KR20040104210A - Method for dispalying position information including image in navigation system - Google Patents

Abstract

PURPOSE: A method for displaying location information in a navigation system is provided to catch the whole view by previously confirming real images for following peripheral installations using the present location information and proceeding direction of a mobile terminal. CONSTITUTION: If a mobile terminal selects a navigation mode and transmits associated information to an information center, the information center transmits map data to set up a route from the present location of the mobile terminal to the destination. If the mobile terminal selects a desired node at the map data, the information center transmits a node message at the selected node VR(Virtual Reality) location. At this moment, the node message transmitted at the node VR location consists of node data as the information of the node and node image information as picture information for the peripheral installations of the node.

Description

Location information display method of navigation system {METHOD FOR DISPALYING POSITION INFORMATION INCLUDING IMAGE IN NAVIGATION SYSTEM}

The present invention relates to a location display method of a navigation system, and more particularly, to a method for displaying node information including image information at each node location specified by a user.

In general, a communication terminal having a GPS (Global Position Information) device may check its own location information by a signal received from the GPS. In addition, a navigation system using the GPS has been developed and the use of such a navigation system is increasing. The navigation system as described above stores map information in a storage medium such as a CD, and when the navigation system is moved, identifies the position of the navigation system to which the GPS is moved and outputs it to the navigation system. The navigation system then displays its movement location on the map according to the received GPS information. In addition, the navigation system downloads map information and its location information from the GPS, and the navigation system displays its movement location on the map according to the received GPS information. The navigation system may be a navigator or a portable communication terminal of a vehicle.

However, such a navigation system first selects a desired destination, and the navigation system sets a movement path of the mobile terminal, and when the mobile terminal starts to move, the navigation system provides location information according to the movement of the mobile terminal. do. In this case, the navigation system can provide information to the node position on the movement path. In this case, the information provided indicates the current location on a map on a plane that looks like two or three dimensions.

However, the conventional navigation system as described above cannot selectively provide information on node positions desired by the user. In addition, the conventional navigation system displays the location on the flat map using the location information received from the GPS, it is difficult to accurately grasp the surrounding views of the area by this display method alone. Therefore, the need for a method of selecting a node position that the user wants to display in a navigation system and downloading image information on the feature and surrounding facilities of the node from the selected position is gradually increasing.

Accordingly, an object of the present invention is to provide a method of downloading and displaying image information of a feature corresponding to a location of a place to which a navigation system moves.

Another object of the present invention is to provide a method for setting nodes that a user wants to display when displaying a desired destination in a navigation system and displaying location information of the set nodes.

Another object of the present invention is to provide a method for setting nodes that a user wants to display when setting a desired destination in a navigation system, and displaying position information including image information of a feature of the set nodes.

Still another object of the present invention is to select nodes that a user wants to display in a navigation system, to download a panoramic image of a feature according to the selected node position, and to download image information according to a moving direction of the navigation system when downloading. It provides a method that can be displayed by.

Still another object of the present invention is to select the furnaces that the user wants to display to the destination in the navigation system, and to download and display in real time the map information and the panorama image information for the feature according to the position of the selected nodes, The present invention provides a method for sequentially downloading image information of different positions.

Therefore, the navigation system according to an embodiment of the present invention for achieving the above object is provided with image information on the feature of the node, the node image information is composed of the partial image information according to the progress direction, the node image information An information center and a mobile terminal having a database for storing node messages and a database for storing map data are included. The method for transmitting the node message by the information center in the navigation system includes: a current position of the mobile terminal; After setting a route according to destination information, generating map data including nodes and transmitting the generated map data to the mobile terminal, and checking nodes selected by the mobile terminal from the transmitted map data, and then selecting the first node message. And downloading the node to the mobile terminal node. Each time a point is reached, the process includes downloading a node message of the next selected node, and ending the download of the node message when the mobile terminal reaches the last node point.

In addition, the navigation system according to an embodiment of the present invention for achieving the above object is provided with the image information on the feature of the node, the node image information is composed of the partial image information according to the progress direction, the node image information An information center and a mobile terminal having a database for storing node messages and a database for storing map data are included. The method for displaying the node message by the mobile terminal in the navigation system includes: a current location of the mobile terminal; Transmitting navigation information including destination information to the information center, receiving map data including nodes generated in the information center, and nodes for receiving the node message from the received map data. And select information on the selected nodes. Transmitting to the information center, displaying a selected first node message downloaded from the information center, downloading and displaying a node message of the next selected node each time the node point is reached, and the last node. When the point is reached, the downloading of the node message is terminated, and when the destination reaches the destination, the arrival of the destination is characterized in that the process consists of ending.

In addition, the navigation system according to an embodiment of the present invention for achieving the above object is provided with the image information on the feature of the node, the node image information is composed of the partial image information according to the progress direction, the node image information An information center and a mobile terminal having a database for storing node messages and a database for storing map data are included. The method for displaying the node message by the mobile terminal in the navigation system includes: a current location of the mobile terminal; Transmitting navigation information including destination information to the information center, receiving map data including nodes generated in the information center, and nodes for receiving the node message from the received map data. A node for the selected nodes Requesting a batch transmission of messages, storing node messages of selected nodes downloaded from the information center, displaying the first node message being stored when moving, and selecting each time the node point is reached. And displaying a node message of a next node and displaying a message of a destination node of the node message when reaching the last node point, and displaying and ending a destination arrival when the destination is reached.

1 is a view showing a schematic configuration of a geographic information system (hereinafter referred to as a navigation system) according to an embodiment of the present invention.

2 is a view showing a schematic configuration of an information center 100 according to an embodiment of the present invention.

3 is a view illustrating a configuration of the mobile terminal 300 of FIG.

4A and 4B illustrate an example of map data including node locations;

5 illustrates a format of a node message according to an embodiment of the present invention.

FIG. 6 is a diagram showing a 360 degree direction at an arbitrary node, and is a diagram showing the type of travel direction of a mobile terminal.

7A to 7C are diagrams showing an example of node image information, and show a panoramic image example when the nodes are a straight road, a three-way street, and a cross-road, respectively.

8 is a diagram illustrating a partial image according to a moving direction in the panoramic image as shown in FIGS. 7A to 7C.

9A and 9C illustrate a method of displaying image data of map data and node messages in an embodiment of the present invention.

10 is a flowchart illustrating an operation procedure of processing information of each node in accordance with movement of a mobile terminal in an information center according to an embodiment of the present invention.

FIG. 11 is a flowchart illustrating a procedure of transmitting information of a node message by the information center in FIG. 10.

FIG. 12 is a flowchart illustrating another procedure of transmitting information of a node message by the information center in FIG. 10.

13 is a flowchart illustrating an operation procedure in which a mobile terminal processes information of each node according to the movement of the mobile terminal according to an embodiment of the present invention.

FIG. 14 is a flowchart illustrating a procedure of receiving image information of a node message transmitted from an information center by a mobile terminal in FIG.

FIG. 15 is a flowchart illustrating still another procedure of receiving image information of a node message transmitted from an information center by a mobile terminal in FIG.

16 is a flow chart of another method illustrating an operation procedure in which a mobile terminal processes information of each node in accordance with the movement of the mobile terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible.

The present invention uses a location information received from the GPS and the image of the node at the location stored in the database to show in real time in the form of Virtual Reality (VR). By using the VR to show the real image of all directions of the 360-degree node in the form of a panorama, it is possible to grasp the foreground of all directions at the location, so that the location information and the surrounding foreground can be grasped well. In addition, in the embodiment of the present invention, since it is cumbersome to download and play all the VR nodes in the process of going to the destination, it is also possible to download and display the image information of the specific node of interest before departure. It can prepare the node image to download and display the image information of the node before moving, and can reproduce the downloaded specific VR image to grasp the surrounding views of the area in advance. When the mobile terminal 300 moves and is adjacent to the selected VR node, the VR image is automatically played.

In the following description, the term "node" refers to a position where location information is displayed on a mobile terminal on a path through which the mobile terminal moves. The term " panorama image " refers to image information of a node. The term " panorama image " is a photographic image of photographing features (peripheral facilities) in a 360 degree direction from the node, and becomes image information of the node. In the embodiment of the present invention, it is assumed that the panoramic image is described. However, the same effect as that of the panoramic image can be obtained even if image information of a direction that can be moved in the corresponding node is stored for each direction. The term " mobile terminal " is used to mean a device capable of displaying a path according to movement, where " mobile terminal " refers to all devices capable of reading the position according to their movement from GPS or base stations. it means.

The navigation system according to an embodiment of the present invention is to serve geographic information using VR and location information. To do this, first input the destination and the route setting method, and calculate the current position by receiving the location information from the GPS satellite or the base station. It calculates the route between the starting point and the destination and displays all nodes capable of VR video service on the map. Downloading and displaying node messages of all nodes capable of VR video service in real time while moving is computationally expensive and users are troubled because they receive VR video services from nodes they already know. Therefore, in the process of setting the route before departure, select only the nodes of interest. In addition, playback can be selected by selecting one of the following two cases.

The first method is to download and play only the selected VR node data in real time while moving. This takes into account only the pre-selected VR nodes. When entering the node of the VR image played like a real-time VR service, it downloads a panorama image of the newest node in the direction of progress and plays the VR image, and displays the position of the upcoming node And update the current position. Until the destination is reached, information such as the current position, the playback of the VR image of the upcoming node, the display of the node of the VR image to be played, and the display of the node capable of VR service are updated on the screen.

The second method downloads, saves and moves the messages of the selected VR nodes in advance. And you can play a specific node before you leave, so you can get a sense of the surrounding landscape in advance. Afterwards, when it is adjacent to the selected VR service node, it automatically plays and shows the VR image. Such a display method is possible when the mobile terminal has enough memory to store the node message.

An embodiment of the present invention described below will be described based on the first display method, that is, a method of downloading a node message of a selected node while the mobile terminal moves. The second node message display method will be described with reference to FIG. 13.

In an embodiment of the present invention, when setting a movement path between an information center and a mobile terminal, nodes selected for display by the mobile terminal are selected, and the information center selects the location information of the next node selected whenever the mobile terminal arrives at the selected node. Download it for display. At this time, the node message downloaded from the selected nodes includes node data indicating information of the corresponding node and node image information which is a photographic image of the feature of the node. That is, the mobile terminal receives the current position information from the Global Positioning System (GPS) and receives and displays the data of the position information and the image information of the feature at the selected node position. Therefore, the navigation system can visually check the feature of the next location appearing in the direction of movement. An embodiment of the present invention provides a navigation system capable of downloading and displaying image information in a direction in which the navigation system moves as described above. In the embodiment of the present invention, it will be described assuming that the downloaded information is panoramic image information. However, general image information having direction information is also included.

The navigation system according to an embodiment of the present invention receives location information from the mobile terminal GPS, downloads panoramic image information of a feature corresponding to the location information from a data server (or GPS), and the mobile terminal proceeds. Displays a panoramic image of the 360-degree direction of the node position selected in the direction in real time. In addition, the embodiment of the present invention includes a method of selectively downloading and reproducing panorama image information according to a progress direction because a large amount of data to be processed occurs when the panorama image is reproduced using the 360-degree omnidirectional image. . And an efficient download and playback method using priorities of all or a part of the panoramic image as well as the current position and direction on the map currently displayed by the GPS in the mobile terminal.

In the navigation system according to the embodiment of the present invention, when the mobile terminal receives the location information of the mobile terminal from the GPS, and informs the information center of the information on the movement of the location of the mobile terminal, the information center is moved to the position movement of the mobile terminal. For example, it will be described by transmitting the image information of the feature according to the mobile terminal. That is, the navigation system according to an embodiment of the present invention is described as the mobile terminal receives the location information from the GPS, and downloads and displays the map data and the image information according to the location movement in real time from the information center. Can be stored internally or downloaded from GPS, and image information can also be downloaded from other places, such as GPS.

1 is a view showing a schematic configuration of a navigation system according to an embodiment of the present invention. This navigation system is characterized in that the navigation function is provided through the mobile terminal 300 as shown.

Referring to FIG. 1, the navigation system includes an information center 100, a wireless network 200, and a mobile terminal 300.

The information center 100 stores a node message including map data, node data indicating location information of each node according to an embodiment of the present invention, and node image information which is a picture image of a feature of the node. When the navigation function is requested from the mobile terminal 300, the navigation information is generated by referring to the map data and the image information and then provided to the mobile terminal 300 through the wireless network 200. For example, when an optimal route guidance from the current location of the vehicle to the destination is requested from the mobile terminal 300, the information center 100 transmits map data including nodes capable of transmitting the node message, and the mobile terminal 300. When the nodes to be displayed are selected in the information center 100, the information center 100 then transmits node data of the selected node position and node image information of the feature in real time according to the position movement of the mobile terminal.

The wireless network 200 is a path for information transmission between the information center 100 and the mobile terminal 300. The wireless network 200 may be a PCS (personal communication system) communication system that is currently widely used, or a digital cellular (ISD) 95A, 95B, 95C digital cellular (digital cellular) system. Also, the wireless network 200 includes a code division multiple access (CDMA) digital cellular system such as International Mobile Telecommunications 2000 (IMT-2000) or Universal Mobile Telecommunication Systems (UMTS), which has been widely studied recently. Can be used.

The mobile terminal 300 may be any mobile terminal device capable of detecting its location through a GPS receiver or a base station. In the embodiment of the present invention will be described assuming that the mobile terminal is a mobile phone. Accordingly, the mobile terminal 300 not only operates as a mode for providing a voice call service to a user, but also operates as a navigation mode for supporting a navigation function according to an embodiment of the present invention. In the navigation mode, the mobile terminal 300 is connected to the wireless network 200 to receive various navigation information provided from the information center 100 and provides the received navigation information to the user.

In the navigation mode, the user may set a current location and a destination on the mobile terminal 300 to request an optimal route guidance to the information center 100, and according to the setting, the user may optimize the current location and the destination, which are typical navigation functions, from the information center 100. You will be informed of the route. At this time, the node data capable of displaying a node message is displayed on the map data downloaded from the information center 100. When the user of the mobile terminal 300 selects nodes to be displayed, the information center 100 is the next node in the selected nodes. Download node messages. At this time, when setting the destination and the node, the user may set the facility name, local category, administrative name, telephone number, longitude and latitude as voice or text input. In addition, in the navigation mode, the user accesses the information center 100 through the mobile terminal 300 from the information center 100 and receives image information of surrounding facilities.

For example, when a user sets a current location of a mobile terminal and a destination to which to move in a navigation mode of the mobile terminal 300 and requests an optimal travel route, information according to the setting is transmitted to the information center through the wireless network 200. It is provided at 100. In response to the request, the information center 100 calculates an optimal driving route between the current location and the destination by referring to the map data stored therein, and image information of a feature such as surrounding facilities on the calculated optimal driving route. Provides map data including nodes for providing the data to the mobile terminal 300 through the wireless network 200. When the map data according to the movement route is received, the mobile terminal 300 selects nodes according to the optimal route and transmits them to the information center 100. Then, when the movement starts, the information center 100 provides the node data and the node image information of each node visually and / or audibly at the node position selected by the mobile terminal 300. At this time, the visually provided node information is displayed on the display unit of the mobile terminal 300, and the path guidance information provided acoustically is transmitted to the outside through the speaker of the mobile terminal 300. In the moving route guidance service, guidance guidance, voice guidance, guidance point and distance information remaining to the destination are provided.

Although the navigation system of FIG. 1 illustrates an example in which the information center 100 and the mobile terminal 300 transmit navigation information through the wireless network 200, the information center 100 and the mobile terminal 300 each have GPS communicators. When the navigation information is communicated through the GPS, the navigation system may be implemented without using the wireless network 200.

2 is a view showing a schematic configuration of an information center 100 according to an embodiment of the present invention.

Referring to FIG. 2, the information center 100 includes a computer 110, an image server 120, a route calculation server 130, a network server 140, a map data storage 112, and a storage 122 of the image information. The computer 110 generates map data according to previously investigated roads and traffic regulation situations (eg, national roads, traffic regulation contents, etc.). The map data indicates the positions of nodes capable of downloading node messages. The map data produced by the computer 110 is stored in a map data storage unit (or map database (DB)) 112. The image server 120 photographs a feature of each major point on the map as a picture, generates the image information, and stores the image information corresponding to the moving position of the mobile terminal 300 in the real-time image information storage unit 122. Here, the real-time image information refers to the image information of the feature for the important node in the direction that the mobile terminal 300 proceeds. The route calculation server 130 may refer to map data and image information stored in the map data storage 112 and the image information storage 122, respectively, when requesting data from the network server 140. The route is calculated, and the mobile terminal is guided (guided) to the optimal route according to the calculation result, and image information about the facilities at the main node during the movement is generated. The network server 140 is for connection with the wireless network 200.

As described above, the information center 100 stores map data and image information, and the map data for guiding an optimal route from the current position to the destination to which the mobile terminal 300 is to be moved and the picture image of the main node to pass during the movement. Information is transmitted to the wireless network 200 in real time. The node points may be intersections of roads (three-way, crossroad, rotary, etc.), public offices, public facilities, scenic spots, major buildings, toll gates, interchanges, and points near destinations.

The wireless network 200 provides the transmitted information to the information center 100 when the mobile terminal 300 accesses and transmits current location information and destination location information of the vehicle. In addition, the wireless network 200 provides the mobile terminal 300 with a download request for information on the optimal path derivation provided from the information center 100. The wireless network 200 is for wirelessly connecting the mobile terminal 300 and providing a wireless access service. The wireless network 200 may be implemented as a conventional CDMA digital cellular system or a PCS system. Also, the wireless network 200 may use an IMT-2000 system, which has been recently researched and developed.

3 is a diagram illustrating a configuration of the mobile terminal 300 of FIG. 1. The mobile terminal having the configuration as shown in FIG. 3 may be mounted in a vehicle or moved while being carried by a user. In addition, although the mobile terminal having the configuration of FIG. 3 is illustrated by taking a mobile phone as an example, it may be a navigation device mounted in a vehicle.

Referring to FIG. 3, the GPS receiver 312 receives radio waves from a plurality of satellites belonging to GPS through an antenna. The gyro sensor 314 and the velocity sensor 316 constitute a sensor unit. When the mobile terminal 300 is mounted on the vehicle, the rotation and movement speed of the wheels of the vehicle are sensed by the gyro sensor 314 and the speed sensor 316, respectively. If the mobile terminal 300 is not mounted on the vehicle, the outputs of the gyro sensor 314 and the speed sensor may not be used. The map data storage unit 318 stores map data and other additional information data. The map data may be output from the information center 100 and may be map data stored in a storage medium such as a CD-ROM. In the former case, when the navigation mode is selected, the mobile terminal 300 requests the information center to download the map data to a desired destination, and stores the downloaded map data in the map data storage unit 318. In the latter case, the map data storage unit 318 is generally implemented as a CD-ROM (Compact Disk-Read Only Memory).

The controller 310 controls overall operations of the mobile communication function and the navigation function.

When the user requests a navigation function, information about the current location and the destination location is transmitted, and the nodes to be displayed are selected from the node locations displayed in the received map data. Thereafter, the mobile terminal 300 transmits the changed location information each time the mobile terminal 300 moves, and controls to display the node message received at the node location. At this time, the position display method of the mobile terminal 300 may be performed as follows.

First, when the user carries the mobile terminal 300, the control unit 310 calculates the current pseudo position of the mobile terminal based on the moving speed of the current mobile terminal 300 detected from the sensor unit, and is also transmitted from the GPS receiver 312 One of the pseudo coordinate value of the current position and the calculated pseudo position value is selected. At this time, the selection criteria follow the calculated value when the cumulative error is small from the sensor unit, and when the cumulative error is increased, the cumulative error is corrected by the value transmitted from the GPS receiver 312. In addition, the controller 310 calculates not only the current position of the mobile terminal but also information such as a moving speed and a moving direction. The controller 310 reads the map data of the surrounding area based on the calculated movement information from the map data storage unit 318 and visually displays it on the display unit 326, and outputs the sound through the speaker 30.

Secondly, when the mobile terminal is mounted in the vehicle, the controller 310 calculates the current pseudo position of the vehicle based on the rotation angle and the speed of the vehicle transmitted from the sensor unit, and also the current position transmitted from the GPS receiver 312. Select one of the pseudo coordinate value and the calculated pseudo position value. At this time, the selection criteria follow the calculated value when the cumulative error is small from the sensor unit, and when the cumulative error is increased, the cumulative error is corrected by the value transmitted from the GPS receiver 312. In addition, the controller 310 calculates driving information such as the speed of the vehicle and the traveling direction of the vehicle, as well as the current position of the vehicle. The controller 310 reads the map data of the surrounding area from the map data storage unit 318 based on the calculated driving information, visually displays the display data on the display unit 326, and outputs the sound through the speaker 30.

After calculating the movement information of the mobile terminal 300 as described above, the controller 310 transmits the position information according to the movement of the mobile terminal 30 to the information center 100 through the wireless network 200. Then, the information center 100 calculates the movement path of the mobile terminal 300 and accesses the image information of the feature of the main node located on the movement path and transmits it through the wireless network 200. Then, the controller 310 of the mobile terminal 300 displays the received image information.

In addition to these basic functions, the controller 310 also provides a function of guiding an optimal path from a current location to a destination. The read only memory (ROM) 20 and the random access memory (RAM) 322 temporarily store a program for operating the controller 310 and data processed during the operation.

The graphic processor 324 processes the display data to be visually confirmed by the user according to the movement information calculated by the controller 310. The display unit 326 displays display data processed by the graphic processor 324. The display unit 326 may be implemented as a cathode ray tube (CRT) or a liquid crystal display (LCD).

The voice processor 328 processes the driving information calculated by the controller 310 as voice data so that the driver can be auditedly. The speaker 330 outputs voice data processed by the voice processor 28. The graphic processor 324 and the voice processor 328 process the map data read from the map data storage unit 18 and a state occurring while performing various functions as display data and voice data.

In the navigation system having the above configuration, an operation of downloading and displaying image information between the information center 100 and the mobile terminal 300 is as follows.

First, look at the initial operation, select the navigation service function on the mobile terminal 300 → connect to the information center 100 → transmit the current location / destination data of the mobile terminal to the information center 100 → receive and confirm the service data of the mobile terminal 300 from the information center 100 → Checking the optimal moving route in the information center 100 and transmitting map data showing the node location → Selecting the nodes to be displayed in the mobile terminal 300 → Transmitting node data and node image information of the next node that the mobile terminal 300 will pass through in the information center 100 In order.

Secondly, in operation, the node message provided by the information center 100 at each node location selected by the mobile terminal 300 is stored in the memory of the mobile terminal 300. The mobile terminal 300 is a node data and node image information of the received node message. Display partial image information in the direction of movement → Mobile terminal 300 displays image information of the next node while generating current location data by GPS engine, gyro sensor, and speed sensor → Mobile terminal 300 displays current location data in real time. In order to send. This operation ends when the current location of the mobile terminal 300 is the same as the final destination.

On the other hand, if the mobile terminal 300 leaves the path during the movement, it reconnects to the information center 100 again to provide the current location data of the mobile terminal 300, and receives and displays the image information of each node as described above while moving from the current location to the destination. .

Third, referring to the operation of the information center 100, when data from the mobile terminal 300 receives the navigation request information, the information center 100 checks whether the user of the mobile terminal 300 subscribes to the user. Recognize the current location and destination of the vehicle from the data → Search the optimal route to the recognized current location and destination by referring to the map database and the image database → Create a node message of the node location selected by the mobile terminal 300 to the navigation terminal. This is done in the order of transmission.

4A and 4B are diagrams showing an example of map data according to an embodiment of the present invention. 4A illustrates an example of map data on which detailed nodes are displayed, and FIG. 4B illustrates an example of map data set by selecting nodes that a user of the mobile terminal 300 wants to display in the map data as shown in FIG. 4A. Doing.

4A and 4B, when the mobile terminal 300 selects a navigation mode and transmits the information to the information center 100, the information center 100 sets a path from the current location of the mobile terminal 300 to a destination. It can transmit the map data as shown in Figure 4a. At this time, the map data as shown in Figure 4a is the map data indicating the node display and the path that can transmit a node message. The user selects nodes to be displayed on the map data as shown in FIG. 4A, and FIG. 4B is map data in which the user selects a node to be displayed. In FIG. 4A and FIG. 4B, a virtual reality (VR) indicates a node position capable of displaying a node message.

FIG. 5 is a diagram illustrating the structure of a node message transmitted from each node VR location where the mobile terminal 300 is selected as shown in FIG. 4B according to an embodiment of the present invention.

Referring to FIG. 5, a node message transmitted from each node position is composed of node data indicating node information and node image information which is photo image information of a feature (peripheral facility) of the node. The node data format of the node message includes header information and node point information. The node point information includes an intersection name, a road type, a link type, an angle with an adjacent road at an intersection, X and Y coordinates in a leaf, and image information of a corresponding node. The intersection name is text data and may be, for example, "Samsung crossroads." The road type is for classifying a road class, and may be a highway, a national road, a local road, or the like. The link type is used to distinguish the type of link, and may be a U-turn, a rotary, an overpass, an underpass, a bridge, and the like. The angle with the road adjacent to the intersection may be an intersection entry angle (in), an intersection exit angle (out), a north road based approach road left (left), a north road based advance road right (right).

The node image information may be a photographic image of a feature (peripheral facility) located around the node. The node image information may be 360 degree image information of four directions of east, west, north and south at the node. In the embodiment of the present invention, the above image information is referred to as a panorama image as described above. The panoramic image captures facilities in each direction in a 360-degree direction at an arbitrary node position, and stores the photographic images as image information of the corresponding node.

6 shows the 360 degree direction at any node. 6 illustrates the type of travel direction of the mobile terminal 300. 7A to 7C illustrate examples of image information corresponding to the type of moving direction as shown in FIG. 6. FIG. 7A illustrates an example of a panoramic image when the node is a straight road, FIG. 7B illustrates an example of a panorama image when the node is three-way, and FIG. 7C illustrates an example of a panorama image when the node is a crossroad. Doing. 8 illustrates a partial image region according to the moving direction of the mobile terminal 300 in the panoramic image as shown in FIGS. 7A to 7C. The partial image area of FIG. 8 has a structure corresponding to the type of travel direction of FIG. 6, respectively.

4A to 8, when the mobile terminal 300 requests a navigation by setting a navigation mode, the information center 100 is the same as FIG. 4A for setting a path to a destination requested by the mobile terminal 300. Send map data. At this time, the map data as shown in FIG. 4A includes node information for transmitting a node message from the current location of the mobile terminal 300 to the destination. When the user of the mobile terminal 300 selects a node to be displayed from the map data as shown in FIG. 4A, the map data as shown in FIG. 4B is generated. The information on the nodes selected by the user of the mobile terminal 300 is transmitted to the information center 100. Therefore, the path to which the mobile terminal 300 intends to move is set by nodes selected by the user of the mobile terminal 300.

Thereafter, a route service according to the movement of the mobile terminal 300 is performed. That is, the mobile terminal 300 transmits the current location information received from the GPS to the information center 100, and the information center 100 checks whether the current location of the mobile terminal 300 is the selected node location. And if the selected node location, the information center 100 analyzes the position information of the previous mobile terminal 300 and the currently received position information to determine the traveling direction of the mobile terminal 100, the node of the direction that the mobile terminal 100 proceeds Transmit panoramic video information. In this case, the transmitted panoramic image may be a panoramic image of the next node that the mobile terminal 300 will pass through. 6 illustrates a traveling direction of the mobile terminal 300. Although the moving direction of the mobile terminal 300 can be further divided into equal parts, it is assumed in the embodiment of the present invention that the clock direction is used by dividing 360 degrees into 12 as shown in FIG. 6. In FIG. 6, when the current progress direction is 6 o'clock (south south), the foreground of the previous direction may be grasped in advance by using the panorama image of the next crossroad. In FIG. 8, the left end 0 and the right end 12 are images used in the form of circular bands connected to each other.

It is also possible to reproduce all real images in all directions in the panoramic image, but this means an increase in the amount of data and processing time for transmitting the panoramic image. Therefore, there are many limitations in the use of a fast moving vehicle and a communication network with a limited transmission bandwidth. Therefore, the following cases can be considered with respect to the current position and direction of travel.

First, a case of transmitting an omnidirectional panoramic image will be described.

The omnidirectional panoramic image transmission may include a sequential transmission and reproduction method and a method of reproducing the partial image according to a progress direction. First, in the former case, if the information according to the progress direction is not important or the transmission and reproduction processing speed is very fast, it is not a problem to receive and reproduce the entire panoramic image as shown in FIGS. 7A to 7C. In the latter case, it can be considered that the part is important to be seen first according to the progress direction. In FIG. 6, when the mobile terminal 300 proceeds to 6 o'clock, partial images of the panoramic image as shown in FIGS. 7A to 7C are 6, 5, 7, 4, 8 and 3 of FIG. 8. The priority of all images may be determined in the order of hour, 9, 2, 10, and the like. Therefore, the panoramic image transmission as shown in FIGS. 7A to 7C may be sequentially zigzag transmitted according to the priority as described above.

Second, the case of transmitting a partial image of the panoramic image according to the progress direction.

The partial image transmission of the panoramic image may also include a sequential transmission and reproducing method and a reproducing method based on priority according to a progress direction.

First, the former transmission method means processing sequentially when receiving and playing back images within a limited angle depending on the progress direction due to the limitation of data transmission bandwidth and processing speed. In addition, the latter transmission method means a case of receiving and reproducing images in a limited angle according to a moving direction due to very limited data transmission bandwidth and processing speed. For example, when the display proceeds to 6 o'clock in FIG. 5, only five images of 6, 5, 7, 4, and 6 o'clock of the panoramic image can be received and reproduced based on the priority of the moving direction. .

In addition, the mobile terminal 300 may be reproduced while rotating the downloaded panoramic image automatically. And it includes all the functions to stop playback at a specific part and zoom in and out through zoom-in zoom-out according to the user's needs.

In addition, the method of displaying the image information of the downloaded node with the map data can be implemented in various ways. That is, when the display unit 326 of the mobile terminal 300 is large enough, it does not cause a problem in displaying the map data and the image information. However, when the mobile terminal 300 has a small size of the display unit 326 such as a mobile phone, it is difficult to display. Therefore, in the embodiment of the present invention, the map data and the photographic image may be displayed in three ways as follows.

The first display method is a method of simultaneously displaying a map and a real image on the display unit 326 of the mobile terminal 300. That is, when the display unit 326 of the mobile terminal 300 is large or small but wants to view the whole at the same time, the map and the real image can be simultaneously viewed as shown in FIG. 9A.

The second display method is a method in which a map and a real image are overlapped and displayed as shown in FIG. 9B. That is, it means that the screen of the display unit 326 of the mobile terminal 300 is small but it is desired to simultaneously view the map and the real image. In addition, the method may include controlling the weight of the transparency in the blending process of the two images.

The third display method is a method of sequentially displaying a map and a real image as shown in FIG. 9C. That is, it means that the map and the real image are alternately displayed on the screen of the display unit 326 of the mobile terminal 300. At this time, it includes both the ratio and the repetition period of the reproduction time of the map and the real image.

10 is a flowchart illustrating the operation of the information center 100 according to the embodiment of the present invention. 10 is a flowchart illustrating a procedure of downloading and playing a node message of a selected VR node in real time while moving as described above. 10 will be described based on the operating procedure of the information center 100.

Referring to FIG. 10, when the navigation mode is selected by the user, the mobile terminal 300 transmits information of the current location and a desired destination input by the user to the information center 100. In this case, the destination information may be set as a street address, place name, building name, and the like. The information center 100 receives the current location and destination information of the mobile terminal 300 for navigation in step 411. Then, the information center 100 receives the information about the current location / destination transmitted from the mobile terminal 300, and in step 415, detects the current location and calculates a path in response to the information. The current location detection operation is performed by receiving the current location (longitude and latitude) and destination information of the vehicle, and finding a matching place name / facility information item in the map data storage 112 to convert the latitude and longitude coordinates. The route calculation operation uses the map data storage 112 and the image information storage 122 to set an optimal route from the current location and destination information of the mobile terminal 300.

Thereafter, the information center 100 outputs information for setting a path selection method to the mobile terminal 300 and waits. In this case, the mobile terminal 300 sets options for setting condensation such as a shortest time, a shortest path, and a road (highway, general road) to be used. When the mobile terminal 300 inputs the path selection information as described above, the information center 100 performs a path calculation using the input information in step 415, and the path and VR service node according to the calculated path in step 417. The map data including the display information is transmitted. At this time, the transmitted map data displays the path to the desired destination of the mobile terminal 300 and all nodes capable of VR service on the path as shown in FIG. 4A on the map.

Then, the user of the mobile terminal 300 selects nodes to display a node message from the received map data as shown in FIG. 4A. In this case, the method for selecting the mobile terminal 300 node may use a method of inputting the number of nodes displayed on the map or inputting the names of the nodes. When the user of the mobile terminal 300 selects the desired nodes, that is, when the user of the mobile terminal 300 selects a node of interest among the nodes serving as the VR service displayed on the path of the map data as shown in FIG. In step 419, it is received to generate map data as shown in FIG. 4B. At this time, the map data as shown in FIG. 4B is shared by both the information center 100 and the mobile terminal 300. When nodes for displaying a node message are selected as described above, the movement path of the mobile terminal 300 is set.

When the movement path of the mobile terminal 300 is set as described above, the information center 100 downloads the node message of the first node to which the mobile terminal 300 passes in step 421, and the mobile terminal 300 transmits the information center 300. Receives and displays a node message transmitted from. At this time, the node message transmitted from the information center 100 is composed of node data and node image information as shown in FIG. 5, and the node message can be downloaded by the procedure shown in FIGS. 11 and 12.

Referring to FIG. 11, in step 511, the information center 100 generates a node message of a first node to which the mobile terminal 300 passes. In this case, the node message is information indicating information of a next node to be performed by the mobile terminal 300, and includes node data and node image information. Here, the node data includes header information of the node, and the name of the intersection of the node, the road type, the link type, and the angle with the adjacent road are the intersection entry angle (in), the intersection entrance angle (out), and the north-north standard entry. The left side of the road may be left (right), the north road based on the right road (right). In addition, the node image information may be a photographic image of facilities and features of the surroundings of the node, and the image information may be panoramic image information as shown in FIGS. 7A to 7C. Here, the panoramic image is image information obtained by photographing the surrounding facilities and the feature of the node while rotating 360 degrees in each corresponding node. In addition, it is assumed that the panoramic image information is divided into 12 partial images according to a direction as shown in FIG. 8. In this case, since the information center 100 must transmit a large amount of data when transmitting the panoramic image corresponding to the node position, first transmit partial images corresponding to the moving direction of the mobile terminal first, and then transmit partial images in adjacent directions. do.

Therefore, the information center 100 first transmits the node data of the node message in step 513, and analyzes the moving direction of the mobile terminal 300 in step 515. At this time, the determination of the moving direction analyzes the current position of the mobile terminal 300 and the position of the destination to analyze the direction in which the mobile terminal 300 moves. Thereafter, the information center 100 accesses the partial image information corresponding to the analyzed direction of the mobile terminal 300 and transmits the partial image information in step 517. For example, assuming that the traveling direction of the mobile terminal 300 is 6 o'clock, the partial image at 6 o'clock is transmitted. In step 519, it is checked whether the transmission of the accessed partial image is completed. Otherwise, the process returns to step 517 to continue transmission of the accessed partial image information. In this case, when the transmission of the partial image information is completed, the information center 100 detects this in step 519 and prepares the partial image information in the next direction in step 519, and proceeds to step 425 to transmit the prepared next partial image information. Therefore, when transmitting the panoramic image as shown in FIGS. 7A to 7C, if the moving direction of the mobile terminal 300 is 6 o'clock, the information center 100 repeats steps 517 to 523 and repeats 6 → 5 → 7 → 4. → 8 → 3 → 9 → 2 → 10 → 1 → 11 → 12 o'clock or 6 → 7 → 5 → 8 → 4 → 9 → 3 → 10 → 2 → 11 → 1 → 12 o'clock do.

When the partial image information is transmitted by the above procedure, all of the panorama image information having the structure shown in FIGS. 7A to 7C are transmitted. In this case, when the transmission of the panorama image information of the node as shown in FIGS. 7A to 7C is completed, the information center 100 detects this in step 523 and proceeds to step 423 of FIG. 10.

Then, the mobile terminal 300 receives and stores the downloaded node message in the same manner as in FIG. 10, and the mobile terminal 300 first reproduces the node data of the node message and the partial image information of the moving direction. In this case, the displayed partial image information becomes image information of a node to which the mobile terminal 300 passes next. In this case, the form displayed on the mobile terminal 300 may be one of the forms shown in FIGS. 9A to 9C. In addition, since the image information downloaded to the mobile terminal 300 is panoramic image information as shown in FIGS. 7A to 7C, the user of the mobile terminal 300 may display partial image information in a direction other than the direction in which the mobile terminal 300 proceeds if necessary.

The node message downloading method performed by the procedure as shown in FIG. 11 may be used when the moving speed of the mobile terminal 300 is slow or the distance between the selected node and the node is too long to receive all the node image information of the node message. have. However, since the mobile terminal 300 has a fast moving speed or a short distance between nodes, it may not be enough time to download all the image information as shown in FIGS. 7A to 7C. Therefore, when the mobile terminal 300 passes the node point while downloading the node image information of the node message, the information center 100 stops downloading the node image information of the corresponding node and transmits the node message of the next node. shall.

12 is a flowchart illustrating a procedure of downloading the node message by the information center 100 in the above manner.

Referring to FIG. 12, operations 551 to 559 are performed in the same manner as operations 511 to 519 of FIG. 11. After transmitting the partial image information according to the moving direction of the mobile terminal 300 by the above procedure, the information center 100 checks whether the mobile terminal 300 passes through the node point in step 561. In this case, if the mobile terminal 300 does not pass through the node point, the mobile terminal 300 transmits image information according to a different direction of the node in step 565. However, if the location of the mobile terminal 300 passes or approaches the node in the state of downloading the image information of the node, the information center 100 detects this in step 561 and proceeds to step 551 to transmit the node message of the next node. do. That is, if the position where the mobile terminal 300 moves while approaching or passes the node position of the node message currently downloaded while the information center 100 transmits a node message, the information center 100 is the node message of the currently transmitted node message. Abort the transmission and send the node message of the next node.

In addition, when the movement of the mobile terminal 300 does not pass through the node position of the currently transmitted node message or is within the set distance, the information center 100 repeats steps 563 and 565 and transmits all node messages.

After downloading the node message as described above, the information center 100 inputs the movement position information of the mobile terminal 300 in step 423. In this case, the mobile terminal 300 generates location information for moving the mobile terminal 300 from the base station of the GPS receiver or the wireless network 200 and transmits the location information to the information center 100. Then, the information center 100 inputs the movement location information of the mobile terminal 300 in step 423, and then checks whether the mobile terminal 300 enters the selected node location in step 425. In this case, if the moving position of the mobile terminal 300 is not the node position, the mobile terminal 300 checks whether it is correctly moved in the moving direction of the selected nodes. In this case, if the mobile terminal 300 is correctly moving in the direction of the selected nodes, the mobile terminal 300 proceeds to step 423.

However, if it is determined that the mobile terminal 300 does not move in the progress direction of the selected nodes, the information center 100 detects this in step 430 and notifies that the mobile terminal 300 has moved out of the moving path. Then, the mobile terminal 432 alerts it via the display unit 326 and the voice processor 328. At this time, the user of the mobile terminal 300 may detect the path departure warning and reset the movement path. At this time, if the offline mode is performed, the process returns to step 415 to reset the path again. In this case, when resetting the path to the offline mode, the information center 100 outputs the map data as shown in FIG. 4A, and the mobile terminal 300 selects nodes to download the node message as shown in FIG. 4B and then performs the above operation. Repeat it. However, if the mobile terminal 300 selects the online mode, the information center 100 transmits the map data as shown in FIG. 4A, and then transmits node messages of nodes passing through the mobile terminal 300.

If the information center 100 determines that the location of the mobile terminal 300 entered in step 423 enters the node point, the information center 100 detects it in step 425 and generates a message of the next node in step 427 to display node data and node image information. 11 or 12 is transmitted in the same manner. After downloading the node message, the information center 100 checks whether the node entered in step 429 is the last node. At this time, if the node to which the mobile terminal 300 has entered is not the last node selected, if the mobile terminal 300 proceeds correctly in the direction of the selected nodes, the process returns to step 423. When the above operation is repeated, the mobile terminal 300 enters the last node.

When the mobile terminal 300 enters the last node, the information center 100 detects this in step 429 and inputs the moving position of the mobile terminal 300 in step 433. When the mobile terminal 300 enters the destination node, the information center 100 detects this in step 435 and displays the destination arrival in step 437 and ends.

13 is a flowchart illustrating a procedure of processing a node message in the mobile terminal 300. 13, the mobile terminal 300 checks the movement path, and requests the information center 100 to transmit a node message when the mobile terminal 300 reaches the node position.

Referring to FIG. 13, when the navigation mode is selected by the user, the mobile terminal 300 transmits the current location of the mobile terminal 300 and information of a desired destination input by the user to the information center 100 in step 611. In this case, the destination information may be set as a street address, place name, building name, and the like. Then, the information center 100 receives information on the current location / destination transmitted from the mobile terminal 300, and in response, detects the current location and calculates a path. The current location detection operation is performed by receiving the current location (longitude and latitude) and destination information of the vehicle, and finding a matching place name / facility information item in the map data storage 112 to convert the latitude and longitude coordinates. The route calculation operation uses the map data storage 112 and the image information storage 122 to set an optimal route from the current location and destination information of the mobile terminal 300.

Thereafter, the information center 100 outputs information for setting a path selection method to the mobile terminal 300 and waits. In step 613, the mobile terminal 300 sets options for condensation setting such as the shortest time, the shortest path, and the road (highway, general road) to be used, and then transmits the set path selection information to the information center 100. Then, the information center 100 calculates a route using the inputted information, and downloads map data including route and VR service node indication information according to the calculated route. In step 617, the mobile terminal 300 receives and displays the downloaded map data. In this case, the downloaded map data includes a path to the desired destination of the mobile terminal 300 and all nodes capable of VR service on the path as shown in FIG. 4A.

Then, the user of the mobile terminal 300 selects nodes to display a node message from the received map data as shown in FIG. 4A. In this case, the method of selecting a node by the mobile terminal 300 may use a method of inputting numbers of nodes displayed on a map or inputting names of nodes. When the mobile terminal 300 selects the nodes desired by the user, that is, when the user of the mobile terminal 300 selects a node of interest among the nodes that become the VR service displayed on the path of the map data as shown in FIG. 4A, the mobile terminal 300 selects the node of interest. Received and selected nodes are displayed on the map data and transmitted to the information center 100. At this time, the map data generated in step 619 is generated as shown in Figure 4b. At this time, the map data as shown in FIG. 4B is shared by both the information center 100 and the mobile terminal 300. When nodes for displaying a node message are selected as described above, the movement path of the mobile terminal 300 is set.

When the movement path of the mobile terminal 300 is set as described above, the mobile terminal 300 requests the downloading of the node message of the first node to which the mobile terminal 300 passes in step 621, and the mobile terminal 300 the information center 300. Receives and displays the node message downloaded from the node. At this time, the node message transmitted from the information center 100 is composed of node data and node image information as shown in FIG. 5, and the node message can be downloaded by the procedure as shown in FIGS. 14 and 15.

Referring to FIG. 14, the mobile terminal 300 requests the information center 100 to download the node message of the first node to which the mobile terminal 300 passes in step 711. In this case, the node message is information indicating information of a next node to be performed by the mobile terminal 300, and includes node data and node image information. The node message is as described above. In this case, since the information center 100 must transmit a large amount of data when transmitting the panoramic image corresponding to the node position, first transmit partial images corresponding to the moving direction of the mobile terminal first, and then transmit partial images in adjacent directions. do.

The information center 100, which is requested to download a specific node message from the mobile terminal 300, first transmits the node data of the node message, and then the partial image information corresponding to the traveling direction of the mobile terminal 300 and the partial image information of the adjacent direction. Send them sequentially. Accordingly, when the mobile terminal 300 detects the reception of the node message in step 713, the mobile terminal 300 displays the node data received in step 715. In step 717 to step 721, the mobile terminal 300 receives and displays partial image information in a direction in which the mobile terminal 300 proceeds. Thereafter, the mobile terminal 300 receives and stores partial image information other than the moving direction while performing steps 723 and 725.

In this manner, all partial image information of the node is downloaded, and when the download is completed, all of the panorama image information having the structure shown in FIGS. 7A to 7C are received and stored. In this case, when the download of the panorama image information of the node as shown in FIGS. 7A to 7C is completed, the mobile terminal 300 detects it in step 723 and proceeds to step 625 of FIG. 13.

Then, the mobile terminal 300 receives and stores the node message downloaded in the same manner as in FIG. 14, and the mobile terminal 300 first reproduces the node data of the node message and the partial image information of the moving direction. In this case, the displayed partial image information becomes image information of a node to which the mobile terminal 300 passes next. In this case, the form displayed on the mobile terminal 300 may be one of the forms shown in FIGS. 9A to 9C. In addition, since the image information downloaded to the mobile terminal 300 is panoramic image information as shown in FIGS. 7A to 7C, the user of the mobile terminal 300 may display partial image information in a direction other than the direction in which the mobile terminal 300 proceeds if necessary.

The node message downloading method performed by the procedure as shown in FIG. 14 may be used when the moving speed of the mobile terminal 300 is slow or the distance between the selected node and the node is far enough to receive all the node image information of the node message. have. However, the mobile terminal 300 may have a short moving speed or a short distance between nodes, and thus may not have enough time to download all the image information as shown in FIGS. 7A to 7C. Therefore, when the mobile terminal 300 passes the node point while downloading the node image information of the node message, the information center 100 stops downloading the node image information of the corresponding node and transmits the node message of the next node. shall.

15 is a flowchart illustrating a procedure of another method for the mobile terminal 300 to receive a node message downloaded from the information center 100.

Referring to FIG. 15, operations in steps 751 to 761 are performed in the same manner as in steps 711 to 721 of FIG. 14. In step 762, the mobile terminal 300 checks whether the mobile terminal 300 passes through the node point while receiving and displaying partial image information according to the moving direction of the mobile terminal 300. If the mobile terminal 300 does not pass through the node point, the mobile terminal 300 performs steps 763 and 767 and downloads and stores partial image information according to the different direction of the node. However, if the mobile terminal 300 passes or approaches the node in the state of downloading the image information of the node, the mobile terminal 300 detects this in step 762 and proceeds to step 751 to request the download of the node message of the next node. That is, if the location where the mobile terminal 300 moves while approaching or passes the node location of the node message currently downloaded while the node 110 transmits a node message, the node message of the node message currently transmitted to the information center 100 is transmitted. Abort the transfer and request the download of node messages for the next node.

After receiving the node message as described above, the mobile terminal 300 checks the moving position. In this case, the mobile terminal 300 analyzes the location information received from the base station of the GPS receiver 312 or the wireless network 200, the mobile terminal 300 checks the movement. In step 627, the mobile terminal 300 checks whether or not the mobile node 300 has entered the selected node location. In this case, if the moving position of the mobile terminal 300 is not the node position, the mobile terminal 300 checks whether it is correctly moved in the moving direction of the nodes selected in step 635. In this case, if the mobile terminal 300 is moving correctly in the direction of the selected nodes, the mobile terminal 300 proceeds to step 625.

However, if it is determined that the mobile terminal 300 does not move in the direction of the selected nodes, the mobile terminal 300 detects this in step 635 and alerts that the mobile terminal has deviated from the moving path in step 636. At this time, the departure alarm is alerted through the display unit 326 and the voice processor 328. At this time, the user of the mobile terminal 300 may detect the path departure warning and reset the movement path. At this time, if the offline mode is performed, the process returns to step 617 to reset the path again. In this case, when resetting the path to the offline mode, the information center 100 outputs the map data as shown in FIG. 4A, and the mobile terminal 300 selects nodes to download the node message as shown in FIG. 4B and then performs the above operation. Repeat it. However, if the mobile terminal 300 selects the online mode, the information center 100 transmits the map data as shown in FIG. 4A, and then transmits node messages of nodes passing through the mobile terminal 300.

When the mobile terminal 300 detects an entry into the node point in step 627, the mobile terminal 300 receives the node message by requesting the information center 100 to download the node message of the next node in step 629. At this time, the node data and node image information downloaded from the information center 100 are downloaded in the same manner as in FIGS. 14 and 15. After receiving the downloaded node message, the mobile terminal 300 checks whether the node entered in step 633 is the last node. In this case, the mobile terminal 300 returns to step 625 if the node entered is not the last node selected and proceeds correctly in the direction of the selected nodes. When the above operation is repeated, the mobile terminal 300 enters the last node.

When the mobile terminal 300 enters the last node, the mobile terminal 300 detects this in step 633 and checks the movement of the mobile terminal 300 in step 638. When the mobile terminal 300 enters the destination node, the information center 100 detects this in step 639, and displays the arrival of the destination in step 641.

In the above description, FIG. 11 illustrates a procedure of downloading a node message when the information center 100 monitors the movement of the mobile terminal 300 and passes the node point. Shows incoming node messages. FIG. 13 illustrates that the mobile terminal 300 requests a download of a node message to the information center 100 whenever the mobile terminal 300 passes a node point, and the information center 100 downloads the corresponding node message according to the download request of the node message. The procedure is shown.

In addition to the above method, after the mobile terminal 300 selects nodes to download the path and node messages, the mobile terminal 300 may download and store all node messages of the selected nodes. That is, the mobile terminal 300 first selects a path and nodes to the destination before moving, and moves to the destination while replaying the message of the next node whenever passing through the node. FIG. 16 is a flowchart illustrating a procedure of receiving and reproducing a node message by the above procedure in the mobile terminal 300. Referring to FIG.

Referring to FIG. 16, when the navigation mode is selected by the user, the mobile terminal 300 transmits the current location of the mobile terminal 300 and information on a desired destination input by the user to the information center 100 in step 811. In this case, the destination information may be set as a street address, place name, building name, and the like. Then, the information center 100 receives information on the current location / destination transmitted from the mobile terminal 300, and in response, detects the current location and calculates a path. The current location detection operation is performed by receiving the current location (longitude and latitude) and destination information of the vehicle, and finding a matching place name / facility information item in the map data storage 112 to convert the latitude and longitude coordinates. The route calculation operation uses the map data storage 112 and the image information storage 122 to set an optimal route from the current location and destination information of the mobile terminal 300.

Thereafter, the information center 100 outputs information for setting a path selection method to the mobile terminal 300 and waits. In step 813, the mobile terminal 300 sets options for condensation setting such as the shortest time, the shortest path, and the road (highway, general road) to be used, and then transmits the set path selection information to the information center 100. Then, the information center 100 calculates a route using the inputted information, and downloads map data including route and VR service node indication information according to the calculated route. In step 817, the mobile terminal 300 receives and displays the downloaded map data. In this case, the downloaded map data includes a path to the desired destination of the mobile terminal 300 and all nodes capable of VR service on the path as shown in FIG. 4A.

Then, the user of the mobile terminal 300 selects nodes to display a node message from the received map data as shown in FIG. 4A. In this case, the method of selecting a node by the mobile terminal 300 may use a method of inputting numbers of nodes displayed on a map or inputting names of nodes. When the mobile terminal 300 selects the nodes desired by the user, that is, when the user of the mobile terminal 300 selects a node of interest among the nodes serving as the VR service displayed on the path of the map data as shown in FIG. Received and selected nodes are displayed on the map data and transmitted to the information center 100. At this time, the map data generated in step 619 is generated as shown in Figure 4b. At this time, the map data as shown in FIG. 4B is shared by both the information center 100 and the mobile terminal 300. When nodes for displaying a node message are selected as described above, the movement path of the mobile terminal 300 is set.

When the movement path of the mobile terminal 300 is set as described above, the mobile terminal 300 requests batch transmission of node messages of the selected nodes in step 819. That is, the mobile terminal 300 requests download of node messages of all selected nodes as shown in FIG. 4B. Then, the information center 100 sequentially downloads node messages of nodes requested by the mobile terminal 300. At this time, the node message has a structure as shown in FIG. 5 and is composed of node data and node image information. The header of the node data includes a node number of the node message. At this time, the information center 100 downloads the node data and node image information. The mobile terminal 300 receives the node messages downloaded from the information center 100 and stores them in an internal memory.

The node messages of all nodes are downloaded by the above procedure, and when the download is completed, the node image information of each node message becomes panorama image information having a structure as shown in FIGS. 7A to 7C. When the reception of the node messages downloaded from the information center 100 is completed, the mobile terminal 300 displays data and image information of the first node to pass next in step 821. In this case, the image information may be partial image information of a direction in which the mobile terminal 300 will proceed. In addition, the form displayed on the mobile terminal 300 may be one of the forms shown in FIGS. 9A to 9C. In addition, since the image information downloaded to the mobile terminal 300 is panoramic image information as shown in FIGS. 7A to 7C, the user of the mobile terminal 300 may display partial image information in a direction other than the direction in which the mobile terminal 300 proceeds if necessary.

After displaying the node image information as described above, the mobile terminal 300 checks the moving position of the mobile terminal 300 in step 823. The mobile terminal 300 analyzes the location information received from the base station of the GPS receiver 312 or the wireless network 200, the mobile terminal 300 checks the movement. In step 825, the mobile terminal 300 checks whether the mobile terminal 300 enters the selected node position. In this case, if the moving position of the mobile terminal 300 is not the node position, the mobile terminal 300 checks whether it is correctly moved in the moving direction of the nodes selected in step 831. In this case, if the mobile terminal 300 is correctly moving in the direction of the selected nodes, the mobile terminal 300 proceeds to step 823.

However, if it is determined that the mobile terminal 300 does not move in the direction of the selected nodes, the mobile terminal 300 detects this in step 831 and alerts that the mobile terminal has deviated from the movement path in step 832. At this time, the user of the mobile terminal 300 may detect the path departure warning and reset the movement path. At this time, if the offline mode is performed, the process returns to step 815 to reset the path as described above. In this case, when resetting the path to the offline mode, the information center 100 outputs the map data as shown in FIG. 4A, and the mobile terminal 300 selects nodes to download the node message as shown in FIG. 4B and then node messages of all nodes. Repeat the above operation to download the. However, if the mobile terminal 300 selects the online mode, the information center 100 transmits the map data as shown in FIG. 4A, and then transmits node messages of nodes passing through the mobile terminal 300.

When the mobile terminal 300 detects the entry of the node point in step 825, the mobile terminal 300 accesses and reproduces the node message of the next node stored in the memory of the mobile terminal 300 in step 629. The mobile terminal 300 checks whether the node entered in step 829 is the last node. In this case, the mobile terminal 300 returns to step 823 if the node entered is not the last node selected and proceeds correctly in the direction of the selected nodes. When the above operation is repeated, the mobile terminal 300 enters the last node.

When the mobile terminal 300 enters the last node, the mobile terminal 300 detects this in step 829, and confirms the movement of the mobile terminal 300 in step 835. When the mobile terminal 300 enters the destination node, the information center 100 detects this in step 837, and displays and arrives at the destination in step 839.

As described above, there is an advantage that the mobile terminal can grasp the entire foreground by confirming in advance the actual image of the next feature using the current location information received from the GPS and the moving direction. In addition, when displaying the image of the node as described above, the image information can be used as a panoramic image, it can also be a general image. In addition, the image information of the direction in which the mobile terminal proceeds among the image information may be downloaded and displayed according to the amount of data of the down image information and the moving speed of the mobile terminal 300. In addition, when the image information of the node to be downloaded is a panorama image, image information in a direction other than the progress direction may be displayed.

Claims (11)

It has image information on the feature of the node, the node image information is composed of partial image information according to the progress direction, and has a database for storing a node message including the node image information and a database for storing map data In a navigation system having an information center and a mobile terminal, the information center transmits the node message, Setting a route according to the current location and destination information of the mobile terminal and generating map data including nodes and transmitting the map data to the mobile terminal; Identifying nodes selected by the mobile terminal from the transmitted map data, and downloading the selected first node message; Downloading the node message of the next selected node each time the mobile terminal reaches a node point; And when the mobile terminal reaches the last node point, downloading of the node message is terminated. The method of claim 1, wherein downloading the node message comprises: Transmitting node data of a node message when entering the node point; Inspecting the moving direction of the mobile terminal and transmitting partial image information of the node image information corresponding to the moving direction of the mobile terminal; And transmitting the partial image information in a direction adjacent to the moving direction of the mobile terminal sequentially after transmitting the partial image information in the moving direction. The method of claim 2, wherein downloading the node message comprises: If the mobile terminal passes the node point in the step of transmitting the node image information, the method further comprising the step of terminating the download of the node image information and downloading a node message of the next node. The method as claimed in claim 2, wherein the node image information is a panoramic image of a feature of the node in a 360 degree direction, and the image information is divided into partial image information corresponding to each direction. The method as claimed in claim 4, wherein the node image information comprises 12 partial image information along 12 directions. 3. The node message of claim 2, wherein the node message comprises a name of a node, a road type, a link type, and node image information, wherein the node image information is a panoramic image of a feature of the node in a 360 degree direction. The image information is divided into partial image information corresponding to each direction. 7. The method as claimed in claim 6, wherein the node point is an intersection, a toll gate, an interchange, and a point near a destination. The method as claimed in claim 1, further comprising a step of checking whether the movement of the mobile terminal is moved to a selected node or returning to the path setting process. It has image information on the feature of the node, the node image information is composed of partial image information according to the progress direction, and has a database for storing a node message including the node image information and a database for storing map data In a navigation system having an information center and a mobile terminal, the mobile terminal displays the node message, Transmitting navigation information including the current location and destination information of the mobile terminal to the information center; Receiving map data including nodes generated in the information center; Selecting nodes for receiving the node message from the received map data, and transmitting information of the selected nodes to the information center; Displaying the selected first node message downloaded from the information center; Downloading and displaying a node message of the next selected node each time the node point is reached, And when the last node point is reached, downloading of the node message is terminated, and when the destination node is reached, displaying the destination arrival and ending. The method of claim 9, wherein downloading the node message comprises: Downloading a node message when entering the node point; Displaying node data in the downloaded node message; Displaying the received partial image information when the reception of the partial image information of the node image information corresponding to the moving direction of the mobile terminal is completed; And receiving and storing partial image information in a direction adjacent to the moving direction of the mobile terminal while displaying partial image information in the moving direction. It has image information on the feature of the node, the node image information is composed of partial image information according to the progress direction, and has a database for storing a node message including the node image information and a database for storing map data In a navigation system having an information center and a mobile terminal, the mobile terminal displays the node message, Transmitting navigation information including the current location and destination information of the mobile terminal to the information center; Receiving map data including nodes generated in the information center; Selecting nodes for receiving the node message from the received map data, requesting batch transmission of node messages to the selected nodes; Storing node messages of the selected nodes downloaded from the information center; Displaying the first node message being stored when moved; Reading and displaying a node message of the next selected node each time the node point is reached, And displaying a message of a destination node of the node message when the last node point is reached, and displaying and terminating the destination arrival when the destination is reached.