KR20030060706A - Method for connecting and disconnecting internet for urgent message transmission in telematics - Google Patents

Abstract

PURPOSE: A method of disconnecting Internet connection for transmitting an emergent message in a car telematic system is provided to automatically release the Internet connection, and to transmit the emergent message in an emergent situation, thereby quickly coping with the emergent situation in a car. CONSTITUTION: A car telematic system repeatedly checks whether an emergent situation such as an accident occurs(S41). If so, the car telematic system decides whether the Internet is connected(S42). If so, the car telematic system switches on a signal path between a wireless modem and a controller of the car telematic system(S43). The car telematic system cancels Internet access(S44). If the Internet is not connected, the car telematic system transmits an emergent message for informing of the emergent situation(S45).

Description

Internet connection disconnection method for emergency message transmission in vehicle information terminal {METHOD FOR CONNECTING AND DISCONNECTING INTERNET FOR URGENT MESSAGE TRANSMISSION IN TELEMATICS}

The present invention relates to a method for disconnecting the Internet for emergency message transmission in a vehicle information terminal, in particular, when an emergency situation such as an accident occurs when the vehicle information terminal is connected to the Internet, the Internet connection for emergency message transmission. The present invention relates to a method for releasing an Internet connection for transmitting an emergency message in an information terminal for a vehicle, which is capable of automatically responding to an emergency situation in a vehicle.

In general, a vehicle information terminal (Telematic System) mounted on a vehicle performs a function of transmitting the vehicle's status information, including vehicle identification information and location information, to the central control system. Request a rescue from the central control system, and in case of theft, use the vehicle's identification number and location information to track the location of the stolen vehicle, and access a wireless Internet network when connecting a portable computer such as a laptop. Perform the functions that support it.

A vehicle information terminal for performing such a function is shown in FIG. 1, which is a schematic diagram of a general vehicle information terminal. Referring to FIG. 1, the position of a vehicle itself from a GPS satellite through a GPS antenna ANT1. GPS receiver 11 for receiving GPS satellite signals including information, a sensing unit 12 for sensing the state of various devices of the vehicle, a data input unit 13 for inputting data by the user, and sensing Controls various operations such as storing and updating information, self-identification information and location information, controlling processing according to data input, and controlling the transmission of vehicle status information including vehicle identification information and location information through a mobile communication network. Communication with the central control system via the micro control unit 14 and the communication antenna ANT2 under the control of the micro control unit 14. A CDMA modem 15 for displaying, a display unit 16 for outputting a screen necessary for operation, a voice processing unit 17 for outputting set information as voice, and an RS-232C interface unit 18 for connecting a PC. It includes.

In addition, the vehicle information terminal includes a power supply unit 19. The power supply unit 19 receives a voltage of approximately 12 V from the battery B1 of the vehicle, and provides an operating voltage V1 required for each unit of the apparatus ( 2.5V, 3.3V and 5V) and system backup voltage (VB1) (3.3V).

In such a vehicle information terminal, a PC can be connected to the Internet, and a control unit of the vehicle information terminal can connect a wireless telephone network to transmit information such as an emergency message.

FIG. 2 is a schematic block diagram of a conventional vehicle information terminal. Referring to FIG. 2, a schematic block diagram of a conventional vehicle information terminal is briefly described. An RS-232C interface 28 and a wireless modem 25 in a PC may be described. When connected to the Internet through the wireless modem 25 is connected to the Internet using a transmission control protocol / Internet Protocol (TCP / IP).

However, in such a conventional vehicle information terminal, the vehicle information terminal control unit 24 cannot release the Internet connection in the state of being connected to the Internet, and in order to release the connection of the Internet, the Internet connection must be released from the PC. In case of an urgent situation such as a collision or collision of a vehicle, an emergency message cannot be sent automatically when connected to the Internet, and a driver or passenger must release the Internet connection through a PC. There is a problem that it is not possible to send an emergency message promptly, and thus delay the processing after an accident in case of an accident.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and therefore, an object of the present invention is to connect to the Internet for urgent message transmission when an emergency situation such as an accident occurs while the vehicle information terminal is connected to the Internet. The present invention provides a method for releasing an Internet connection for transmitting an emergency message in a vehicle information terminal that automatically releases a message.

1 is an overall schematic diagram of a general vehicle information terminal.

2 is a schematic block diagram of a conventional information terminal for a vehicle.

3 is a block diagram for disconnecting the Internet for carrying out the present invention.

4 is a flowchart showing a method of disconnecting the Internet for emergency message transmission according to the present invention.

Explanation of symbols on the main parts of the drawings

32: sensing unit 34: control unit for a vehicle information terminal

35: wireless modem 38: RS-232C interface

SW: Path Switching PC: Personal Computer

Q1: switching transistor R1: bias resistor

As a technical means for achieving the above object of the present invention, the method of the present invention is a method for disconnecting the Internet repeatedly for detecting an emergency situation such as an accident in the method for disconnecting the Internet for emergency message transmission in a vehicle information terminal. Stage 1; A second step of determining whether a state of being connected to the Internet when an emergency occurs; A third step of switching on signal paths of the wireless modem and the vehicle information terminal control unit when connected to the Internet; And a fourth step of releasing the Internet connection, wherein the emergency message for notifying the emergency situation can be transmitted after the fourth step is not connected to the Internet in the second step or after performing the fourth step. .

Hereinafter, a block configuration for disconnecting the Internet for carrying out the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram for disconnecting the Internet for carrying out the present invention. Referring to FIG. 3, a block diagram for disconnecting the Internet for carrying out the present invention is provided in a wireless manner providing an Internet access and a wireless telephone network access environment. A modem 35, a PC providing an internet connection state, a sensing unit 32 for detecting a state of various vehicles including an accident, an emergency situation from the sensing unit 32, and an internet connection from the PC. Monitoring the status and controlling the Internet connection when an internet connection occurs during an emergency, and then interfacing the signal between the PC and the wireless modem 35 with the vehicle information terminal control unit 34 for controlling emergency message transmission, RS-232C interface 38 that operates in high-activity according to the switching signal Ssw of the vehicle information terminal control unit 34, the wireless modem 35 and the vehicle information terminal control A signal path between a 34 and a switching unit (SW) for switching the signal path operates as a low-active in accordance with the switching signal (Ssw) of the vehicle information terminal controller (34).

Here, the signal will be described based on the vehicle information terminal control unit 34, where SS is a PC Internet connection status signal, SD1 is an emergency detection signal, Ssw is a switching signal, TX is a transmission signal, RX is a reception signal, DCD (DATA CARRIER DETECT) is a signal that the wireless modem notifies the information terminal control unit 34 of the vehicle when the carrier is coming from the remote modem through the communication line in the data communication, the data carrier detection signal, RTS (REQUEST TO SEND) The signal for requesting data transmission, CLTS (CLEAR TO SEND), is a vehicle information terminal control unit 34, which is a data communications equipment (DCE), from a wireless modem 35, which is a data terminal equipment (DTE). A signal indicating that data is ready to be received, DTR (DATA TERMINAL READY), waits for a data terminal to indicate that the wireless modem 35, which is a DTE, is ready to send or receive data. It is a signal.

4 is a flowchart showing a method of disconnecting the Internet for emergency message transmission according to the present invention.

Operation of the preferred embodiment of the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to FIGS. 3 and 4, the method for disconnecting the Internet for emergency message transmission in the vehicle information terminal according to the present invention will be described first. In the first step (S41), an emergency situation detection such as an accident is repeatedly and repeatedly performed. When the sensing unit 32 shown in FIG. 3 detects an emergency situation detection signal such as an airbag operation that operates when the vehicle collides and provides the vehicle information terminal control unit 34, the vehicle information terminal control unit 34 is provided. The control unit repeatedly detects whether an emergency situation detection signal is input from the sensing unit 32.

In the second step (S42), when an emergency occurs, it is determined whether a state of being connected to the Internet is input. This means that an emergency situation detection signal of the detection signal is input from the sensing unit 32 so that the vehicle information terminal controller 34 If it is determined that an emergency occurs, it is determined whether the PC is currently connected to the Internet based on the Internet connection status signal SS from the PC.

Then, in the third step (S43), when connected to the Internet, the signal path of the wireless modem and the vehicle information terminal controller is switched on, which is controlled by the switching signal Ssw of the vehicle information terminal controller 34 for the vehicle. The signal path switching unit SW connects the signal path between the information terminal controller and the wireless modem 35.

This will be described in detail with reference to FIG. 3. The vehicle information terminal controller 34 provides a switching signal Ssw having a high (H) level. As a result, the switching transistor Q1 is turned on so that the signal path switching unit ( Low level is provided to SW) and RS-232C interface 38. At this time, since the signal path switching unit SW is low active, the signal path switching unit SW is switched on so that the signal paths of the wireless modem 35 and the vehicle information terminal control unit 34 are controlled. On the other hand, the RS-232C interface 38 is inactive since it is inactive.

Finally, the fourth step (S44) is to release the Internet connection, which provides the DTR (DATA TERMINAL READY) indicating the data transmission ready state by the vehicle information terminal control unit 34 to the wireless modem 35 The wireless modem 35 releases the Internet connection.

Specifically, referring to FIG. 3, the vehicle information terminal controller 34 maintains the DTR signal at a high level for a predetermined time, which is transmitted to the wireless modem 35 through the signal path switching unit SW. In the wireless modem 35, the vehicle information terminal control unit 34 releases the Internet connection by the DTR signal.

Through this process, the emergency message for notifying the emergency situation can be transmitted after the fourth step is not connected to the Internet or after the fourth step (S45).

According to the present invention as described above, when an emergency situation such as an accident occurs in the state in which the vehicle information terminal is connected to the Internet, the emergency situation in the vehicle by automatically disconnecting the Internet connection for the transmission of an emergency message. There is a special effect that allows you to respond quickly.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (3)

In the vehicle information terminal for disconnecting the Internet for emergency message transmission method, A first step of continuously checking an emergency situation detection such as an accident; A second step of determining whether a state of being connected to the Internet when an emergency occurs; A third step of switching on signal paths of the wireless modem and the vehicle information terminal control unit when connected to the Internet; A fourth step of releasing the Internet connection, In the second step, after being not connected to the Internet or performing the fourth step, an emergency message for notifying an emergency situation can be transmitted. Way. The method of claim 1, wherein the third step Emergency message in the vehicle information terminal, characterized in that the signal path switching unit (SW) is connected to the signal path of the vehicle information terminal control unit and the wireless modem 35 by the switching signal (Ssw) of the vehicle information terminal control unit 34. How to disconnect from the internet for sending. The method of claim 1, wherein the fourth step Vehicle information, characterized in that the wireless modem 35 releases the Internet connection by providing a data modem ready data transmission (DTR) indicating the data transmission ready state by the vehicle information terminal control unit 34 to the wireless modem (35). Internet disconnection method for sending an emergency message from a terminal.