KR100940808B1 - System and Method for Route Guide Using Information Traffic in Shadow Area Reception GPS - Google Patents

Abstract

The present invention comprises a first step of changing to the virtual driving mode when the vehicle enters the GPS shadow area and the GPS reception failure state; A second step of determining the presence or absence of the received traffic information before changing to the virtual driving mode; A third step of executing a virtual driving mode if the traffic information exists; And a method for guiding a route using traffic information and a system therefor, the fourth step of releasing the virtual driving mode when the location recognition information is determined to be valid information by re-receiving the GPS. When the GPS reception reaches the shaded area that is poor, the vehicle switches to the virtual driving mode by using the stored traffic information. Therefore, it is possible to use the route guidance search of the same effect as when receiving and driving the traffic information in real time.

GPS, shaded area, traffic information, virtual driving

Description

System and Method for Route Guide Using Information Traffic in Shadow Area Reception GPS}

The present invention relates to a navigation, and more particularly, to a route guidance method using a traffic information in the GPS receiving shadow area providing a route guidance in the virtual driving mode using the traffic information in the GPS receiving shadow area and a system therefor. .

In general, navigation refers to a device that receives a radio wave emitted by a GPS satellite from the ground and displays the current vehicle location and the shortest distance to a destination on a monitor mounted inside the vehicle. Currently, various navigation terminals are attracting consumers' choices with various functions. However, the most important feature of the navigation is to provide a smooth car life with accurate location recognition and excellent surrounding map data, providing easy driving directions and the necessary surrounding information. The GPS signal is a signal having straightness, and there are shadowed areas such as tunnels and underground roads that the GPS receiver cannot receive.

Even when a vehicle enters such a shaded area, a method of additionally installing a speed sensor or a gyro sensor in the navigation has been used in order to guide a proper route to the user. Since the speed sensor may detect the traveling speed of the vehicle, the navigation may determine the current position of the vehicle in consideration of the traveling speed and the passage of time.

However, additional installation of expensive equipment such as the speed sensor for route guidance in some shaded areas is costly for the user. In addition, the method using the speed sensor mounted on the vehicle itself has a problem in that users who do not want to modify the vehicle cannot use it.

Therefore, users using conventional navigation, which have a built-in speed sensor or the like and are not connected to the speed sensor, have to give up the route guidance in the shadow area.

That is, because the GPS signal had to be received in order to check the vehicle position, it was not able to proactively cope with the case where the reception was not received or an unexpected error occurred.

On the other hand, there is a service that provides location information without addition of hardware configuration in the GPS receiving shadow area. The navigation provides a service called predictive traffic information. Predictive traffic information is divided into 24 hour traffic information by 5 minutes and link unit, and in general, there is a DB that makes the traffic speed at that time so that the navigation software can utilize it.

However, this also does not store information such as holidays and weekday holidays separately, so the accuracy is low on these days. For example, let's say it's a weekday, but it's a New Year's Day. In this case, the traffic situation is very different from the normal weekdays. In other words, unopened days are closed during the weekdays, so the city direction is blocked when you go to work and the city direction when you leave work. However, in today's cases, many department stores and parks are blocked.

In addition, since there is only link speed information, the road control situation cannot be reflected. Congestion reflection is only statistical.

As a result, even if the existing additional hardware configuration or predictive traffic information service is used, the current location information is incorrectly displayed on the map in case of a reception error in the GPS shadow area, which may cause the user to be embarrassed while driving and threaten the driver's safety. .

The present invention is to solve the above problems, the purpose of providing a route guidance in the virtual driving mode using the TPEG, V2V information in the GPS shadow area.

The route guidance method using the traffic information in the GPS receiving shadow area according to the present invention, and the navigation therefor is to switch to the virtual driving mode using the stored traffic information when the GPS reception is poor while driving the vehicle traffic information in real time It is possible to use the route guidance search of the same effect as when receiving and driving.

According to an aspect of the present invention, a route guidance method using traffic information in a GPS receiving shadow area according to the present invention includes a first step of changing to a virtual driving mode when the vehicle enters a GPS shadow area and becomes a poor GPS reception state; A second step of determining the presence or absence of the received traffic information before changing to the virtual driving mode; A third step of executing a virtual driving mode if the traffic information exists; And a fourth step of releasing the virtual driving mode if the location recognition information is found to be valid information by re-receiving the GPS.

In addition, the route guidance system using the traffic information in the GPS receiving shadow area according to the present invention includes a receiver for receiving a GPS signal and traffic information; A memory for storing the traffic information; When the vehicle enters the GPS shadow area, the vehicle changes to the virtual driving mode, and executes the virtual driving mode based on the traffic information received through the receiver until the virtual driving mode stored in the memory is changed, and re-receives the GPS to recognize the location. A control unit releasing the virtual driving mode if the information is found to be valid information; And a display unit for displaying an application according to the traffic information under the control of the controller.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a route guidance system using traffic information in the GPS receiving shadow area according to the present invention.

Referring to FIG. 1, the receiver 100 receives a GPS signal and traffic information.

Preferably, the traffic information is received via TPEG or V2V.

More preferably, the TPEG (Transport Protocal Expert Group) performs a function of guiding the traffic traffic information through the DMB channel to avoid the traffic jam. In addition, the V2V (Vehicle-2-Vehicle) is a vehicle-to-vehicle communication protocol, and has high utility in vehicle safety and driving fields, such as obtaining intersection information from navigation information, recognizing stop line markings, warning sounds when speed exceeds, and determining the position of approaching vehicles. Therefore, it analyzes vehicle position and speed, trajectory and traffic volume of other vehicles.

The key fitting unit 110 includes a plurality of function keys as a user interface and outputs key signals for the keys to the controller 150.

The memory 120 stores traffic information and GPS signals received through the receiver 100.

Preferably, the vehicle stores location information of the vehicle from the traffic information and the GPS signal.

In addition, the TPEG receives information including a traffic congestion state of a road, destination and waypoint information, and notice information.

The road traffic message (RTM) is information for guiding a vehicle passing nearby by providing accident information that occurred suddenly on a road.

The sound output unit 130 includes a speaker provided in the navigation, and outputs the sound signal stored in the memory 120 in an audible state under the control of the controller 150.

The display unit 140 expresses an application according to the traffic information under the control of the controller 150.

When the vehicle enters the GPS shadow area, the controller 150 changes to the virtual driving mode, executes the virtual driving mode based on the traffic information stored in the memory, and re-receives the GPS so that the location recognition information is valid. If it turns out, the virtual driving mode is released.

The virtual driving is a simulation in which a driver provides an effect such as driving with GPS reception as if the driver is driving on a real road. In addition, the GPS shadowed area is an area that does not receive GPS signals, and refers to an area such as a tunnel or subway inside a large building or behind a mountain or a hill. A shaded area in a vehicle with navigation refers to tunnels, underpasses, mountains, or areas with weak GPS signals.

In addition, the controller 150 executes the virtual driving mode using the TPEG and V2V communication included in the traffic information.

In addition, the controller 150 determines that the GPS information is valid information when three or more GPS received coordinate values are received. In other words, twenty-four satellites fly around the Earth's 2,200 km altitude for tracking purposes. Not all 24 satellites are needed to calculate where a vehicle with navigation is located on the earth's surface, so three of these satellites require an accuracy of 30-100 meters of error. You can get the dimension coordinates.

However, only three satellites can be used to determine the exact location. With three satellites, very good and good data can be obtained.

Therefore, when three or more GPS received coordinate values are determined as valid information.

2 is a flowchart illustrating a route guidance method using traffic information in a GPS receiving shadow area according to the present invention.

Referring to FIG. 2, when the vehicle in which the navigation device is installed enters the GPS shadow area while driving (S200), the controller 150 changes to the virtual driving mode (S210). Before changing the mode, the controller 150 determines that the vehicle is in an unstable GPS reception, and finally concludes that it is a shaded area. At this time, since the traffic information was received through the receiver 100 before the virtual driving mode was changed, it is determined whether the traffic information exists or not (S220). Preferably, the traffic information is TPEG, V2V, received in real time, and stored in the memory 120 for a predetermined time or periodically. Thus, the current position and the traveling speed of the vehicle can be estimated. Meanwhile, the virtual driving mode is in a waiting state until the presence or absence of the traffic information is confirmed, and when it is determined that the traffic information exists, the virtual driving mode is executed (S230).

Traffic information used in the virtual driving mode operation is as follows.

First, using the average speed information of the road type from the time of running the virtual driving mode to the route searched destination to determine the current position,

Second, through the CAN communication using the TPEG, V2V included in the traffic information, the current location information is calculated by identifying variables for traffic information caused by a traffic jam and an accident that cannot be identified by the first method.

Therefore, the current location information is obtained by combining the above two methods.

Preferably, the traffic information includes a traffic congestion state of a road, destination and waypoint information, and notice information.

In addition, when driving in the virtual driving mode, the weight on the link on the stored route before the traffic information reception failure state. That is, when the navigation is executed, the virtual driving mode is executed based on the route searched from the starting point to the destination.

In addition, the weight of the same link as the road type stored before the virtual driving mode is increased. That is, since the road type varies in speed depending on the road type such as a general road, a highway, a slope, and a meandering road, the predicted driving speed can be calculated relatively accurately.

Therefore, the current position information is grasped using the average speed information of the road type from the point of execution of the virtual driving mode to the route searched destination.

As a result, the virtual driving mode is executed at the predicted driving speed based on the traffic information immediately before the virtual driving mode.

The traffic information is stored in real time to calculate the current location information and the traveling speed. At this time, a weight is given to the last traveling speed recorded in the time immediately before the virtual driving mode. For example, if the vehicle speed was 100 km 30 minutes before entering the shadow area, the vehicle speed was 80 km 20 minutes ago, and the vehicle speed was 70 km 10 minutes ago, when the virtual driving mode is executed, the last time in the vehicle speed is the last. Route guidance is given by weighting the 70 km recorded in Therefore, the user does not have to worry about anxiety because the existing vehicle speed does not change rapidly even in the shaded area.

In addition, the virtual driving mode is executed at the driving speed reflecting the section where the accident occurred based on the notice information (accident / control / construction / department store sale / event / meeting information) just before the virtual driving mode. Can be received.

At this time, notice information guide with the voice information.

On the other hand, the location information is re-received via GPS while the virtual driving mode is executed (S240), it is determined whether the location information is valid information (S250), and if determined to be valid information, the virtual driving mode is released (S260). .

However, if it is determined that the information is not valid, the location information is received through the GPS until the valid location information is received while continuing the virtual driving mode.

The method of validating the location recognition information determines that the GPS reception coordinates are valid information via three or more GPS coordinates. This is because the exact time and distance are measured from the GPS receiver and three or more satellites, and three different distances are accurately calculated according to the triangulation method. Therefore, the latitude, longitude, and altitude are calculated from the coordinate values to grasp the positional information of the vehicle.

The method may further include releasing the virtual driving mode and matching the map. This is a method for solving a problem in which the position of the vehicle on the road and the position of the vehicle on the map may be slightly different when the virtual driving mode is released and traffic information is received again. In fact, in the conventional navigation, the GPS is incapable of receiving GPS after entering the shaded area, and when the vehicle leaves the shaded area, the current position of the vehicle does not exactly match the map.

Therefore, the virtual driving mode is released and the map-matched route is guided.

3 is a diagram illustrating an exemplary embodiment of releasing a virtual driving mode and matching a map in a route guidance method using traffic information in a GPS receiving shadow area according to the present invention.

Referring to FIG. 3, when the vehicle enters the shadowed area to execute the virtual driving mode and receives valid information through GPS, the virtual driving mode is released. At this time, the arrow is the vehicle location information on the map, the left arrow is error information indicating that the vehicle is located in the building, not the road. As described above, when the traffic information is re-received out of the shaded area, the location information of the vehicle cannot be matched instantly. Therefore, in the present invention, the weight of the link on the route stored before the virtual driving mode is weighted and the position of the vehicle is weighted to the right side of the building, so that the vehicle position can be accurately displayed on the road as the arrow of the right side of the screen. do.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

1 is a block diagram showing a route guidance system using traffic information in the GPS receiving shadow area according to the present invention.

2 is a flowchart illustrating a route guidance method using traffic information in a GPS receiving shadow area according to the present invention.

3 is a diagram illustrating an exemplary embodiment of releasing a virtual driving mode and matching a map in a route guidance method using traffic information in a GPS receiving shadow area according to the present invention.

<Description of the symbols for the main parts of the drawings>

100 receiving unit 110 control unit

120: memory 130: sound output unit

140: display unit 150: control unit

Claims (14)

A first step of changing to a virtual driving mode when the vehicle enters the GPS shadow area and becomes a GPS reception failure state; A second step of determining the presence or absence of the received traffic information before changing to the virtual driving mode; A third step of executing a virtual driving mode if the traffic information exists; And And a fourth step of releasing the virtual driving mode if the location recognition information is found to be valid information by re-receiving the GPS. The method of claim 1, The traffic information is a route guidance method using the traffic information in the GPS receiving shadow region, characterized in that received via TPEG or V2V. The method of claim 1, The traffic information includes a traffic congestion state of a road, a destination and waypoint information, and notice information. The method of claim 1, The traffic guidance method using the traffic information in the GPS receiving shadow area, characterized in that the weighted to the link on the stored route before the traffic information reception failure state in the virtual driving mode. The method of claim 1, The route guidance method using the traffic information in the GPS receiving shadow area, characterized in that to increase the weight of the same link as the road type stored before the virtual driving mode change. The method of claim 1, The route guidance method using the traffic information in the GPS receiving shadow region, characterized in that the current location information is grasped using the average speed information of the road type to the route searched destination at the time of running the virtual driving mode. The method of claim 1, The route guidance method using the traffic information in the GPS receiving shadow region, characterized in that for running the virtual driving mode at the estimated driving speed based on the traffic information immediately before the virtual driving mode. The method of claim 7, wherein The route guidance method using the traffic information in the GPS receiving shadow region, characterized in that the weighted to the last recorded driving speed in time of the traffic information immediately before the virtual driving mode. The method according to any one of claims 1 to 3, The route guidance method using the traffic information in the GPS reception shaded region, characterized in that for running the virtual driving mode at a driving speed reflecting the section of the yugo generation based on the notice information just before the virtual driving mode. The method of claim 1, In step 4, the method of validating the location recognition information is a route guidance method using traffic information in a GPS receiving shadow area, characterized in that it is determined to be valid information via three or more GPS received coordinate values. The method of claim 1, The route guidance method using the traffic information in the GPS receiving shadow area, characterized in that further comprising the step of releasing the virtual driving mode and map matching. Receiving unit for receiving the GPS signal and traffic information; A memory for storing the traffic information; When the vehicle enters the GPS shadow area, the vehicle changes to the virtual driving mode, executes the virtual driving mode based on the traffic information received through the receiver until the virtual driving mode stored in the memory is changed, and receives the GPS to recognize the location. A control unit releasing the virtual driving mode if the information is found to be valid information; And Route guidance system using the traffic information in the GPS receiving shadow area including a display unit for displaying the application according to the traffic information under the control of the controller. The method of claim 12, The control unit is a route guidance system using the traffic information in the GPS receiving shadow region, characterized in that to run the virtual driving mode using the TPEG, V2V communication included in the traffic information. The method of claim 12, The control unit is a route guidance system using the traffic information in the GPS receiving shadow area, characterized in that it is determined that the valid information when the GPS coordinates of the three or more.

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