KR20090121067A - A method for deciding a pathway of a navigation system of a vehicle - Google Patents

Abstract

PURPOSE: A route setting method of a navigation system for a vehicle is provided to receive digital broadcasting well by setting a route to avoid a poor reception area. CONSTITUTION: A route setting method of a navigation system for a vehicle comprises following steps. Operation is started by a user(S100). Start point and destination information is received from a user(S110). Whether a broadcasting reception mode is set up or not is determined(S120). In case the navigation system is set up as a broadcasting reception mode, a weighted value is set up in a cost of a road passing through a poor reception area(S130). In case of setting up the broadcasting reception mode, an optimal path is set up in consideration of the reception status of electric wave(S140).

Description

A METHOD FOR DECIDING A PATHWAY OF A NAVIGATION SYSTEM OF A VEHICLE}

The present invention relates to a navigation system, and more particularly, to a navigation system capable of digital broadcast reception.

Recently, with the development of digital processing and wireless communication technology, various digital services have been provided for providing various conveniences to a driver or a passenger in a vehicle. In particular, the information service using a navigation system mounted in the vehicle or built-in vehicle can provide the necessary information required for the driver when driving the vehicle, the demand is increasing rapidly.

The navigation system basically stores map information and works with a satellite positioning system (GPS) for real-time driving information of the vehicle, such as driving direction of the vehicle and driving destination. It is an information terminal provided with a map of the distance to, the current speed of the vehicle, the optimal route to the destination, and the like. Recently, in addition to these basic functions, it also provides various entertainment functions such as a digital broadcast reception function, a multimedia playback function, and an audio playback function.

Typically, the best route to a destination provided by navigation is to provide the shortest route from the current vehicle location to the destination, or to meet the conditions required by the driver (e.g., toll roads, highway routes, etc.). Provide the path.

In this case, however, since the route provided from the navigation system is provided based on a simple distance on the road or a driver's requirement, the route can pass through a random reception area of radio waves.

When a driver receives a digital broadcast while traveling by navigating with a route guide, there is a problem that broadcast reception is frequently interrupted when passing a random reception area of radio waves.

The technical problem to be solved by the present invention is to provide a navigation system that does not interfere with the reception of the digital broadcast by setting the path to avoid the random reception area of the radio wave when receiving the digital broadcast while moving by receiving the route guidance to the navigation will be.

A route setting method of a vehicle navigation system according to an aspect of the present invention includes receiving starting and destination information from a user and setting an optimum route in consideration of a reception state of radio waves when the broadcast receiving mode is set. .

According to another aspect of the present invention, a vehicle navigation system includes a GPS receiver for receiving current position information of a vehicle from a GPS (Global Positioning System) satellite, a broadcast receiver for receiving broadcast data, and information on a random reception area of map data and radio waves. And a main processor configured to interlock with the GPS receiver, the broadcast receiver, and the memory, and to set an optimum path in consideration of a reception state of radio waves when the broadcast receiver is set to a broadcast reception mode.

As described above, when receiving the digital broadcast while moving by receiving the route guidance by navigation, the navigation system can be obtained by setting the path so as to avoid the random reception area of radio waves so that the reception of the digital broadcast is prevented.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. In the preferred embodiment of the present invention described below, specific technical terms are used for clarity of content. However, the invention is not limited to the particular term selected, and it is to be understood that each specific term includes all technical synonyms that operate in a similar manner to achieve a similar purpose.

1 is a block diagram showing the configuration of a navigation system according to a preferred embodiment of the present invention.

As shown in FIG. 1, the navigation system 100 according to the preferred embodiment of the present invention includes a GPS receiver 110, a broadcast receiver 120, a memory 130, a screen output unit 140, and a voice output unit. 150 and the main processing unit.

The GPS receiver 110 receives from the satellite the current position information of the vehicle, for example, coordinate information of a point at which the vehicle is currently traveling through the antenna. The GPS receiver 110 provides current position information of the vehicle to the main processor 160.

The broadcast receiver 120 receives a signal transmitted from a broadcast station through an antenna. The signal transmitted from the broadcasting station may be a video signal or an audio signal. The navigation system 100 may provide a TV viewing or radio reception function to the user through the broadcast receiving unit 120. In addition, the broadcast receiver 120 may receive real-time traffic information from the satellite. Here, the real-time traffic information may include the speed of the vehicle on the road, whether an accident occurs and whether the vehicle is congested. The broadcast receiving unit 120 receives and decodes a signal and real-time traffic information transmitted from the broadcasting station and provides the decoded signal to the main processor 160.

The memory unit 130 stores map data, information on a random reception area of radio waves, an optimum path of a vehicle set by the main processor 160, and the like. The memory unit 130 may provide the main processor 160 with map data on the road between the starting point and the destination and information on the random reception area of the radio wave. The map data and information on the random reception area of the radio wave may be periodically updated by the user in the form of software.

The screen output unit 140 outputs various image information on the screen. For example, the screen output unit outputs a video signal received by the broadcast receiving unit 120, map information from a starting point to a destination, a moving path searched by the main processor 160, and a current location of the vehicle on the screen. The information displayed on the screen can be arbitrarily selected by the user. That is, the user may select to output the image signal, the map information, and the movement path alone, or simultaneously output a plurality of information on one screen.

The voice output unit 150 outputs various voice signals. For example, the voice output unit 150 outputs a voice signal received by the broadcast receiving unit 120 and a path guide for the moving path searched by the main processor 160.

The main processor 160 exchanges information with the GPS receiver 110, the broadcast receiver 120, the memory 130, the screen output unit 140, and the voice output unit 150. Find the best route. Here, the main processor 160 may search for the optimum path in consideration of the reception state of the radio wave. The main processor 160 that has set the optimal path provides information about the optimal path to the screen output unit 140 and the audio output unit 150.

2 is a flowchart illustrating a path setting method of a navigation system according to an exemplary embodiment of the present invention.

The navigation system according to an embodiment of the present invention starts the operation by the user (S100). The navigation system receives starting and destination information from the user (S110).

The navigation system determines whether the broadcast reception mode is set (S120). Here, the broadcast reception mode refers to a state in which a broadcast channel such as a TV broadcast and a radio broadcast is turned on, and the broadcast reception mode may be set by a user.

When the navigation is set to the broadcast reception mode, a weight is set to the cost of the road passing through the random reception area of radio waves (S130). Here, the information about the random reception area of the radio wave may be included in the memory unit of the navigation system, and the road refers to a link between nodes such as a starting point, an intersection, or a destination. In addition, the cost may be determined by a distance of a road, a time taken to reflect real-time traffic information, or a combination thereof, and may have, for example, a numerical value, a value, or a level. In addition, the weight may be set in the form of adding or multiplying any number, value, or grade to the cost of the road. That is, the weight may be set in the form of adding a value, value or class greater than 0 or multiplying a value or value greater than 1 to the cost of the road passing through the random reception area of the radio wave. However, the method of setting the weight on the cost of the road presented here is only an example.

For example, a first route from origin A to destination B passes node a, a second route passes node b, the cost of the road from source A to node a, the cost of the road from node a to destination B, the origin Assume that the cost of the road between A and node b and the cost of the road between node b and destination B are all one. Here, when the road between the node b and the destination B passes through the random reception area of the radio wave, a weight is set to the cost of the road between the node b and the destination B, and the cost is set to 2.

In this way, by setting the cost of the road passing through the random reception area of the radio wave relatively higher than the cost of the road not passing the radio reception area of the radio wave, the navigation system avoids the road passing through the random reception area of the radio wave. Increase the likelihood of setting the travel path.

The navigation system sets an optimal route among various routes between the departure point and the destination (S140). Here, a path having the smallest sum of costs among various paths between the starting point and the destination may be set as an optimal path. A detailed method of setting the optimum route according to the sum of the cost of the road will be described later.

After setting the optimum route, the navigation system ends the route search and starts the route guidance (S150).

3 illustrates a method for setting an optimal route by a navigation system according to an embodiment of the present invention when there is no random reception area of radio waves between a starting point and a destination.

As shown in FIG. 3, there are nodes a, b, c, d, e between origin A and destination B, the cost of the road connecting Origin A and node b, the cost of the road connecting Origin A and node e, The cost of the road connecting node b and node c, the cost of the road connecting node e and node c, the cost of the road connecting node e and node d, the cost of the road connecting node c and node a, and the node c and node d The cost of the connecting road, the cost of the road connecting node a and destination B and the cost of the road connecting node d and destination B is 2, and the cost of the road connecting node b and node a is 3. In addition, the route from the source A to the destination B may be A-b-a-B, A-b-c-d-B, A-b-c-a-B, A-e-c-a-B, A-e-c-d-B, A-e-d-B and the like.

Here, the sum of the costs of the roads for each route between the starting point A and the destination B is calculated, and the route having the minimum value is set as the optimum route. That is, since the sum of the costs of the roads for the A-e-d-B path among the various paths is the smallest as 6, the A-e-d-B path is set as the optimal path.

4 illustrates a method of setting an optimal route by a navigation system according to an embodiment of the present invention when there is a random reception area of radio waves between a starting point and a destination.

As shown in FIG. 4, there are nodes a, b, c, d, e between origin A and destination B, the cost of the road connecting Origin A and node b, the cost of the road connecting Origin A and node e, The cost of the road connecting node b and node c, the cost of the road connecting node e and node c, the cost of the road connecting node e and node d, the cost of the road connecting node c and node a, and the node c and node d The cost of the connecting road, the cost of the road connecting node a and destination B and the cost of the road connecting node d and destination B is 2, and the cost of the road connecting node b and node a is 3. Here, the road connecting the node e and the node d passes through the random reception area of radio waves, and thus sets a weight of +3. In addition, the route from the source A to the destination B may be A-b-a-B, A-b-c-d-B, A-b-c-a-B, A-e-c-a-B, A-e-c-d-B, A-e-d-B and the like.

Here, the sum of the costs of the roads for each route between the starting point A and the destination B is calculated, and the route having the minimum value is set as the optimum route. That is, since the sum of the costs of the roads for the A-b-a-B path is the smallest among the various paths, the path A-b-a-B is set as the optimal path. This is different from setting the optimal path to A-e-d-B, where the sum of the cost of the roads is 6 if no weight is assigned to the cost of the road passing through the random reception area of radio waves. Therefore, the navigation system according to an embodiment of the present invention selects and guides a route so as to avoid a random reception area of radio waves, and the user can receive a broadcast without interruption of the broadcast while driving.

5 illustrates a method for setting an optimal route by the navigation system according to an embodiment of the present invention when there is a shaded area of radio waves near a destination.

As shown in FIG. 5, there are nodes a, b, c, d, e between origin A and destination B, the cost of the road connecting Origin A and node b, the cost of the road connecting Origin A and node e, The cost of the road connecting node b and node c, the cost of the road connecting node e and node c, the cost of the road connecting node e and node d, the cost of the road connecting node c and node a, and the node c and node d The cost of the connecting road, the cost of the road connecting node a and destination B and the cost of the road connecting node d and destination B is 2, and the cost of the road connecting node b and node a is 3. Here, the road connecting the node a and the destination B and the road connecting the node c and the destination B pass a random number reception area of radio waves and thus set a weight of +3. In addition, the route from the source A to the destination B may be A-b-a-B, A-b-c-d-B, A-b-c-a-B, A-e-c-a-B, A-e-c-d-B, A-e-d-B and the like. In Fig. 5, it must pass through the random reception area of radio waves from the source A to the destination B.

Here, the sum of the costs of the roads for each route between the starting point A and the destination B is calculated, and the route having the minimum value is set as the optimum route. That is, since the sum of the costs of the roads for the A-e-d-B path is the smallest among 9, the A-e-d-B path is set as the optimal path. If the random reception area of the radio wave is located near the destination and must pass through the random reception area of the radio wave, the path having the smallest cost sum of the road is set as the optimal path.

The invention can be implemented in hardware, software or a combination thereof. In hardware implementation, an application specific integrated circuit (ASIC), a digital signal processing (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, and a microprocessor are designed to perform the above functions. , Other electronic units, or a combination thereof. In the software implementation, the module may be implemented as a module that performs the above-described function. The software may be stored in a memory unit and executed by a processor. The memory unit or processor may employ various means well known to those skilled in the art.

As mentioned above, preferred embodiments of the present invention have been described in detail, but those skilled in the art to which the present invention pertains should understand the present invention without departing from the spirit and scope of the present invention as defined in the appended claims. It will be appreciated that various modifications or changes can be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

1 is a block diagram showing the configuration of a navigation system according to a preferred embodiment of the present invention.

2 is a flowchart illustrating a path setting method of a navigation system according to an exemplary embodiment of the present invention.

3 illustrates a method of setting an optimal route by a navigation system according to an embodiment of the present invention when there is no random reception area of radio waves between a starting point and a destination.

4 illustrates a method of setting an optimal route by a navigation system according to an embodiment of the present invention when there is a random reception area of radio waves between a starting point and a destination.

5 illustrates a method for setting an optimal route by the navigation system according to an embodiment of the present invention when there is a shaded area of radio waves near a destination.

Claims (5)

In the route setting method of a vehicle navigation system, Receiving origin and destination information from a user; And And setting an optimum path in consideration of a reception state of radio waves when the broadcast reception mode is set to the broadcast reception mode. The method of claim 1, Setting the optimal path, Weighting the cost of the road passing through the random receiving area of the radio wave; And And setting a path of which the sum of costs between the starting point and the destination is the minimum as an optimal path. The method of claim 2, The cost is determined by the distance of the road, the time required to reflect the real-time traffic information, or a combination thereof. A GPS receiver configured to receive current position information of the vehicle from a GPS (Global Positioning System) satellite; A broadcast receiver for receiving broadcast data; A memory unit including map data and information on a random reception area of radio waves; And And a main processor that is linked with the GPS receiver, the broadcast receiver, and the memory, and sets an optimum path in consideration of a reception state of radio waves when the broadcast receiver is set to a broadcast reception mode. The method of claim 4, wherein And the main processing unit weights the cost of the road passing through the random reception area of the radio wave using the map data obtained from the memory unit and information on the random reception area of the radio wave.

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