Communication navigation system, communication navigation method, route guidance information transmitting device, and terminal unit

• US 20030109983A1
• Filed: 10/04/2002
• Published: 06/12/2003
• Est. Priority Date: 10/05/2001
• Status: Active Grant

• Current Assignee: Increment P Corporation (Pioneer Corporation), Pioneer Corporation
• Original Assignee: Increment P Corporation (Pioneer Corporation), Pioneer Corporation
• Inventors: Takenaga, Takashi
• Granted Patent: US 6,879,908 B2
• Time in Patent Office: Days
• US Class Current: 701/202
• CPC Class Codes: G01C 21/34 Route searching; Route guidance
• CPC Class Codes: G08G 1/0969 having a display in the form of a map

Abstract

A communication navigation method comprises a first procedure in which a terminal unit requests a server to transmit an information segment necessary for a first current part of guidance via the Internet, a second procedure in which the server transmits to the terminal unit the information segment requested by the first procedure, via the Internet, a third procedure in which after the second procedure, the terminal unit requests the server to transmit an information segment necessary for a second current part of the guidance via the Internet, and a fourth procedure in which the server transmits to the terminal unit the information segment requested by the third procedure, via the Internet. The information segment transmitted by the fourth procedure is an update of the information segment transmitted by the second procedure.

Claims

1. A communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, the communication navigation method comprising:

a requesting process in which the navigation terminal requests the server to transmit an information necessary for an immediate part of guidance via the communication network; and

a transmitting process in which the server transmits the requested information to the navigation terminal via the communication network,

wherein the server transmits updated information to the navigation terminal when the server receives the request from the navigation terminal.

2. The communication navigation method according to claim 1, wherein each of the information segments comprises route information indicative of a route.

3. The communication navigation method according to claim 1, wherein each of the information segments comprises guidance information used to implement the guidance.

4. A communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, the communication navigation method comprising:

a first procedure in which the navigation terminal requests the server to transmit an information segment necessary for a first current part of guidance via the communication network;

a second procedure in which the server transmits to the navigation terminal the information segment requested by the first procedure, via the communication network;

a third procedure in which after the second procedure, the navigation terminal requests the server to transmit an information segment necessary for a second current part of the guidance via the communication network; and

a fourth procedure in which the server transmits to the navigation terminal the information segment requested by the third procedure, via the communication, network,

wherein the information segment transmitted by the fourth procedure is an update of the information segment transmitted by the second procedure.

5. The communication navigation system according to claim 4, wherein each of the information segments comprises route information indicative of a route.

6. The communication navigation system according to claim 4, wherein each of the information segments comprises guidance information used to implement the guidance.

7. A communication navigation system for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, the communication navigation system comprising:

a navigation terminal which requests a server to transmit an information necessary for an immediate part of guidance via the communication network; and

a server which transmits the requested information to the navigation terminal via the communication network,

wherein the server transmits updated information to the navigation terminal when the server receives the request from the navigation terminal.

8. The communication navigation system according to claim 7, wherein each of the information segments comprises route information indicative of a route.

9. The communication navigation system according to claim 7, wherein each of the information segments comprises guidance information used to implement the guidance.

10. A communication navigation system for implementing a communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, the communication navigation method comprising:

a first procedure in which the navigation terminal requests the server to transmit an information segment necessary for a first current part of guidance via the communication network;

a second procedure in which the server transmits to the navigation terminal the information segment requested by the first procedure, via the communication network;

a third procedure in which after the second procedure, the navigation terminal requests the server to transmit an information segment necessary for a second current part of the guidance via the communication network; and

a fourth procedure in which the server transmits to the navigation terminal the information segment requested by the third procedure, via the communication network,

wherein the information segment transmitted by the fourth procedure is an update of the information segment transmitted by the second procedure.

11. The communication navigation system according to claim 10, wherein each of the information segments comprises route information indicative of a route.

12. The communication navigation system according to claim 10, wherein each of the information segments comprises guidance information used to implement the guidance.

13. A terminal unit that implements a communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, as the navigation terminal, the communication navigation method comprising:

a requesting process in which the navigation terminal requests the server to transmit an information necessary for an immediate part of guidance via the communication network; and

a transmitting process in which the server transmits the requested information to the navigation terminal via the communication network,

wherein the server transmits updated information to the navigation terminal when the server receives the request from the navigation terminal.

14. The terminal unit according to claim 13, wherein each of the information segments comprises route information indicative of a route.

15. The terminal unit according to claim 13, wherein each of the information segments comprises guidance information used to implement the guidance.

16. A terminal unit that implements a communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, as the navigation terminal, the communication navigation method comprising:

a first procedure in which the navigation terminal requests the server to transmit an information segment necessary for a first current part of guidance via the communication network;

a second procedure in which the server transmits to the navigation terminal the information segment requested by the first procedure, via the communication network;

a third procedure in which after the second procedure, the navigation terminal requests the server to transmit an information segment necessary for a second current part of the guidance via the communication network; and

a fourth procedure in which the server transmits to the navigation terminal the information segment requested by the third procedure, via the communication network,

wherein the information segment transmitted by the fourth procedure is an update of the information segment transmitted by the second procedure.

17. The terminal unit according to claim 16, wherein each of the information segments comprises route information indicative of a route.

18. The terminal unit according to claim 16, wherein each of the information segments comprises guidance information used to implement the guidance.

19. A navigation terminal unit that implements a communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network,

wherein the server transmits an information necessary for an immediate part of guidance requested from the navigation terminal to the navigation terminal via the communication network, and

the navigation terminal requests the server to transmit an information necessary for an immediate part of guidance via the communication network.

20. The terminal unit according to claim 19, wherein each of the information segments comprises route information indicative of a route.

21. The terminal unit according to claim 19, wherein each of the information segments comprises guidance information used to implement the guidance.