position data acquiring means;
- and
- a control means that transmits the at least one set of position data, which is acquired by the position data acquiring means, from the position data transmitting means to the navigation system;
- the navigation system is for a vehicle and includes:
- a position data receiving means for receiving the at least one set of position data from the hand-held terminal;
- a position data acquiring means for acquiring successive sets of position data based on a GPS signal transmitted from at least one GPS satellite, wherein each of the successive sets of position data, which are acquired by the position data acquiring means of the navigation system, indicates a corresponding position of the vehicle;
- and
- a control means that executes at least one predetermined process based on at least one of the successive sets of the position data, which are acquired by the position data acquiring means of the navigation system;
- the control means of the navigation system checks existence of continuity between a current set of position data and a previous set of position data, both of which are acquired by the position data acquiring means of the navigation system at a predetermined interval;
- when the control means of the navigation system determines that the continuity between the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means of the navigation system, exists, the control means of the navigation system determines a current position of the vehicle based on the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means of the navigation system;
- and
- when the control means of the navigation system determines that the continuity between the current set of position data and the previous set of position data, both of which are acquired by the position data acquiring means of the navigation system, does not exist, the control means of the navigation system uses the current set of position data, which is acquired by the position data acquiring means of the navigation system, and one of the at least one set of position data, which is acquired by the position data acquiring means of the hand-held terminal, only upon existence of continuity between the current set of position data, which is acquired by the position data acquiring means of the navigation system, and the one of the at least one set of position data, which is acquired by the position data acquiring means of the hand-held terminal.
11 more elements
Dependencies are inferred from the claim text.