Map data delivering method for communication-type navigation system
First Claim
1. A method for transmitting map data in a communication type navigation system, wherein a center server for transmitting the map data in the system executes the steps of:
- receiving information of a current location and a destination from an on-vehicle terminal;
searching for a traveling route between the current location to be a starting place and the destination based on those information, and making guidance information on the searched traveling route; and
when transmitting traveling route information including the traveling route or the guidance information and plural map information blocks into which map information on the traveling route is divided, placing the map information blocks in the order of priority for transmission, and transmitting the map information blocks according to the order of priority.
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Accused Products
Abstract
In a communication type navigation system that downloads maps, the present invention provides a map data transmission method that can reduce time before guiding is started. A map provision server searches for a traveling route connecting a starting place corresponding to current position information received from an on-vehicle terminal and a destination corresponding to destination information. The server generates guidance information for guiding the vehicle along the searched traveling route and generates a route vicinity map along the traveling route. The server generates traveling route information comprising the searched traveling route and the guidance information, and plural map information blocks into which the route vicinity map containing map information is divided along the traveling route, assigns transmission priority levels to the map information blocks, and transmits the map information blocks according to the transmission priority levels after transmitting the traveling route information.
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Citations
12 Claims
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1. A method for transmitting map data in a communication type navigation system, wherein a center server for transmitting the map data in the system executes the steps of:
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receiving information of a current location and a destination from an on-vehicle terminal;
searching for a traveling route between the current location to be a starting place and the destination based on those information, and making guidance information on the searched traveling route; and
when transmitting traveling route information including the traveling route or the guidance information and plural map information blocks into which map information on the traveling route is divided, placing the map information blocks in the order of priority for transmission, and transmitting the map information blocks according to the order of priority. - View Dependent Claims (2, 5, 6)
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3. A method for transmitting map data in a communication type navigation system, wherein a center server for transmitting the map data in the system executes the steps of:
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receiving information of a current location and a destination from an on-vehicle terminal;
searching for a traveling route between the current location to be a starting place and the destination based on those information, and making guidance information on the searched traveling route; and
when transmitting traveling route information including the traveling route or the guidance information and plural map information blocks into which map information on the traveling route is divided based on distances from the traveling route, placing the map information blocks in the order of priority for transmission, and transmitting the map information blocks according to the order of priority. - View Dependent Claims (4)
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7. An on-vehicle terminal in a communication type navigation system, comprising the functions of:
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transmitting information of a current location and a destination to a map data provision center server;
receiving information of the traveling route searched for by the center server based on information of the current location and the destination, and plural map information blocks from the center server, wherein the traveling route is a route between the current location to be a starting place and the destination, and plural map information blocks are blocks into which map information on the traveling route is divided along the traveling route;
upon receiving the traveling route information, starting navigation that instructs a guidance direction to a next guidance point, a road name relating to the next guidance point, an intersection name relating to the next guidance point, a point name relating to the next guidance point, a distance of up to the next guidance point, or a distance of up to a destination, with a display or a voice.
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8. An on-vehicle terminal in a communication type navigation system, executing the functions of:
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transmitting information of a current location and a destination to a map data provision center server;
receiving information of a traveling route searched for by the center server based on information of the current location and the destination, wherein the traveling route is a route between the current location to be a starting place and the destination;
receiving a map information block in the vicinity of the starting place earlier than other map information blocks; and
upon receiving the traveling route information and the map information blocks in the vicinity of the starting place, displaying a map on screen in the vicinity of the starting place to start navigation. - View Dependent Claims (9, 10, 11, 12)
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Specification