Communications type navigation device
First Claim
1. A communications-type navigation device, comprising:
- a position measuring unit which measures a position of a self-terminal device;
a destination place setting unit which sets destination place information;
a communicator which performs transmission/reception of map data including at least one of wide area map data and detailed map data with an information center;
a route guide which performs route guidance to said destination place; and
a driving state monitor which monitors a driving state of a self-vehicle, wherein said communicator transmits, to said information center, present place information obtained by said position measuring unit, said destination place information as set by said destination place setting unit and download area information, which is modified dynamically depending on the driving state of the self-vehicle indicated by said driving state monitor, to download a larger area of map data when the self-vehicle is operated at high speed, and receives route information and guiding point information up to said destination place which have been transmitted from said information center, and wherein said route guide includes a judging unit which judges whether or not said self-terminal device has deviated from said route from said received route information and said position information measured by said position measuring unit, and a determining unit which determines, if said self-terminal device is judged to have deviated, whether or not to request said information center to perform a route calculation to said destination place according to an input to a prompt by a user in correspondence with said driving state detected by said driving state monitor.
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Accused Products
Abstract
There is provided a communications-type car navigation system including a vehicle-mounted terminal and a server. When transferring, to the terminal, the result of a route searching which the server has performed, the server transfers the data that will satisfy the requirements of a route guiding method which the user wishes. Also, the server transfers the route data that has been compressed. Concerning the map data as well, the server transfers only the necessary attributes thereof. Moreover, the following conditions allow the operability to be enhanced: the selection of a map transferring method and the route guiding method where the driving state has been taken into consideration, and the selection of a guiding unit which the user wishes.
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Citations
17 Claims
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1. A communications-type navigation device, comprising:
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a position measuring unit which measures a position of a self-terminal device;
a destination place setting unit which sets destination place information;
a communicator which performs transmission/reception of map data including at least one of wide area map data and detailed map data with an information center;
a route guide which performs route guidance to said destination place; and
a driving state monitor which monitors a driving state of a self-vehicle, wherein said communicator transmits, to said information center, present place information obtained by said position measuring unit, said destination place information as set by said destination place setting unit and download area information, which is modified dynamically depending on the driving state of the self-vehicle indicated by said driving state monitor, to download a larger area of map data when the self-vehicle is operated at high speed, and receives route information and guiding point information up to said destination place which have been transmitted from said information center, and wherein said route guide includes a judging unit which judges whether or not said self-terminal device has deviated from said route from said received route information and said position information measured by said position measuring unit, and a determining unit which determines, if said self-terminal device is judged to have deviated, whether or not to request said information center to perform a route calculation to said destination place according to an input to a prompt by a user in correspondence with said driving state detected by said driving state monitor. - View Dependent Claims (2, 3, 4, 5)
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6. A communications-type navigation device, comprising:
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a communicator which performs transmission/reception of data;
a storage which stores said received data; and
a map display which displays a map, wherein said communicator transmits, to an information center, a map request for specifying position information, scale information, and download area information, which is modified dynamically depending on a driving state of a vehicle, to download a larger area of the map when the vehicle is operated at high speed, said storage stores map data transmitted from said information center, said map display displaying said stored map data.
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7. A communications-type navigation device comprising:
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a communicator which performs transmission/reception of map data;
a storage which stores said received data which include at least one of wide area map data and detailed map data;
a map display which displays a map, a map requesting unit which issues a map information request to said information center; and
a driving state judging unit which differentiates a driving state of a vehicle, wherein said map requesting unit determines whether or not to communicate said map request according to an input to a prompt by a user in correspondence with said driving state of said vehicle acquired by said driving state judging unit, and wherein said communicator transmits, to an information center, a map request for specifying position information, scale information and downloaded area information, which is modified dynamically depending on the driving state of said vehicle indicated by said driving state judging unit, to download a larger area of the map when said vehicle is operated at high speed, said storage stores said map data transmitted from said information center, and said map display displays said stored map data. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification