JP4192325B2 - Car navigation information transmission method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a car navigation information transmission method.
[0002]
[Prior art]
Conventionally, driving information such as the position of a car is transmitted using an original protocol between car navigation systems, or between a car navigation system and a PC, or between a car navigation system and a mobile terminal device using a mobile phone, etc. There has been a technique for displaying travel information such as the vehicle position on the screen of the device.
[0003]
[Problems to be solved by the invention]
However, when the application is operated in cooperation in this way, it is necessary to incorporate software having a common communication protocol in each device. Distribution of upgrade software when software with the same communication protocol is installed in all devices that communicate with the car navigation system is very expensive. As a result, communication with the car navigation system is required. The other party is limited. Therefore, much of the appeal of applications that connect car navigation systems and other equipment has been lost due to these problems.
[0004]
[Means for achieving the object]
In order to solve the above problems and achieve the object of the present invention, the car navigation information transmission method of the present invention is specified as the operation of the following apparatus.
That is, the in-vehicle navigation device used in the car navigation information transmission method of the present invention includes an electronic map in addition to a device body having a GPS positioning device, an orientation detection device, a distance detection device, a display device, an arithmetic processing device, and a data transmission / reception device. data files, HTML files, and storage equipment and the HTTP server that stores the content of such class files are installed.
In addition, a client-side terminal device that is connected to and communicates with the in-vehicle navigation device using the HTTP protocol is provided, and an application based on information transmitted from the in-vehicle navigation device is executed by the client-side terminal device.
Further, a PPP connection is established between the client side terminal device and the in-vehicle navigation device through a communication device so that the browser of the client side terminal device accesses the HTTP server of the in-vehicle navigation device using the HTTP protocol. Then, an HTML file is automatically generated from travel data such as an address near the travel position and estimated arrival time to the destination, and an HTML file in which travel information is described is provided by an HTTP server of the in-vehicle navigation device.
[0008]
As a preferred mode of the present invention, permission / denial of access to the HTTP server of the in-vehicle navigation device is determined based on the telephone number notification data.
[0009]
Furthermore, as a preferred embodiment of the present invention, the content provided from the HTTP server of the in-vehicle navigation device is determined based on the telephone number notification data, and the content provided from the HTTP server is changed. Yes .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a car navigation information transmission method according to the present invention will be described below with reference to the accompanying drawings.
[0011]
FIG. 2 shows an outline of the system configuration of the car navigation system used in the present invention.
As shown in the figure, this car navigation system includes a display device F03 for displaying an electronic map, a storage device F02 for storing contents such as an electronic map data file, an HTML file, a class file, and a GPS positioning device F05 for positioning an absolute position. , An azimuth detecting device F06 and a distance detecting device F07 for measuring the relative position, an arithmetic processing unit F01 for performing current position calculation and data processing, and a data transmitting / receiving device F04 for exchanging data with the outside of the vehicle. The arithmetic processing unit F01 includes a CPU, a ROM, a RAM, and the like, and is connected to each of the above devices by an I / O circuit unit F08.
[0012]
FIG. 1 shows an embodiment of the car navigation information transmission method of the present invention.
The car navigation information transmission method of the present embodiment is roughly divided into two parts, a server side M01 and a client side M06. The server side M01 and the client side M06 are connected by PPP (point-to-point protocol) connection by wireless communication such as radio waves.
[0013]
The server side M01 includes a car navigation system (vehicle-mounted navigation device) M02 and a data communication device M03, and an HTTP (Hyper Text Transfer Protocol) server is mounted on the car navigation system. The HTTP server provides an HTML (Hyper Text Markup Language) file and a Java applet (class file) to the client in response to a request from the client using the HTTP protocol.
[0014]
The client side M06 includes a terminal device M05 and a data communication device M04 equipped with a Java-compatible browser having a Java execution environment. The browser on the client side downloads the Java applet from the server side M01 to the client side M06 by accessing the HTTP server on the server side by using the HTTP protocol, and the Java applet on the Java VM (Java Virtual Machine). Execute.
[0015]
Next, the operation of the car navigation information transmission system of the present embodiment will be described below with reference to FIG.
This figure shows a communication operation flowchart between the in-vehicle navigation device on the server side and the browser on the client side.
[0016]
First, in step S01, the browser on the client side issues a PPP (Point-to-Point Protocol) connection request to the in-vehicle navigation device on the server side, and the server side responds to this request with a PPP with the browser in step T01. Perform the connection operation. As a result, a PPP connection is established so that communication can be performed between the server and the client by TCP (Transmission Control Protocol) / IP (Internet Protocol).
[0017]
When the PPP connection is established, the terminal device on the client side inputs a URL (Uniform Resource Locator; a description method for uniformly accessing information resources placed on the network) from the browser in step S02, Proceeding to step S03, a socket connection request is issued to the public port number (80) of the HTTP server of the in-vehicle navigation device.
[0018]
At this time, the server side is in a state of waiting for a socket connection request in step T02, and if there is a socket connection request, it accepts the socket connection request in step T03 and issues a response signal to the client side. Thus, when the socket connection is established, the browser on the client side writes the requested HTML file name and class file name (Java applet) in the HTTP request header and transmits them to the HTTP server in step S04.
[0019]
On the HTTP server side, in step T04, the file having the requested file name is extracted from the storage device and sent to the browser. When the transmission of the file is completed, the HTTP server side disconnects the socket connection in step T05, returns to step T02, and waits for a socket connection request. The fact that the socket connection has been disconnected is also sent to the client side, and the client side disconnects the socket connection in step S05. Repeat downloading this file until the necessary files are available.
[0020]
The operation flow on the client side proceeds to step S06, where it is determined whether or not downloading of a necessary file has been completed. If it has not been completed, the process returns to step S03, and the operations of steps S03 to S06 are repeated.
[0021]
When the download of the necessary file is completed, the process proceeds to step S07. In the browser on the client side, the downloaded Java applet is executed on JavaVM. The executed Java applet issues a socket connection request to the application communication port number (this number is described in the applet) of the in-vehicle navigation device in the next step S08.
[0022]
At this time, the application communication port on the server side is in the socket connection request waiting state in step T06, and when a socket connection request is received from the client side, the process proceeds to step T07 and changes to the socket connection request acceptance state. Send.
[0023]
When the socket connection is established, data exchange is performed between the in-vehicle navigation device on the server side and the Java applet executed on the client side using a communication protocol unique to the application. For example, when it is desired to display the travel position on the server side on the client side, map data and travel position coordinates near the travel position are transmitted from the in-vehicle navigation device to the applet on the client side. The map drawing program incorporated in the applet interprets the received map data and displays the map and the travel position mark on the browser screen. This operation is performed in steps S09, S10, and T08 surrounded by an alternate long and short dash line.
[0024]
When browsing of the driving information of the in-vehicle navigation device ends and the applet is terminated, the applet disconnects the socket connection with the application communication port in step S11. This disconnection is notified to the server-side application communication port, and the server-side socket connection disconnection is performed. Thereafter, the client side proceeds to step S12, and the browser disconnects the PPP connection with the in-vehicle navigation device on the server side. As a result, the PPP connection from the server side to the browser is also disconnected in step T10.
[0025]
It should be noted that in the car navigation information transmission method of this embodiment, the browser on the client side exchanges data such as travel information with the in-vehicle navigation device before downloading the Java applet from the HTTP server of the in-vehicle navigation device. The point is that they do not know the communication protocol to be used.
In other words, the client-side terminal device supports the HTTP protocol, and as long as there is a browser having a Java execution environment, communication for exchanging data such as travel information with the in-vehicle navigation device from the HTTP server of the in-vehicle navigation device. This means that a Java applet that knows the protocol can be downloaded to a browser and an application linked with the in-vehicle navigation device can be executed.
[0026]
Next, as another embodiment of the present invention, a car navigation information transmission method capable of accessing an HTTP server of an in-vehicle navigation device from a browser that does not have a Java execution environment will be described below with reference to FIG. Since this system cannot use a Java applet, it provides a driving information service based on HTML.
[0027]
For example, assuming that a route guide application is currently being executed on an in-vehicle navigation device, this route guide application has information such as an address near the driving position and an arrival time to the destination. An HTML file is automatically generated from these pieces of information, and an HTML file in which travel information is described is provided from the HTTP server of the in-vehicle navigation device to a browser that does not have a Java execution environment.
[0028]
This will be described in more detail with reference to FIG. Initially, the in-vehicle navigation device on the server side is waiting for a PPP connection request in step T01. If there is a PPP connection request from the browser on the client side in step S01, the process proceeds to step T02 to determine whether or not access to the telephone number of the PPP connection request terminal is permitted. If permitted, the process proceeds to step T03 to set the access flag to permitted, and then proceeds to step T05. If not permitted, the process proceeds to step T04, the access flag is set to non-permitted, and then the process proceeds to step T05. In step T05, a PPP connection is established. At the same time, the client side enters a PPP connection established state in step S02.
[0029]
Thereafter, in step S03, an HTTP request header is transmitted from the client side to the server side. In response to this, the server checks the state of the flag in step T06. If the access flag indicates permission, the process proceeds to step T07, and the request file written in the HTTP request header is transmitted to the client side. If it is determined in step T06 that the access flag indicates non-permission, an HTML file notifying access denial is sent to the client side. The contents of these files are processed on the client side is omitted the description of details.
[0030]
A method for determining permission / denial of access to the HTTP server of the vehicle-mounted navigation device in the above description based on the telephone number notification data will be described below.
The criteria for judging whether access is permitted or not are as follows.
a. If the telephone number of the terminal device requesting the PPP connection is in the HTTP server access permission list registered in advance in the in-vehicle navigation device, the access flag is set to permit.
b. If the telephone number of the terminal device that has requested the PPP connection matches the telephone number included in the destination information in the route guide, the access flag is set to permit.
c. The access flag is set to permit for all the telephone numbers of the terminal devices that have requested the PPP connection.
[0031]
As described above, not only permission / denial of access to the vehicle-mounted navigation device, but also the contents provided can be changed according to the telephone number of the client. That is, it is possible to make a determination based on the client telephone number notification data and change the content provided to the client from the HTTP server of the in-vehicle navigation device.
For example, a provided content list as shown in FIG. 5 is registered in advance in the in-vehicle navigation device, and an HTML file provided by the HTTP server of the in-vehicle navigation device is determined from the telephone number notification data and the provided content list. . Alternatively, an accessor name is determined from the telephone number notification data and the provided content list, and an HTML file provided by the HTTP server of the in-vehicle navigation device is automatically generated.
[0032]
【The invention's effect】
By using the navigation information transmission method of the present invention, a mobile object can be obtained by communication using a mobile phone or the like between car navigation systems, between a car navigation system and a PC (personal computer), or between a car navigation system and a mobile terminal device. If you use the original communication protocol to send the travel information and link the applications that display the travel information on the image of the remote device, there is no need to install software with a common communication protocol in each device. . Therefore, it is not necessary to distribute software to remote devices or to distribute upgrade software when a new function is incorporated into an application.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a system configuration used in a car navigation transmission method of the present invention.
FIG. 2 is a block diagram showing a system configuration of a car navigation system.
FIG. 3 is a flowchart showing a communication operation between a car navigation system and a browser in an embodiment of the present invention.
FIG. 4 is a flowchart showing an access right determination operation for a server using telephone number notification data in another embodiment of the present invention.
FIG. 5 is a chart showing an example of a provided content list used in another embodiment of the present invention.
[Explanation of symbols]
M01 ... Server side device arrangement, M02 ... Car navigation system (in-vehicle navigation device), M03, M04 ... Data communication device, M05 ... Java-compatible browser-equipped terminal device, M06 ... Client side device arrangement

Claims (3)

GPS positioning device, direction detection device, the distance detecting device, a display device, the processing unit, the in-vehicle navigation apparatus body having a data transceiver, a storage equipment for storing electronic map data files, HTML files, content such as class files a vehicle navigation system equipped with HTTP server receives the information which the onboard navigation device sent from, between the client-side terminal equipment for executing an application using the information, to connect with the HTTP protocol A car navigation information transmission method for communicating ,
Establishing a PPP connection through communication equipment between the client-side terminal device and the in-vehicle navigation device,
Access to the HTTP server of the in-vehicle navigation device from the browser of the client side terminal device using the HTTP protocol,
The HTML file is automatically generated from travel data such as an address near the travel position and estimated arrival time to the destination, and an HTML file in which travel information is described by an HTTP server of the in-vehicle navigation device is provided.
Car navigation information transmission method characterized by the above . The car navigation information transmission method according to claim 1, wherein access permission / denial to the HTTP server of the in-vehicle navigation device is determined based on telephone number notification data. Wherein the content of the content provided from the HTTP server of the in-vehicle navigation device, determines based on the telephone number notification data, to claim 1 or 2, characterized in that to change the contents of the content provided from the HTTP server The described car navigation information transmission method.

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