KR100386286B1 - Emergency call signal transmitting apparatus and method using mobile communication device - Google Patents

Abstract

The present invention relates to an apparatus and method for transmitting an emergency rescue signal using a mobile communication terminal. In the conventional method for estimating a location using a mobile communication terminal, only an approximate position can be estimated and a considerable time is required for accurate position estimation. In cities, there is a demand for a method for estimating the exact location of a caller at a faster time. Accordingly, the present invention provides a keypad having a rescue request button; A mobile communication terminal provided with an RF module and a modem unit connected to an antenna, wherein the power supply unit is connected to an arbitrary port of the modem unit and supplies power to a flash, and a predetermined time interval is provided by a charging circuit by a capacitor and a relay. By controlling the power applied to the power supply on / off by a flashing control unit for flashing the flash, and the charge detection unit for detecting the capacitor charging of the flashing control unit to turn on the power supply by a flash ( Flash to emit light so that the emergency responders can find and rescue the caller who requested the emergency rescue in a shorter time.

Description

EMERGENCY CALL SIGNAL TRANSMITTING APPARATUS AND METHOD USING MOBILE COMMUNICATION DEVICE}

The present invention relates to an apparatus and method for transmitting an emergency rescue signal using a mobile communication terminal. In particular, the terminal emits a flash so that the emergency rescue personnel can find and rescue the location of the caller who requested the emergency rescue at a faster time. The present invention relates to an emergency rescue signal transmission apparatus and method using a mobile communication terminal.

There are many ways to track the position of a moving object in a wireless communication system. Among the methods currently applied to the CDMA cellular system, the method can be largely classified into a method requiring a terminal modification and a method requiring no terminal modification.

First of all, there is a method of using a GPS (Global Positioning System) among the methods that require modification of the terminal. For this purpose, the GPS receiver must be mounted in the terminal that the subscriber is carrying.

When a user of a terminal equipped with such a GPS receiver operates an GPS receiver by pressing a specific button (rescue request button) of the terminal in an emergency situation, at least three GPS receivers mounted on the terminal are determined. If you want to receive a signal from four or more GPS satellites to calculate the distance between the terminal and each satellite, and calculate the position of the terminal using the additional information received from the GPS satellites.

The calculated position is automatically transmitted to the location requiring the subscriber's location information through the CDMA cellular network.

On the other hand, there are many methods that do not require the modification of the terminal, among which the most commonly used method is the method of using the arrival time (TOA), the method of using the reception angle (AOA), the time difference of arrival (TDOA) ), And the like.

First, a method of using the arrival time (TOA) receives a signal transmitted from the terminal from several base stations around the terminal, each base station measures the arrival time of the received signal to find the distance between the terminal and the base station, A virtual circle with a radius is drawn around the base station.

In this way, it is a method of estimating the position of the terminal at the intersection of the obtained circles.

Next, a method using the receiving angle (AOA) receives a signal transmitted from a terminal at various base stations around the terminal, and each base station measures a reception direction of the received signal and draws a virtual line in that direction. It is a method of estimating the intersection point as the location of the terminal.

Next, a method of using a time difference of arrival (TDOA) receives a signal transmitted from a terminal at various base stations around the terminal, draws a hyperbola using the arrival time difference of the signal received at each base station, and the points where the hyperbolas cross each other. Is a method of estimating the position of the terminal.

However, since the location tracking method using the GPS system requires the addition of a GPS receiver, the terminal manufacturing cost increases, the terminal becomes bulky and heavy, and the GPS receiver also needs to use the power of the terminal battery. There is a problem that the consumption is increased.

In addition, since a signal transmitted from a GPS satellite reaches a terminal on the earth, it becomes a very weak signal. Therefore, when there is an obstacle between a terminal and a GPS satellite such as an urban area or indoors, reception of a GPS signal is difficult and performance is degraded. There is this.

On the other hand, the method of using the arrival time difference (TOA) and the arrival time difference (TDOA) that does not require modification of the terminal should use at least three or more base stations around the terminal, and at least two methods of using the reception angle (AOA). The above base stations should be used, but when the subscriber is in the suburbs, there are not many cases where there are two or three base stations nearby.

Therefore, in the suburban area, there are only base stations in the cell to which the subscriber belongs, and other base stations are located at a very long distance so that the signal of the terminal is not easy to reach, and even if the signal is reached, the signal is weak and there are many errors. Location tracking is not easy

As such, there is a problem in suburban areas that it is difficult to estimate the location of the subscriber using only one method such as arrival time (TOA) or reception angle (AOA).

Therefore, the conventional position estimation method as described above can only estimate the approximate position, and since a considerable time is required for accurate position estimation, there is a need for a method for estimating the exact position of the caller at an earlier time during an emergency rescue. It is a situation.

Therefore, the present invention has been created to solve the above-mentioned conventional problems, and by emitting a flash (Flash) in the terminal, the emergency rescue personnel can find and rescue the location of the caller who requested the emergency rescue in a faster time. An object of the present invention is to provide an emergency rescue signal transmission apparatus and method using a mobile communication terminal.

1 is a block diagram showing the configuration of an emergency rescue signal transmitting apparatus for emitting a flash according to the present invention.

Figure 2 is a flow chart showing the location tracking process of the mobile communication terminal having a rescue signal transmitting apparatus according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: power supply 20: flashing control

30: charge detection unit

The present invention for achieving the above object, and a keypad having a rescue request button; A mobile communication terminal having an RF module and a modem unit connected to an antenna, the mobile terminal comprising: a power supply unit connected to a predetermined port GPIO 0 for supplying power to a flash, and a charging circuit by a capacitor and a relay; And a flashing controller for controlling the power applied to the power supply on / off at a predetermined time interval and flashing the flash, and a charge detector for turning on the power supply by detecting whether the flashing controller is charged with a capacitor. do.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an emergency rescue signal transmitting apparatus for emitting a flash according to the present invention.

As shown therein, a keypad KBD having a rescue request button; In a general mobile communication terminal equipped with an RF module (2) and a modem unit (1) connected to the antenna (ANT), connected to the universal input / output port (GPIO 0) of the modem unit 1 flash The power applied to the power supply unit 10 at a predetermined time interval by the power supply unit 10 for supplying power to the flash and the charging circuit by the capacitor C1 and the relay RY The flashing control unit 20 for flashing the flash, and the charge detection unit 30 to detect whether the flashing control unit 20 charges the capacitor (C1) to turn on the power supply unit 10.

In this case, the rescue request button may be set as a duplicate function in any button of the keypad, or may be configured by further comprising a separate button.

First, when the level of the general-purpose input / output port GPIO 0 is 'low', the power supply unit 10 turns off the transistor TR1. Thus, the source of the P-type MOS transistor FET1 is sourced. The voltage level applied to the signal is turned off because the voltage level is applied through the resistor R1.

In contrast, when the level of the general-purpose input / output port GPIO 0 is 'high', the transistor TR1 is turned on, and thus the gate of the P-type MOS transistor FET1 is turned on because it is turned on. To supply power to the flash.

Of course, the power supplied to the flash is the power applied from the flashing control unit 20.

Next, the relay RY is supplied with a power supply voltage VCC to the closed contact point B, and the open contact point A is connected to the power supply unit 10 to connect the open contact point A and the closed contact point B. The switching contact for switching is grounded through capacitor C1.

Accordingly, when the relay RY is turned on, the switch contacts the close contact B and the capacitor C1 is charged by the voltage VCC applied to the close contact B. When the relay RY is turned on, the switch contacts the contact point A to apply the charging voltage of the capacitor C1 to the power supply 10.

When the relay RY is turned off again, the switch contacts the close contact B to continuously charge the capacitor C1.

Next, the charge detector 30 receives a reference voltage at the inverting terminal (-) and receives a charge voltage of the capacitor C1 at the non-inverting terminal (+), and when the charge voltage is greater than the reference voltage, Comparator COMP1 outputs a signal.

At this time, since the output end of the comparator COMP1 is connected to the other end of the coil of the relay 20 having one end grounded, the output of the relay RY while the 'high' level is output from the comparator COMP1. The switching contact is turned on.

Of course, when the charge voltage of the capacitor C1 is lower than the reference voltage level, the low level is output and the relay RY is turned off.

In addition, the output terminal of the comparator COMP1 is connected to the general-purpose input / output port GPIO 1 of the modem unit 1, and when the 'high' level is output from the comparator COMP1, the capacitor C1 charges a predetermined level. In response to the determination, the power supply unit 10 is turned on by outputting a high level signal from the other port GPIO 0.

On the other hand, when the 'low' level is output, it is determined that the capacitor (C1) is discharged, the other port (GPIO 1) to output a 'low' level signal to turn off the power supply (10).

That is, the operation of the apparatus for transmitting the rescue request signal by emitting the flash as described above will be described as follows.

Initially, since the relay RY of the flashing control unit 20 is connected to the closed contact B, the capacitor C1 connected to the switch contact is charged.

Then, when the charge detection unit 30 detects the charge level of the capacitor C1 and exceeds the predetermined reference level, the charge unit 30 outputs a signal of the 'high' level to turn on the relay RY and the modem unit 1. Outputs a charge completion signal to a predetermined port (GPIO 1).

Accordingly, the modem unit 1 turns on the power supply unit 10 by setting the state of the port GPIO 0 to which the power supply unit 10 is connected to 'high', thereby relaying the relay RY of the flashing control unit 20. The charging voltage of the capacitor C1 applied through the light is applied to the flash.

Of course, when the charge level of the capacitor C1 is below the reference voltage, the relay RY is turned off to recharge the capacitor C1, and the power supply 10 is also turned off.

As a result, the flash is flashed by repeating the above process.

Next, FIG. 2 is a flowchart illustrating a location tracking process of a mobile communication terminal having a rescue signal transmitting apparatus according to the present invention.

As shown in the figure, when the user makes an emergency rescue request using the mobile communication terminal, the terminal transmits a password to remotely control the flash emission to the emergency rescue center (S11).

Next, the emergency rescue center receiving the rescue request signal confirms the approximate location of the rescue requester (S12), and then dispatches emergency rescue personnel to the location (S13).

On the other hand, the emergency rescue personnel arriving near the site (S14) calls the rescue requester, and transmits the password received with the rescue request (S15).

Then, the terminal checks whether the password received from the rescue personnel matches the password sent by the rescuer (S16), and if the passwords match (S17), flashes the flash (S18) and the emergency rescue personnel tracks the location. (S19).

In other words, the password sent during the rescue request is for the rescue personnel to arrive in the vicinity of the site and to remotely flash the flash, so that the location of the rescue requester can be quickly found while minimizing battery consumption.

As described above, the apparatus and method for transmitting an emergency rescue signal using the mobile terminal of the present invention causes the terminal to emit a flash so that emergency personnel can locate and rescue the caller who requested the emergency rescue at a faster time. It has the effect of making it possible.

Claims (4)

A keypad having a rescue request button; A mobile communication terminal provided with an RF module and a modem unit connected to an antenna, wherein the power supply unit is connected to an arbitrary port of the modem unit and supplies power to a flash, and a predetermined time interval is provided by a charging circuit by a capacitor and a relay. Mobile communication comprising a flashing control unit for controlling the power applied to the power supply on / off to flash the flash and a charge detector for turning on the power supply by detecting whether the flashing control unit charging the capacitor Emergency rescue signal transmission device using a terminal. According to claim 1, wherein the flashing control unit is applied to the power supply voltage (VCC) to the closed contact, the open contact is connected to the power supply and the switch contact for switching the open contact and the closed contact comprises a relay which is grounded through a capacitor Emergency rescue signal transmission apparatus using a mobile communication terminal, characterized in that. According to claim 1 or 2, wherein the charge detector is applied to the inverting terminal (-) a reference voltage, the non-inverting terminal (+) is applied to the capacitor charge voltage of the flashing control unit, the charge voltage is higher than the reference voltage If large, the emergency rescue signal transmission apparatus using a mobile communication terminal, characterized in that configured as a comparator for outputting the relay turn-on signal and the charging completion signal of the control unit to the modem unit. A first step of transmitting a password for remotely controlling flash emission to an emergency rescue center when requesting an emergency rescue using a mobile communication terminal; A second step of transmitting a password received with the rescue request to a terminal of the rescue requester after the rescue personnel dispatched from the emergency rescue center receiving the rescue request signal arrive at an approximate location of the rescue requester; A third step of determining whether the terminal receiving the password from the rescue agent matches the password sent by the terminal; And a fourth step of causing the rescue personnel to track the correct position by flashing the flash when the passwords match, as a result of the determination.