METHOD FOR OPERATING A NAVIGATION DEVICE AND A CORRESPONDING NAVIGATION DEVICE

• US 20090299618A1
• Filed: 10/23/2006
• Published: 12/03/2009
• Est. Priority Date: 11/16/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Krishnan, Kishore, Cornelius, Rainer, Pfeiffer, Heinz-Werner, Duckeck, Ralf
• Granted Patent: US 8,612,144 B2
• Time in Patent Office: Days
• US Class Current: 701/200
• CPC Class Codes: G01C 21/3691 Retrieval, searching and output of information related to real-time traffic, weather, or environmental conditions arrangements for giving variable traffic instructions G08G1/09
• CPC Class Codes: G08G 1/094 Hardware aspects; Signal processing or signal properties, e.g. frequency bands
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 60/54 where broadcast information is generated

Abstract

In order to provide a method for operating a navigation device, which also receives TMC data using two tuners for ascertaining an optimum travel route, using which an optimal travel route is ascertainable using the largest amount of TMC data possible, after a first search by the second tuner, the TMC data found are compared with those of the first tuner and to use the second tuner for searching for another transmitter having other TMC data. Furthermore, a navigation device of an appropriate design is provided.

Claims

1-10. -10. (canceled)

11. A method for operating a navigation device that also receives TMC data using two tuners for ascertaining an optimum travel route, comprising:

a first search by a second tuner, comparing TMC data found with TMC data of a first tuner to search for another transmitter having other TMC data using the second tuner.

12. The method according to claim 11, wherein the TMC data of another country are received.

13. The method according to claim 11, wherein the TMC data of another country are received when approaching an international border.

14. The method according to claim 11, wherein a transmitter belonging to the transmitter chain of a preferred TMC transmitter is searched for.

15. The method according to claim 11, wherein a transmitter having a same regional database identification number as a preferred TMC transmitter is searched for.

16. The method according to claim 11, wherein, in an automatic mode, the second tuner searches for a TMC transmitter having a highest possible reception quality.

17. A navigation device, comprising:

two additional tuners for receiving TMC data for ascertaining an optimum travel route;

wherein, after a first search by a second tuner, the TMC data are comparable with the TMC data of a first tuner and a search for another transmitter having other TMC data is performable using the second tuner.

18. The navigation device according to claim 17, wherein the TMC data of another country is receivable.

19. The navigation device according to claim 17, wherein the TMC data of another country is receivable when approaching an international border.

20. The navigation device according to claim 17, wherein a search for a transmitter belonging to the transmitter chain of a preferred TMC transmitter is performable.

21. The navigation device according to claim 17, wherein a search for a transmitter having a same regional database identification number as a preferred TMC transmitter is performable.

22. The navigation device according to claim 17, wherein, in an automatic mode, a search for a TMC transmitter having a highest possible reception quality is performable.