KR20010060145A - Method for preventing lost of mobile communication terminal - Google Patents

Abstract

PURPOSE: A method for preventing loss of a mobile communication terminal is provided to control the function of the terminal by using SMS. CONSTITUTION: A controller checks whether an SMS message is received in 211. If the SMS message is received, the controller analyzes the SMS message in 213. If the SMS message is not received, the controller performs the corresponding mode in 215. The controller checks whether user data of the received SMS message are a mobile station position tracking message as the result of the analysis of the SMS message in 217. If so, the controller analyzes a control type in 221. If not, the controller performs general SMS processing in 219. The controller checks whether the control type is position data transmission("0x00") in 223.

Description

How to prevent loss of mobile communication terminal {METHOD FOR PREVENTING LOST OF MOBILE COMMUNICATION TERMINAL}

The present invention relates to a mobile communication terminal, and more particularly, to a method for tracking the location of a terminal using a short message service (SMS) when the terminal is lost.

Loss prevention methods of the mobile phone according to the prior art are as follows.

For example, a method in which a mobile phone is provided with a separate device so that when the mobile phone is separated from the user's body (the separate device) by a predetermined distance or more, the separate device possessed by the user sounds a vibration or a warning sound to be recognized by the user. There is this. As another example, a function provided by the system includes a function of controlling a screen of the mobile phone and outputting an emergency message when the mobile phone is lost (more explanation is required).

However, the first scheme has no way of recovering the mobile phone in a completely lost state, and the second scheme depends on the system load even though the screen control function and the emergency message output function cannot be operated simultaneously and are operated by the system. There is a problem.

Accordingly, an object of the present invention is to provide a method for controlling the function of a terminal using SMS.

Another object of the present invention is to provide a method of limiting all functions except for telephone reception by controlling a function of a terminal using SMS.

Still another object of the present invention is to provide a method for confirming location information of a terminal using SMS.

Another object of the present invention to provide a method for generating a specific warning sound by controlling the function of the terminal using SMS.

Still another object of the present invention is to provide a method for displaying a specific message by controlling a function of a terminal using SMS.

A method for controlling a lost mobile communication terminal using SMS for achieving the above object includes: checking whether a location tracking message is received upon receiving a short message message; determining a type of control when the location tracking message is received; If the type is the location data transmission, the process of transmitting the location data of the terminal to the base station through the GPS function, and if the control type is an automatic dial, dial the terminal that sent the short message service message to the current surrounding sound Transmitting a message, if the control type is a warning sound, generating a specific warning sound, and if the control type is a specific message display, displaying a message and a contact phone number previously stored by the user; If the control type is restricted, the process of restricting the use of all terminals except telephone reception It is characterized by including.

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

2 is a diagram illustrating a terminal control procedure for tracking the location of a terminal using SMS according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

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

Referring to FIG. 1, the controller 101 generally controls the overall operation of the mobile communication terminal, and analyzes user data when receiving an SMS message and performs a corresponding function according to the present invention. For example, when requesting a GPS function, the position of the current terminal received from the GPS receiver is transmitted to a service base station. In this case, the location of the terminal transmitted to the service base station (BS) is transmitted to the terminal from which the SMS message is transmitted through an upper network so that the user can determine the location of the terminal. On the other hand, when requesting an automatic dialing call the terminal that sent the SMS message to inform the current location of the terminal, when requesting the warning sound to generate a warning sound by controlling the ring generator 105, the display unit when requesting a specific message display Output specific display data (108), where the specific display data is a message stored in advance to be displayed on the display unit when the terminal is absent, for example, it may be its own name and contact telephone number.

The memory 102 includes a ROM for storing a program for controlling the operation of the mobile communication terminal, and a RAM for temporarily storing data generated during the execution of the program. The wireless unit 103 converts the analog baseband signal into an RF signal (high frequency signal) and transmits it to a base station through a wireless channel, or converts an RF signal received through an antenna AT into an analog baseband signal. Downconversion and output to the modem 104. The modem 104 converts digital data into an analog baseband signal and outputs the signal to the radio section 103, or converts an analog signal input from the radio section 103 into digital data and converts the controller ( 104).

The ring generator 105 generates ring sounds under the control of the controller 102. In particular, when the terminal is lost according to the present invention generates a specific warning sound. The specific frequency generator 106 generates and transmits the specific frequency signal to notify its location when the terminal is lost under the control of the controller 101. The key input unit 107 is composed of key metrics including a plurality of numeric keys, and provides the controller 101 with key data generated by a key operation. The display unit 108 displays the operation state of the mobile communication terminal on the LCD under the control of the controller 101.

The present invention is based on tracking the location of the terminal when the terminal is lost.

Currently, the U.S. Federal Communications Committee (BCFC) has a service available for emergency 911 (E911) that estimates the location of all mobile stations (MS) by 67% within 125 m error by October 2001. I'm asking you to. Therefore, the IMT-2000 system (International Mobile Telecommunication) and the IS-95, which is a Code Division Multiple Access (CDMA) standard produced by TIA / EIA, also implement a reverse link function called a power up function (PUF). I'm trying to implement that service. The PUF transmits a probe at a progressively high power so that an emergency terminal may notify its location through a reverse channel so that a plurality of neighboring base stations acquire a signal from the terminal. A method of estimating the time at which a signal is transmitted from a terminal, which is a transmitting end, to each base station is a method of measuring a distance from the terminal to each base station (BS). The implementation of the PUF is specified as standard in IS-95B.

Although the location of the terminal can be tracked by the PUF scheme as described above, an embodiment of the present invention will be described as obtaining the location of the terminal using GPS. However, the present invention is not limited to acquiring the position of the terminal through the GPS, and any method of determining the position of the terminal is possible. In addition, the GPS function is assumed to be provided by each operator.

Hereinafter, an operation according to an embodiment of the present invention will be described in detail.

2 illustrates a terminal control procedure for tracking the location of a terminal using SMS according to an embodiment of the present invention.

Referring to FIG. 2, the controller 101 first checks whether an SMS message is received in step 211. In this case, when receiving the SMS message, the controller 101 proceeds to step 213 to analyze the SMS message. When the SMS message is not received, the controller 101 proceeds to step 215 to perform a corresponding mode.

In step 217, the controller 101 determines whether the user data of the received SMS message is a mobile station position tracking message (MSPTM).

Wherein the location tracking message is shown in Table 1 below.

FIELD LENGTH DESCRIPTION Teleservice ID One CMT (T1 = 4098) Language indicator One "0x01" Call back number Phone number of the device that sent the SMS Chari Filed composition of User Data is as below. Phone number 11 or 10 Phone number of the terminal M1 receiving the SMS Password 6 MSPTS password of the terminal M1 receiving the SMS (password stored by the user in the terminal) Control type One Control type for M1 terminal (see Table 2) Sub_Parameter One Used as an option depending on the type of control

In Table 1, MSPTS (Mobile Station Position Tracking Services) refers to an SMS function for tracking and estimating the location of a lost mobile phone by a personal terminal.

In addition, look at the control type (Control Type) for the terminal (M1) receiving the SMS mentioned in Table 1 as shown in Table 2 below

Control type value Description Transmitting a GPS Information 0x00 Send GPS information of phone to BS (supports GPS function serviced by each service provider) Generating a SpecifiedFrequency 0x01 Announce your location by calling on a specific frequency Calling Backon a Silent Mode 0x02 Make a call to the mobile phone that sent the SMS and send the surrounding sound so that the lost person can roughly estimate the location of the lost mobile phone. Alarm Generating Control 0x03 Control Beep Generation Phone Restriction Control 0x04 Control all phone functions by user except phone call Others (0x05-0xff) are all reserved for the future functionality

If the received user data of the SMS is a location tracking message in step 217, the controller 101 proceeds to step 221 to analyze a control type, and if the user data is not a location tracking message, the controller 101. In step 101, the mobile station 101 performs general SMS processing. After analyzing the control type in step 221, the controller 101 checks whether the control type is location data transmission (“0x00”) in step 223. When the control type is location data transmission, the controller 101 transmits the location data of the current terminal to the service base station BS according to the GPS function provided by each service provider.

On the other hand, if the control type is not location data transmission, the controller 101 proceeds to step 227 and checks whether the control type is a specific frequency transmission (“0x01”). At this time, when it is determined that the specific frequency is transmitted, the controller 101 proceeds to step 229 and transmits a specific frequency to inform its position. Here, the terminal sending the location tracking message detects the location of the lost terminal using a frequency receiver capable of receiving the specific frequency.

On the other hand, if the control type is not a specific frequency transmission, the controller 101 proceeds to step 231 and checks whether the control type is an automatic dial ("0x02"). At this time, when it is determined that the control type is the automatic dial, the controller 101 dials the terminal M2 that has sent the location tracking message without any indication on the display unit 108, and transmits audio information of the current location to the terminal. To pass. In this case, the audio information refers to surrounding sounds, and means transmitting the surrounding sounds to the counterpart terminal as it is. Here, the speaker should be off so that the person who has acquired the terminal is not aware.

On the other hand, if the control type is not an automatic dial, the controller 101 proceeds to step 235 and checks whether the control type is an alarm sound ("0x03"). In this case, when the control type is the alarm sound, the controller 101 examines the sub-parameters in the message of Table 1, and when TRUE, when there is an incoming signal or when the sub-parameters The ring generator 105 is controlled to generate a particular warning sound until the value is FALSE. In this case, the warning sound may be raised by the user.

On the other hand, if the control type is not a warning sound, the controller 101 proceeds to step 239 and checks whether the control type is a specific message display ("0x4"). In this case, when the control type indicates the specific message, the controller 101 proceeds to step 241 and examines the sub-parameters in the message of Table 1 and if true, processes the following items and if it is false, the terminal operates normally by removing all restrictions. Do it. First, the display unit 108 controls to always display the message stored in advance, except for the telephone reception, the phone number to contact with the user. For example, "Your mobile phone is missing. Please call 011-123-4567." Secondly, the use of the terminal is completely restricted except for telephone reception.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention can not only lock the lost cell phone directly to the lost cell phone, but also identify the location of the cell phone through the GPS function. In addition, you can expect a lot of effects to prevent loss by displaying a specific message on the lost mobile phone using the SMS or by generating a specific warning sound.

Claims (6)

In the method of controlling a lost mobile communication terminal using SMS, Checking the location tracking message when receiving the short message; Determining a control type at the time of the location tracking message; If the control type is location data transmission, transmitting the location data of the terminal to a base station through a GPS function. The method of claim 1, If the control type is an automatic dial, the method further comprises the step of sending a call to the terminal that has sent the short message service message and transmitting the current ambient sound. The method of claim 2, If the control type is a warning sound generation, characterized in that it further comprises the step of generating a specific warning sound. The method of claim 3, If the control type is a specific message display, further comprising displaying a message and a contact telephone number previously stored by the user. The method of claim 4, wherein If the control type is a usage restriction, further comprising the step of limiting the use of all terminals except the telephone reception. The method of claim 1, The GPS function is a function provided by each operator.