Communication-type navigation apparatus and server device

A communication type navigation apparatus which can communicate with a server device via a communication path, the server device comprises a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;

• a determination unit which determines meshes corresponding to road zone, other than a highway zone, of roads on the searched route:
• and a transmission unit which transmits mesh identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus, the communication-type navigation apparatus comprising:
• a map data storage unit which stores mesh data;
• and
• a mesh request unit which compares the mesh identification information and the updating information transmitted from the server device with the mesh identification information and the updating information stored in the map data storage unit to determine the mesh data to be obtained from the server device and which requests the determined mesh data to the server device.

A server device which can communicate with a communication-type navigation apparatus via a communication path, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a mesh determination unit which determines meshes corresponding to predetermined road zone on the searched route:
• and
• a transmission unit which transmits mesh identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus.

A communication type navigation apparatus which can communicate with a server device via a communication path, the server device comprises a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;

• a mesh determination unit which determines meshes corresponding to predetermined road zone on the searched route:
• and a transmission unit which transmits mesh identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus, the communication-type navigation apparatus comprising:
• a map data storage unit which stores mesh data;
• and
• a mesh request unit which compares the mesh identification information and the updating information transmitted from the server device with the mesh identification information and the updating information stored in the map data storage unit to determine the mesh data to be obtained from the server device and which requests the determined mesh data to the server device.

A server device which can communicate with a communication-type navigation apparatus via a communication path, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a determination unit which determines meshes necessary to travel along the searched route;
• and
• a transmission unit which transmits mesh identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus.

A communication type navigation apparatus which can communicate with a server device via a communication path, the server device comprising a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;

• a determination unit which determines meshes necessary to travel along the searched route;
• and a transmission unit which transmits mesh identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus, the communication-type navigation apparatus comprising:
• a map data storage unit which stores a plurality of mesh data;
• and
• a mesh request unit which compares the mesh identification information and the updating information of the meshes necessary to travel along the searched route with the mesh identification information and the updating information stored in the map data storage unit to determine the mesh data to be obtained from the server device, and which requests the determined mesh data to the server device.

A server device which can communicate with a communication-type navigation apparatus, comprising:

• a map database which stores a plurality of mesh data;
• a search unit which receives a route search request from the communication-type navigation apparatus, which executes route search to produce route information of a searched route and which transmits the route information to the communication-type navigation apparatus;
• and
• an updating data transmission unit which receives the mesh identification information and updating information of the mesh data, that is necessary to travel along the searched route and that is stored in the communication-type navigation apparatus, which obtains mesh data, having the updating information newer than that of the mesh data stored in the communication-type navigation apparatus, from the map database, and which transmits the obtained mesh data to the communication-type navigation apparatus.

A communication-type navigation apparatus which can communicate with a server device via a communication path, the server device comprising a map database which stores a plurality of mesh data;

• a search unit which receives a route search request from the communication-type navigation apparatus, which executes route search to produce route information of a searched route and which transmits the route information to the communication-type navigation apparatus;
• and an updating data transmission unit which receives the mesh identification information and updating information of the mesh data, that is necessary to travel along the searched route and that is stored in the communication-type navigation apparatus, which obtains mesh data, having the updating information newer than that of the mesh data stored in the communication-type navigation apparatus, from the map database, and which transmits the obtained mesh data to the communication-type navigation apparatus, the navigation apparatus comprising:
• a map data storage unit which stores a plurality of mesh data;
• and
• an updating information transmission unit which receives the route information, which determines the mesh data necessary to travel along the searched route, and which transmits the mesh identification information and the updating information of the mesh data stored in the map data storage unit, out of the mesh data necessary to travel along the searched route, to the server device.

A server device which can communicate with a communication-type navigation apparatus via a communication path, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a mesh determination unit which determines meshes necessary to travel along the searched route;
• a unit which determines whether or not the processing burden of the server device is higher than a predetermined burden level at the time when the server device receives the route search request;
• and
• a transmission unit which transmits the route information to the communication-type navigation unit when the processing burden of the server device is higher than the predetermined processing burden level, and transmits the mesh identification information and the updating information as well as the route information to the communication-type navigation apparatus when the processing burden of the server device is not higher than the predetermined burden level.

A server device which can communicate with a communication-type navigation apparatus via a communication path, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a determination unit which determines blocks including meshes necessary to travel along the searched route;
• and
• a transmission unit which transmits block identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus.

A communication type navigation apparatus which can communicate with a server device via a communication path, the server device comprising a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;

• a determination unit which determines blocks including meshes necessary to travel along the searched route;
• and a transmission unit which transmits block identification information and updating information of the determined meshes, and the route information, to the communication-type navigation apparatus, the communication-type navigation apparatus comprising:
• a map data storage unit which stores a plurality of mesh data;
• and
• a mesh request unit which compares the mesh identification information and the updating information of the meshes included in the block whose block identification is received with the mesh identification information and the updating information stored in the map data storage unit to determine the mesh data to be obtained from the server device, and which requests the determined mesh data to the server device.

A server device which can communicate with a communication-type navigation apparatus, comprising:

• a map database which stores a plurality of mesh data;
• a search unit which receives a route search request from the communication-type navigation apparatus, which executes route search to produce route information of a searched route and which transmits the route information to the communication-type navigation apparatus;
• and
• an updating data transmission unit which receives the mesh identification information and updating information of the mesh data of blocks including meshes necessary to travel along the searched route, which obtains mesh data of the blocks, having the updating information newer than that of the blocks received, from the map database, and which transmits the obtained mesh data to the communication-type navigation apparatus.

A communication-type navigation apparatus which can communicate with a server device via a communication path, the server device comprising a map database which stores a plurality of mesh data;

• a search unit which receives a route search request from the communication-type navigation apparatus, which executes route search to produce route information of a searched route and which transmits the route information to the communication-type navigation apparatus;
• and an updating data transmission unit which receives the mesh identification information and updating information of the mesh data of blocks including meshes necessary to travel along the searched route, which obtains mesh data of the blocks, having the updating information newer than that of the blocks received, from the map database, and which transmits the obtained mesh data to the communication-type navigation apparatus, the navigation apparatus comprising:
• a map data storage unit which stores a plurality of mesh data;
• and
• an updating information transmission unit which receives the route information, which determines the blocks including the meshes necessary to travel along the searched route, and which transmits the block identification information and the updating information to the server device.

A server device which can communicate with a communication-type navigation apparatus, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a layer selection unit which selects layer of the mesh data necessary to travel along the searched route based on the route information;
• and
• a transmission unit which transmits layer data of the selected layer and the route information to the communication-type navigation apparatus.

A server device which can communicate with a communication-type navigation apparatus, comprising:

• a search unit which receives a route search request from the communication-type navigation apparatus and executes route search to produce route information of a searched route;
• a layer selection unit which selects layer of the mesh data necessary to travel along the searched route based on the route information;
• and
• a transmission unit which transmits identification information and updating information of layer data of the selected layer and the route information to the communication-type navigation apparatus.