Navigation system and controlling method for the motor vehicle

• US 20050080553A1
• Filed: 10/21/2003
• Published: 04/14/2005
• Est. Priority Date: 10/23/2002
• Status: Active Grant

• Current Assignee: T Map Mobility Company Limited (SK Telecom Co., Ltd.)
• Original Assignee: SK Telecom Co., Ltd.
• Inventors: Lee, Jun Woo, Na, Dong Won, Um, Bong Su
• Granted Patent: US 7,890,250 B2
• Time in Patent Office: Days
• US Class Current: 701/200
• CPC Class Codes: G01C 21/3415 Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
• CPC Class Codes: G08G 1/0968 Systems involving transmission of navigation instructions to the vehicle

Abstract

A navigation system (20) includes a transceiver unit (210), a display unit (250), an input unit (260) and an ECU (230). The transceiver unit (210) transmits a signal for demanding a detection of a navigation path to a path detecting server (10) and then receives path data which represent the navigation path from the path detecting server (10). The display unit (250) outputs the navigation path or a revised navigation path. The ECU (230) conveys data on a departure point and a destination from the input unit (260) to the transceiver unit (210) and transfers the path data from the transceiver unit (210) to the display unit (250). Further, the ECU (270) precalculates deviation-expected paths in the course of driving along the navigation path and selects the revised navigation path among the precalculated deviation-expected paths in case a present position of a mobile object deviates form the navigation path to thereby provide the revised navigation path to the display unit (250).

Claims

1. A navigation system for use in a mobile object, comprising:

a transceiver unit for transmitting a signal for demanding a detection of a navigation path, which is a short-cut path or an optimum path from a departure point to a destination, to a path detecting server via a wireless network and then receiving path data which represents the navigation path from the path detecting server via the wireless network;

a display unit for outputting the navigation path or a revised navigation path;

an input unit for inputting data on the departure point and the destination; and

an ECU for transferring the data on the departure point and the destination from the input unit to the transceiver unit, transferring the path data from the transceiver unit to the display unit, precalculating deviation-expected path data which represent deviation-expected paths in the course of driving along the navigation path, and selecting revised path data which represent the revised navigation path, among the precalculated deviation-expected path data in case a present position of the mobile object deviates from the navigation path to thereby provide the revised navigation path to the display unit.

2. The system of claim 1, further comprising a navigation sensor unit for detecting the present position of the mobile object.

3. The system of claim 2, wherein the display unit includes an audio processing unit for outputting the path data or the revised path data in the form of an audio signal and/or an image processing unit for outputting the path data or the revised path data in the form of an image signal.

4. The system of claim 3, wherein the ECU selects the revised path data among the deviation-expected path data by inspecting which of the deviation-expected paths includes the present position.

5. The system of claim 1, further comprising a memory for storing the path data and the deviation-expected path data which are transmitted from the ECU and transmitting the stored path data and the stored deviation-expected path data in case the ECU requires for the stored path data and the stored deviation-expected path data to display the stored path data and the stored deviation-expected path data through the display unit.

6. The system of claim 1, wherein the deviation-expected paths are precalculated from a plurality of deviation points to the destination, the deviation points being arbitrary places where the mobile object begins to deviate from the navigation path.

7. A method for navigating a mobile object traveling from a departure point to a destination, comprising the steps of:

(a) transmitting a signal for demanding a detection of a navigation path, which is a short-cut path or an optimum path from the departure point to the destination, to a path detecting server via a wireless network;

(b) receiving path data which represent the navigation path from the path detecting server via the wireless network;

(c) displaying the navigation path in response to the received path data;

(d) precalculating deviation-expected path data which represent deviation-expected paths;

(e) selecting revised path data, which represent a revised navigation path, among the precalculated deviation-expected path data in case a present position of the mobile object deviates from the navigation path; and

(f) displaying the revised navigation path in response to the revised path data.

8. The method of claim 7, further comprising a step of detecting the present position of the mobile object.

9. The method of claim 8, wherein the navigation path and the revised navigation path are outputted either in the form of an audio signal or in the form of an image signal at steps (c) and (f).

10. The method of claim 9, wherein the revised path data are selected among the deviation-expected path data by inspecting which of the deviation-expected paths includes the present position at step (e).

11. The method of claim 7, further comprising the steps of storing the path data or the deviation-expected path data in a memory after the path data or the deviation-expected path data are received and retrieving the stored path data or the stored deviation-expected path data from the memory while displaying the navigation path or the revised navigation path.

12. The method of claim 7, wherein the deviation-expected paths are precalculated from a plurality of deviation points to the destination at the step (d), the deviation points being arbitrary places where the mobile object begins to deviate from the navigation path.