KR20050028929A - Method for specific function limitation in mobile phone - Google Patents

Abstract

A method for limiting a specific function of a mobile terminal is provided to prevent invasion of privacy of a person or illegal leakage of a security matter. A controller receives a coded value from an external connection unit in a standby mode(210,212). The controller checks whether there is a previously stored coded value(214). If there is a previously stored coded value, the controller checks whether the received coded value is identical to the previously stored coded value(216). If the two coded values are identical, the controller deletes the previously stored coded value(218), and then, recovers the released specific function(220).

Description

How to limit specific function of mobile terminal {METHOD FOR SPECIFIC FUNCTION LIMITATION IN MOBILE PHONE}

The present invention relates to a method for limiting a function of a mobile communication terminal, and more particularly, to a method for limiting a specific function of a mobile communication terminal in a public place or an area requiring security.

In recent years, mobile terminals have been developed radically, and users of mobile terminals have increased. Mobile terminal operators are providing mobile terminals with various functions to meet the needs of subscribers.

Currently, mobile communication terminals are developing into multimedia devices that can provide various additional services such as game functions, MP3 functions, and digital camera functions as well as voice calls.

The combination of digital camera functions in mobile communication terminals has opened the era of so-called 'camera phones'. The camera phone, which has been rapidly improved, can capture not only a clear image (still picture) but also a video with considerable image quality. Camera phones also have the advantage that they're almost at hand when needed. At any time in your life, you can take a picture and post it on the Internet. As a result, the issue of misuse and abuse of camera phones has already emerged as a social issue. In some cases, they may secretly photograph personal privacy or illegally disclose trade secrets. Some domestic companies prohibit camera phones from being secured in secure areas to prevent confidential documents from leaking through camera phones.

In order to prevent such misuse and abuse of the camera phone, a method of mandating the manufacturer to make a beep or emit light when taking a picture with the camera phone and a method of prohibiting the use of the camera phone in a specific place such as a public bath are considered. . Currently, when you take a picture in the vibration mode or silent mode, there is no sound so that the other party can not know whether to shoot.

Accordingly, an object of the present invention is to provide a method for restricting a specific function of a mobile communication terminal in a public place or an area requiring security.

In order to achieve the above object, the present invention provides a method of restricting a specific function of a mobile communication terminal by receiving a value obtained by encrypting a unique number of a mobile communication terminal from an external computer, and inputting an encryption value from an external computer through an external connection unit. Receiving, and determining whether there is a pre-stored encryption value, and if there is no pre-stored encryption value, storing the input encryption value to release a specific function.

In addition, in a method of limiting a specific function of a mobile communication terminal by receiving an overhead message in which a specific field is set, determining whether an overhead message has been received, and receiving the received overhead message when the overhead message is received. Analyzing, determining whether a specific field value of the overhead message is set, and canceling a specific function when the specific field value of the overhead message is set.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that reference numerals and like elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted when it is determined that the detailed description may unnecessarily obscure the subject matter of the present invention.

1 is an internal block diagram of a general mobile communication terminal to which the present invention is applied.

Referring to FIG. 1, a control unit (MPU: Micro-processor unit) 100 controls the overall operation of a mobile communication terminal. In particular, the embodiment of the present invention controls the operation of releasing a specific function or restoring the released specific function by receiving an encryption value from an external computer.

The ROM 102 may store microcode and reference data of a program for processing and controlling the controller 100. Random Access Memory (RAM) 104 stores temporary data generated during execution of various programs. Flash memory 106 stores a phone book. In particular, embodiments of the present invention stores the encryption value from an external computer.

The keypad 108 uses a number of function keys such as 0-9 keys, menu, text transfer key, call, erase, end, *, #, and up / down keys. And key input data corresponding to a key pressed by the user to the controller 100.

The display 110 displays status information generated during the operation of the mobile communication terminal, a limited number of characters, a large amount of video and still images, and the like. The display unit 110 may use a liquid crystal display (LCD).

The codec (Coder-Decoder) 112 connected to the control unit 100, and the transmitter and receiver 116 and the receiver 114 connected to the codec 112 are voice input / output blocks used for phone calls and voice recording. to be. The codec 112 converts the PCM data provided from the controller 100 into an analog voice signal and transmits the same through the talker 116 and converts the voice signal received through the receiver 114 into PCM data. To the control unit 100.

In addition, the RF unit (Radio Frequency unit) (120) is the frequency of the radio frequency signal received via the antenna 118 is provided to the baseband processing unit 122 by lowering the frequency, the baseband signal from the baseband processing unit 122 The frequency is raised and transmitted through the antenna 118. The baseband processor 122 processes a baseband signal transmitted and received between the RF unit 120 and the controller 100. For example, in the case of transmission, channel coding and spreading of data to be transmitted are performed, and in the case of reception, the function of despreading and channel decoding of a received signal is performed. .

The external connection unit 124 is configured as an interface device for connecting to a personal computer (PC) or a notebook computer. Therefore, the controller 100 serves to transmit and receive data between the computer connected to the outside.

The mobile communication terminal having the above configuration releases a specific function by using an encryption value input from an external computer. This will be described with reference to the accompanying drawings.

2 is a flowchart illustrating an operation for limiting a specific function of a mobile communication terminal using an encryption value according to an embodiment of the present invention.

The mobile communication terminal is connected to an external computer through a data cable to receive an encryption value for limiting a specific function.

Referring to FIG. 2, first, the control unit 100 performs a standby mode in step 210, and receives an encryption value from the external connection unit 124 in step 212. In step 212, the control unit 100 receives the encryption value from the external computer through the external connection unit 124 and stores it in the flash RAM 106. The encryption value is stored in the flash RAM 106 so that the encryption value can be maintained even after the mobile communication terminal is turned off and on. The encryption value is a value obtained by encrypting an electronic serial number (ESN) or a phone number of a mobile communication terminal.

In step 214, the controller 100 determines whether a pre-stored encryption value exists. As a result of the determination, if a pre-stored encryption value exists, the process proceeds to step 216;

In step 230, the control unit 100 stores the input encryption value in the flash RAM 106. In step 232, the control unit 100 releases a specific function. For example, the specific function may be a camera function, a PC-Link function, a wireless data communication function, or the like.

In step 216, the control unit 100 determines whether the previously stored encryption value matches the input encryption value. If it is determined that the previously stored encryption value and the input encryption value match, the flow proceeds to step 218.

In step 218, the controller 100 deletes the previously stored encryption value. In step 220, the controller 100 restores the released specific function.

As described above, the mobile communication terminal is connected to an external computer through a data cable. The external computer reads and encrypts an electronic serial number (ESN) or a phone number of the mobile communication terminal while the mobile communication terminal and the external computer are connected. The value encrypted in this manner is input to the mobile communication terminal via a data cable. The mobile terminal receiving the encryption value stores the encryption value and releases a specific function. When a specific function is released, the mobile communication terminal again inputs an encryption value and matches the previously stored encryption value, and deletes the previously stored encryption value and restores the released specific function.

3 is a flowchart illustrating an operation for limiting a specific function of a mobile communication terminal using an overhead message according to an embodiment of the present invention.

Referring to FIG. 3, first, the controller 100 performs a standby mode in step 310, and determines whether an overhead message is received in step 312. If it is determined that the overhead message is received, the process proceeds to step 314.

In general, the base station and the mobile communication terminal exchanges a common air interface (CAI) message including various parameters and information at regular intervals in order to maintain a continuous communication relationship. The common air interface (CAI) is an open standard set that refers to the physical and logical characteristics of a link between a base station and a mobile communication terminal, and is an interface protocol of wireless communication. In particular, it is a standard specification of common wireless connection conditions such as frequency, communication method and connection method between voice and non-voice mobile communication terminal and base station. The overhead message is a message that the base station sends to the mobile communication terminal on the call channel to communicate the special information of the base station and system-wide information with the mobile communication terminal.

In step 314, the controller 100 analyzes the received overhead message. In step 316, the controller 100 determines whether a specific field value of the overhead message is set. If the specific field value of the overhead message is set, the process proceeds to step 318. In step 318, the control unit 100 releases a specific function.

As described above, the mobile communication terminal receives an overhead message in which a specific field is set from the base station. The mobile communication terminal determines whether a specific field value of the received overhead message is set, and if so, releases the specific function. The disabled function persists while in the area receiving overhead messages. If you leave the area where the overhead message is received, the specific field value of the overhead message is not set, so the automatically released function is restored.

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 determined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, the method for limiting a specific function of the mobile communication terminal according to the present invention may limit the specific function of the mobile communication terminal in a public place or an area requiring security. Therefore, it is possible to prevent the privacy of an individual is invaded or the security information is illegally leaked.

1 is an internal block diagram of a general mobile communication terminal to which the present invention is applied;

2 is a flowchart illustrating an operation for limiting a specific function of a mobile communication terminal using an encryption value according to an embodiment of the present invention;

3 is a flowchart illustrating an operation for limiting a specific function of a mobile communication terminal using an overhead message according to an embodiment of the present invention.

Claims (4)

In a method for restricting a specific function of the mobile communication terminal by receiving a value obtained by encrypting the unique number of the mobile communication terminal from an external computer, Receiving the encryption value from the external computer through an external connection unit; Determining whether a pre-stored encryption value exists; If the pre-stored encryption value does not exist, storing the input encryption value and releasing a specific function. The method of claim 1, further comprising: determining whether a previously stored encryption value and an input encryption value match when the previously stored encryption value exists; And recovering the released specific function by deleting the pre-stored encryption value when the pre-stored encryption value matches the input encryption value. The method of claim 1, wherein the encryption value is a value obtained by encrypting an electronic serial number (ESN) or a telephone number of a mobile communication terminal. In the method for limiting a specific function of the mobile communication terminal by receiving an overhead message in which a specific field is set, Determining whether the overhead message has been received; When the overhead message is received, analyzing the received overhead message; Determining whether a specific field value of the overhead message is set; And if a specific field value of the overhead message is set, releasing a specific function.