KR100532291B1 - Alarming method to prevent loss of mobile phone - Google Patents

Abstract

The present invention relates to a method for preventing the loss of a mobile phone in a mobile phone having a remote device.

If you put a mobile phone in a bag and leave the bag on the shelf when you are on a train or subway, or if you carry a mobile phone in your hand and put it in a certain place for a while, it will prevent your mobile phone from being inadvertently lost.

Set the main body of the mobile phone and the remote device to the chain function mode, and form a channel between the main body of the mobile phone and the remote device at regular intervals to measure the electric field strength, and when the electric field strength falls below the set level, the remote device is measured. You can prevent the phone from being lost by generating an alarm.

Description

Alarming method to prevent loss of mobile phone

The present invention relates to a method for preventing the loss of a mobile phone, and more particularly, to a method of preventing a loss of a mobile phone by generating an alarm when the received electric field strength is a predetermined level away from the remote and the main body in a mobile phone having a remote device.

In general, a mobile phone performs a call function while transmitting and receiving an RF signal alone with a base station. That is, the mobile communication telephone includes a transceiver and a signal processing unit therein, and performs a voice call function after establishing a wireless link while performing data communication with the base station. At this time, since the mobile communication phone is bulky, it is inconvenient to carry it in a pocket, so it is carried in a bag or the like. If the call occurs after putting the mobile phone in the bag, it is inconvenient to take out the mobile phone from the bag and make a phone call. To solve this problem, the remote device is provided with a bulky remote device and placed in a pocket. A mobile phone capable of making a call through is developed. However, if you put a telecommunication phone in a bag and leave the bag on the shelf when you are on a train or subway, or if you carry a mobile phone in your hand and put it in a certain place for a while, you often lose your mobile phone due to carelessness. Occurs.

Accordingly, an object of the present invention is to provide a method of preventing a loss or theft by generating an alarm when a certain distance is dropped by wireless communication between a main body and a remote device in a mobile communication telephone having a main body and a remote device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In an embodiment of the present invention, the mobile communication phone includes a main body and a remote device, the main body is a device for performing a wireless communication function with a base station in the mobile communication phone, and the remote device performs a wireless communication function with the main body. It is a device that can perform a function.

1 is a block diagram of a mobile communication telephone body according to an embodiment of the present invention.

The duplexer 313 is connected to the first antenna 312 and performs a function of separating a signal transmitted to the base station and a signal transmitted to the base station. The first RF receiver 315 inputs an RF signal output from the duplexer 313. The first RF receiver 315 performs low noise amplification, frequency down conversion, and demodulation of the received RF signal. The first RF transmitter 310 generates a transmit RF signal and outputs the RF signal to the duplexer 313. The first RF transmitter 310 inputs transmission data to modulate, frequency up conversion, and amplify a power amplifier. The frequency synthesizer 323 generates local oscillation signals for designating a transmission channel and a reception channel according to the received control data and applies them to the first RF receiver 315 and the first RF transmitter 310, respectively. The duplexer 313, the first RF receiver 315, and the first RF transmitter 310 correspond to the frequency synthesizer 323 corresponding to the first wireless communication unit 380.

The reception processor 314 decodes the reception signal output from the first RF receiver 315, applies control data to the control unit 311, and outputs the reception voice signal to the audio circuit 304 and the first switch 331. The first transmission processor 321 encodes the transmission voice signal output from the audio circuit 304 or the second switch 349 and the transmission control data output from the control unit 311 and outputs the same to the first RF transmitter 310. The reception processor 314 and the transmission processor 321 may be implemented by a digital signal processor (DSP).

The controller 311 controls overall operations of the mobile communication phone body. The controller 311 includes a memory for storing a program for controlling the overall operation of the mobile communication phone body, and a memory for temporarily storing data generated during the execution of the program. The key input unit 301 generates a key command for controlling the overall operation of the mobile communication phone and key data for dialing and outputs it to the controller 311. The display unit 302 displays the state of the mobile communication telephone under the control of the control unit 311. The buzzer 303 generates a buzzer sound indicating an incoming state under the control of the controller 311. The audio circuit 304 is connected to the transmitter 306 and the receiver 305, and simultaneously reproduces the audio signal output from the receiver 317 and outputs the signal to the receiver 305, thereby converting the voice generated from the transmitter 306 into an electrical signal and transmitting the signal 321. Output to The controller 311 activates the first control signal CTL1 when receiving an incoming call from the reception processor 314 and generates call start data, activates the second control signal CTL2 when receiving response data, and receives the first control signal CTL1 when receiving call termination data. And deactivate the second control signal CTL2.

The first switch 331 is connected to the reception processor 314 and is turned on when the first control signal CTL1 is activated to form a path between the reception processor 317 and the modulator 333. The first switch 331 performs a function of blocking a second wireless transmission path formed between the main body and the remote device when the main body is used alone without using the remote device. To this end, the control unit 311 activates the first control signal CTL1 to turn off the first switch 331 when the key input unit 301 receives the unused command data of the remote device. As a result, the first switch 331 is turned off to receive the main body. The connection between the processor 314 and the second RF transmitter 391 is blocked. Here, when determining whether to use the remote device and the main body by default without setting the use of the remote device, the first switch 331 may be removed. In this case, the output of the reception processor 314 is configured to be directly input to the modulator 333.

The PLL 351 inputs control data output from the control unit 311, and generates a PLL control signal for generating the same frequency as the reception band frequency of the RF receiver of the remote device and the same frequency as the transmission band frequency of the RF transmitter. Generates a PLL control signal to generate. The TxVCO 353 generates the reception band frequency of the remote device by the output of the PLL 351. The RxVCO 355 generates the transmission band frequency of the remote device by the output of the PLL351. Using the PLL351, VCO353, and 355 as described above, the main body performs a channel scan operation with the remote device to set a channel frequency for establishing an RF link. That is, the main body sets the channel having the best received signal strength among the available channels by wirelessly communicating with the remote device in the idle state.

The modulator 333 is connected to the first switch 331, modulates a signal received through the first wireless communication unit 380, and converts the modulated signal into a reception band of the remote device by a channel frequency output from the TxVCO 353. do. The modulator 333 may include an ID generator for transmitting and receiving a voice signal with a remote device. When the controller 311 generates the ID, the modulator 333 does not include the ID generator. The transmission amplifier 335 amplifies the signal output from the modulator 333 and outputs the signal to the duplexer 337. The above configuration is the configuration of the second RF transmitter 391 in which the main body outputs a radio transmission signal to the remote device.

The reception amplifier 341 amplifies the transmission signal of the remote device received through the duplexer 337. The mixer 343 mixes the output of the reception amplifier 341 and the channel frequency output to the RxVCO 355 to generate an intermediate frequency (IF). The IF detector 345 selects and outputs an intermediate frequency down-converted from the intermediate frequency output from the mixer 343. The demodulator 347 demodulates and outputs the intermediate frequency output from the IF detector 345. The demodulator 347 may include a device for determining an ID of a remote device. When the ID of the controller 311 is detected, the demodulator 347 does not include the ID detector. The second switch 349 is connected between the demodulator 347 and the transmission processor 321 and is turned on / off under the control of the controller 311 to control the formation of a transmission path of the remote device. The above configuration is the configuration of the second RF receiver 392 in which the main body receives the radio transmission signal of the remote device. In the above configuration, the second RF transmitter 391 and the second RF transmitter 392 correspond to the second wireless communication unit 390. The duplexer 337 separates radio signals transmitted and received from the remote device. The antenna 339 may be a loop pattern antenna as a built-in antenna.

2 is a block diagram of a remote device according to an embodiment of the present invention.

The antenna 411 is a built-in antenna such as the antenna 339 of the main body, and may be a loop pattern antenna. The duplexer 413 separates a radio signal transmitted and received from the main body. The controller 431 controls the overall operation of the remote device of the present invention. The controller 431 includes a program memory for storing an operation program for controlling a wireless communication function between the main body and the remote device according to the present invention, and a memory for temporarily storing data generated during the execution of the program. The key input unit 439 generates key data for setting various functions of the remote device and outputs the key data to the controller 431. The buzzer 441 generates an incoming ring or an alarm sound under the control of the controller 431. The vibrator 443 vibrates the remote device by driving a motor when the call is received under the control of the controller 431. The display unit 445 displays the state of the remote device under the control of the controller 431. The display unit 445 is composed of an LCD and an LED.

The key input unit 439 may be designed to perform a call-only or a call-calling function according to the function of the remote device. That is, when the remote device is only for incoming calls, the key input unit 439 includes a call answering key SND, a call ending key END, a power key PWR, and the like. In addition, when the remote device is the incoming / outgoing call, the key input unit 439 should be provided with function keys for setting various functions of the remote device and numeric keys for dialing. In this case, the key input unit 439 has a configuration similar to that of the key input unit 301 of the main body. At this time, the control unit 431 should be provided with a program capable of processing data of the corresponding key input unit 439 according to the call-only or call-in function.

The PLL 433 inputs control data output from the control unit 431. The PLL control signal and the transmission band frequency of the second RF transmitter for generating the same frequency as the reception band frequency of the second RF receiver of the main body by the control data. Generate a PLL control signal for generating the same frequency as. The RxVCO 437 generates the same frequency as the transmission band frequency of the second RF transmitter of the main body by the output of the PLL 433. The RXVCO437 generates a frequency equal to the reception band frequency of the second RF receiver of the remote device by the output of the PLL433. Using the PLL433, VCO435, and 437 as above, the remote device performs a channel scan function with the main body at rest and sets a channel frequency for determining a good RF link. The description of the channel scan operation between the remote device and the main body will be omitted.

The reception amplifier 415 amplifies a transmission signal of the main body received through the duplexer 413. The mixer 417 generates an intermediate frequency by mixing the output of the receiving amplifier 415 and the channel frequency output from the RXVCO435. The IF detector 419 selects and outputs an intermediate frequency down-converted from the intermediate frequency output from the mixer 417. The demodulator 421 demodulates and outputs the intermediate frequency output from the IF detector 419. The receiving audio amplifier 423 amplifies the audio signal output from the demodulator 421 and outputs the audio signal to the receiver 201. The demodulator 421 may include an ID detector for detecting an ID output from the main body, and does not include the ID detector when the controller 431 detects the ID. In the second embodiment of the present invention, it is assumed that the controller 431 detects the ID by analyzing the output of the demodulator 421. The above configuration is the RF receiver 491 configuration of the remote device.

The transmission audio amplifier 425 amplifies and outputs the transmission audio signal output from the transmitter 202. The modulator 427 modulates the transmission voice signal output from the reception audio amplifier 425, and up-converts the transmission voice signal to the transmission band of the remote device by the output frequency of the TXVCO437. The modulator 427 may include an ID generator for transmitting and receiving a voice signal with the main body. When the controller 431 generates the ID and supplies the ID to the modulator 427, the modulator 427 does not include the ID generator. In the second embodiment of the present invention, it is assumed that the modulator 427 does not have an ID generator. The transmission amplifier 429 amplifies the signal output from the modulator 427 and outputs the amplified signal to the duplexer 413. The configuration as described above constitutes an RF transmitter 492 in which a remote device outputs a radio transmission signal to the main body.

3 is a control flowchart of a mobile phone remote device for performing a chain function according to an embodiment of the present invention,

4 is a control flowchart of a mobile communication telephone body for performing a chain function according to an embodiment of the present invention.

5 is a waveform diagram of a transmission and reception period of a main body of a mobile phone and a remote device for measuring a received electric field strength when performing a chain function according to an exemplary embodiment of the present invention.

1 to 5, the operation of the preferred embodiment of the present invention will be described in detail.

In the chain function of the present invention, the mobile communication phone periodically performs communication between the remote device and the main body in a standby state without using the phone, and thus, when the received electric field strength falls below the set level by the remote device being separated by a certain distance. This function generates an alarm.

First, the control operation of the remote device for performing the chain function of the present invention will be described with reference to the flowchart of FIG. 3. In order to perform the chain function, the user presses the chain key provided in the key input unit 439 of the remote device. . In step 101, the controller 431 of the remote apparatus checks whether the chain key is pressed from the key input unit 439. If the chain key is pressed, the controller proceeds to step 102. In step 102, the control unit 431 of the remote device supplies power to the transmission / reception part of the remote device at time A of FIG. 5, and transmits the chain function request data to the main body at, for example, 2 seconds later. In step 103, the controller 431 of the remote device sets the chain function mode at time point F of FIG. 5 and turns off the power of the reception part. The controller 431 of the remote device turns off the power supplied to the transmission part at time K of FIG. 5. Then, in step 104, the control unit 431 of the remote device checks whether the chain function reception period is reached. In step 105, the control unit 431 of the remote device checks whether the chain key is pressed from the key input unit 439, and proceeds to step 106 when the chain key is pressed. In step 106, the controller 431 of the remote device releases the chain function and proceeds to step 107. In step 107, the controller 431 of the remote device supplies power to the transmission part to transmit the chain function release request data to the main body. However, if the chain key is not pressed in step 105, the controller 431 of the remote device supplies power at time point G of FIG. 5 to prepare to receive data. Then, in step 109, the control unit 431 of the remote device forms a channel when power is supplied to the receiving part, and checks whether the electric field strength falls below the set level. When the electric field strength falls below the set level, it is determined that the remote body is separated from the main body of the mobile phone by a certain distance, and the flow proceeds to step 110. In step 110, the controller 431 of the remote device drives the buzzer 441 to generate an alarm and ends the operation. However, if the electric field strength does not fall below the set level in step 109, the controller 431 of the remote device performs normal operation processing in step 111 and proceeds to step 112. In step 112, the controller 431 of the remote device turns off the power to the reception part at time H of FIG. 5 and returns to step 104. FIG. Here, the chain function receiving cycle repeats 1.6 sec off and 0.4 sec on time after starting the chain function.

In addition, when the control operation of the main body for performing the chain function of the present invention will be described with reference to Figure 4, the main body supplies power to the receiving part at time B of FIG. Thereafter, in step 201, the controller 311 of the main body checks whether the chain function request data is received at the point E of FIG. 5, and proceeds to step 202 when the chain function request data is received. In step 202, the control unit 311 of the main body sets the chain function mode at time point F of FIG. 5, and turns off the transmission / reception part. Then, in step 203, the control unit 311 of the main body checks whether the chain function transmission period is reached, and if the chain function transmission period is reached, proceeds to step 204. In step 204, the controller 311 of the main unit determines whether the chain function release request signal is received from the remote device, and if the chain function release request data is received, proceeds to step 205. In step 205, the controller 311 of the main body releases the chain function and ends the operation. However, if the chain function release request data is not received, the process proceeds to step 206 and the controller 311 of the main body supplies power to the transmission part at point I of FIG. 5 and proceeds to step 207. In step 207, the controller 311 of the main body forms a channel with the remote device. Then, in step 208, the controller 311 of the main body turns off the power of the transmission part at time J of FIG. 5 and returns to step 203 to repeat the above-described operation to perform the chain function. Here, the chain function transmission cycle repeats 1.8Sec Off and 0.2Sec OnTime. The on-time and off-time of the chain function transmission cycle and the reception cycle are different from each other in order to receive the electric field strength when the channel is formed after turning on the remote device first.

In addition, when the main body and the remote device are always powered, about 30 mA is consumed at the main body and about 20 mA at the remote device. When a lot of current flows, the use time of the battery is shortened, so the chain function transmission cycle has a ratio of on time and off time of 1: 9 and the chain function reception cycle has a ratio of on time and off time of 1: 4. The main body and the remote supply power only during the transmission and receiving cycles, so the average current consumption in the main body and the remote device flows to about 5 mA, thus increasing the battery life.

As described above, the present invention, in the mobile phone having a remote device, the power is supplied to each of the set period between the remote and the main body to measure the received electric field strength to determine that the electric field strength received from the main body is a certain distance apart when a certain level or less. It generates an alarm to prevent the loss of the mobile phone has the advantage.

1 is a block diagram of a mobile communication telephone main body according to an embodiment of the present invention;

2 is a block diagram of a remote device according to an embodiment of the present invention.

3 is a control flowchart of a mobile phone remote device for performing a chain function according to an embodiment of the present invention.

4 is a control flow diagram of a mobile communication phone body for performing a chain function according to an embodiment of the present invention.

Figure 5 is a waveform diagram of the transmission and reception period of the main body of the mobile phone and the remote device for measuring the received electric field strength when performing the chain function according to an embodiment of the present invention

Claims (4)

In the alarm method for preventing the loss of the mobile phone in a mobile phone having a remote device, Setting the main body of the mobile phone and the remote device to a chain function mode; Setting the main body of the mobile phone and the remote device in a chain mode and measuring a field strength by forming a channel between the main body of the mobile phone and the remote device at regular intervals; Alarming method for preventing the loss of the mobile phone, characterized in that made in the process of generating an alarm in the remote device when falling below the set level as a result of the electric field strength measurement. According to claim 1, The chain function mode setting process, Setting a chain function mode when the chain key is pressed on the remote device; And setting the chain function mode to transmit the chain function request data to the main body of the mobile phone, thereby setting the main body of the mobile phone to the chain function mode. In the alarm method for preventing loss in a mobile phone having a remote device, Setting a chain function mode when the chain key is pressed on the remote device; Setting the chain function mode after transmitting the chain function request data to the main body of the cellular phone after setting the chain function mode; Setting a main body and a remote device of the cellular phone in a chain mode and supplying power each time the main body of the cellular phone has a chain function transmission cycle; Setting a main body and a remote device of the cellular phone in a chain mode and supplying power each time the chain function is received by the remote device; Measuring received electric field strength at the remote device when power is supplied to the main body of the mobile phone and the remote device to form a channel; The alarm method for preventing the loss of the mobile phone, characterized in that the process of generating an alarm in the remote device when falling below the set level as a result of the received electric field strength measurement. The method of claim 3, Releasing the chain function of the remote device and transmitting the chain function release request data to the main body of the mobile phone when the chain key is pressed when the power is supplied every time the chain function reception period is received from the remote device; And a step of releasing the chain function of the cellular phone main body when the chain function release request data is received from the remote device within the chain function transmission period.