Abstract:
Disclosed are a system and a method for controlling functions of a mobile communication terminal when in a predetermined zone. The system includes a function control apparatus for requesting a function list stored in the mobile communication terminal when detecting that the mobile communication terminal has entered a predetermined zone, indicating functions to be deactivated and generating a first function control list when the function list is received from the mobile communication terminal, and transmitting the first function control list to the mobile communication terminal; and the mobile communication terminal for transmitting the function list to the function control apparatus in response to the request for the function list received from the function control apparatus, and updating the stored function list in accordance with the first function control list when the first function control list is received from the function control apparatus.

Description:
PRIORITY 
     This application claims priority to an application entitled “System And Method For Controlling Functions Of Mobile Communication Terminal” filed in the Korean Intellectual Property Office on Feb. 5, 2004 and assigned Serial No. 2004-7627, and to an application entitled “System And Method For Controlling Functions Of Mobile Communication Terminal” filed in the Korean Intellectual Property Office on Oct. 1, 2004 and assigned Serial No. 2004-78471, the contents of both which are incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a system and a method for controlling functions of a mobile communication terminal, and more particularly to a system and a method for controlling predetermined functions of a mobile communication terminal in a predetermined zone. 
     2. Description of the Related Art 
     Recently, with the rapid development of the mobile communication field, mobile communication terminals can perform various functions. For example, camera phones have emerged that can perform camera functions using cameras embedded in the mobile communication terminal, without a separate camera. With the appearance of such mobile communication terminals having camera functions as described above, inappropriate use of camera functions and data transmission in a company or a public place may give rise to inappropriate behavior or social criticism. For instance, taking a photograph of a person in a public bath using a camera phone having a camera function and transmitting the photographed image is very problematic. Another problem associated with camera phones involves preservation of confidential information of a company. Security of such confidential information can be compromised by the ability to photograph by a camera phone and transmit the photograph to an exterior location as a data file. 
     To prevent the camera function or the data transmission function from being used in a predetermined zone requiring security as described above, conventional methods prohibit a user from carrying the camera phone going into a predetermined zone. However, such conventional methods prevent the mobile communication terminal itself from being used, thereby depriving the user not only of the camera functions and the data transmission function, but also of other functions, such as a communication function, a text transmission function, address book function, planner function or alarm function. The inability to utilize the other functions causes the user to suffer an unnecessary inconvenience. 
     There exists another conventional method for restricting the functions of the mobile communication terminal in a predetermined zone which utilizes a satellite or a predetermined device. However, such a method may violate individuals&#39; private lives. 
     The conventional methods described above prevent the camera function or the data transmission function from being used in a predetermined zone by prohibiting a user from carrying a mobile communication terminal itself having these functions into the predetermined zone. Therefore, the user suffers from inconvenience of not being able to access other functions commonly provided in the mobile communication terminal. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a system and a method for controlling functions of a mobile communication terminal. 
     Another object of the present invention is to provide a system and a method for controlling functions of a mobile communication terminal in a predetermined zone. 
     In order to accomplish the aforementioned objects, according to one aspect of the present, there is provided a system for controlling functions of a mobile communication terminal, the system including a function control apparatus for requesting a function list stored in the mobile communication terminal when detecting that the mobile communication terminal has entered a predetermined zone, indicating functions to be deactivated and generating a restricted function control list when the function list is received from the mobile communication terminal, and transmitting the first function control list to the mobile communication terminal; and the mobile communication terminal for transmitting the function list to the function control apparatus in response to the request for the function list received from the function control apparatus, and updating the stored function list into the first function control list when the first function control list is received from the function control apparatus. 
     In order to accomplish the aforementioned objects, according to one aspect of the present, there is provided a method for controlling functions of a mobile communication terminal in a system including a function control apparatus for storing information of functions to be deactivated and the mobile communication terminal, the method including requesting by the function control apparatus a function list stored in the mobile communication terminal when detecting that the mobile communication terminal has entered a predetermined zone; transmitting by the mobile communication terminal the function list to the function control apparatus in response to the request for the function list received from the function control apparatus; indicating by the function control apparatus functions to be deactivated and generating a first function control list when the function list is received from the mobile communication terminal, and transmitting the first function control list to the mobile communication terminal; and updating by the mobile communication terminal the stored function list into the first function control list when the first function control list is received from function control apparatus. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a block diagram of a mobile communication terminal and an external device for deactivating predetermined functions of the mobile communication terminal in a predetermined zone according to a first embodiment of the present invention; 
         FIG. 2  is a flowchart illustrating a flow of signals for controlling functions of a mobile communication terminal when the mobile communication terminal goes into a predetermined zone according to an embodiment of the present invention; 
         FIG. 3  is a flowchart illustrating a flow of signals for controlling functions of a mobile communication terminal when the mobile communication terminal leaves a predetermined zone according to an embodiment of the present invention; and 
         FIG. 4  is a block diagram of a mobile communication terminal and an external device for deactivating predetermined functions of the mobile communication terminal in a predetermined zone according to a second embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein is omitted to avoid making the subject matter of the present invention unclear. 
     Hereinafter, a system for controlling functions of a mobile communication terminal according to a preferred embodiment of the invention in a predetermined zone requiring security will be described with reference to  FIG. 1 .  FIG. 1  is a block diagram of the mobile communication terminal and an external device for deactivating predetermined functions of the mobile communication terminal in the predetermined zone according to a preferred embodiment of the present invention. 
     The mobile communication terminal  100  includes a function limit module  116  for preventing designated functions from being used in the predetermined zone requiring security. Herein, the predetermined zone in the present invention refers to a place such as a public bath, a company necessarily requiring security, or a place in which there is a possibility of violating the private life or rights of other individuals. The function limit module  116  contained in the mobile communication terminal  100  stores a function list of all functions capable of being performed by the mobile communication terminal  100 . Further, the present invention includes a function control, i.e. restriction, apparatus  200  for preventing predetermined functions from among functions stored in the mobile communication terminal  100  from being used in the predetermined zone. Herein, the a function control apparatus  200  includes a transceiver unit capable of communicating with the mobile communication terminal  100 , in order to control the terminal  100  from outside of the mobile communication terminal  100  without physical contact with the mobile communication terminal  100 . 
     Hereinafter, an internal construction of the mobile communication terminal  100  will be described. The mobile communication terminal  100  includes a control unit  101 , a radio unit  102 , a display unit  104 , a key input unit  106 , a memory  108 , a camera module  110 , and the function limit module  116 . The control unit  101  controls a general operation of the mobile communication terminal  100 . Especially, in the present invention, when a function information request is received from the function control apparatus  200 , i.e. the external device, the control unit  101  responds to the request and transmits a function information list stored in a function information memory  112  to the function control apparatus  200  through a function information transceiver unit  114 . 
     Further, when a function list is received from the function control apparatus  200  through the function information transceiver unit  114 , the control unit  101  stores the received function list in the function information memory  112 . Herein, a method for storing the received function list updates a function list that has been already previously stored in accordance with the received function list. Then, the mobile communication terminal  100  performs a reset operation, and the control unit  101  controls only performable operations in the updated function information memory  112  to operate the mobile communication terminal  100 . 
     The radio unit  102 , which is controlled by the control unit  101 , receives a high frequency radio signal through an antenna (ANT), and down-converts the high frequency radio signal via baseband modulation. The display unit  104  displays a current state of the mobile communication terminal  100  or a change of state of program execution. The display unit  104  may employ a liquid crystal display (LCD). 
     Herein, when the function limit has been set in the predetermined zone, the present invention preferably displays a screen informing a user of the function limit set. The key input unit  106  has a key matrix structure, and includes a plurality of numeral keys and function keys for performing various functions. The key input unit  106  outputs an electric signal of key data generated by a key input of the user to the control unit  101 . The memory  108  temporarily stores a program processed by the control unit  101  or provides a stored program via the control unit  101 . The memory  108  typically includes a ROM for storing an operation program, an electrically programmable EEPROM, a RAM, or so forth. The camera module  110  is controlled by the control unit  101  to photograph a subject, outputs an image signal according to the photographing, and generates screen data for displaying the image signal. The function limit module  116  according to the present invention includes the function information memory  112 , the function information transceiver unit  114 , and an internal antenna. The function limit module  116  may be achieved by a smart chip. 
     The function information memory  112  stores the function list of all functions that can performed by the mobile communication terminal  100 . Further, the function information transceiver unit  114  receives a signal transmitted from the function control apparatus  200  and transmits a signal from the mobile communication terminal  100  to the function control apparatus  200 . 
     Meanwhile, the function control apparatus  200  includes a first function information transceiver unit  201 , a second function information transceiver unit  202 , a control unit  204 , and a memory  206 . 
     The first function information transceiver unit  201  transmits or receives data to/from the mobile communication terminal  100  that is going into or out of a predetermined zone. The second function information transceiver unit  202  transmits or receives data to/from the mobile communication terminal  100  leaving the predetermined zone. 
     When the function list is received from the mobile communication terminal  100  through the first function information transceiver unit  201 , the control unit  204  of the function control apparatus  200  indicates a function to be deactivated from among the functions of received function list, and generates and transmits a first function list to the mobile communication terminal  100 . Herein, the first function list transmitted to the mobile communication terminal  100  is preferably encrypted before being transmitted. 
     As described above, when the mobile communication terminal  100  enters or leaves the predetermined zone, the function control apparatus  200  may also transmit or receive data through the different transceiver units  201  and  202  or may transmit or receive data through one transceiver unit. 
     When the mobile communication terminal  100  enters or leaves the predetermined zone, an embodiment in which data are transmitted/received through one transceiver unit for a function control is shown in  FIG. 4 .  FIG. 4  is a block diagram of the mobile communication terminal and an external device for deactivating predetermined functions of the mobile communication terminal in a predetermined zone according to a second embodiment of the present invention. 
     In  FIG. 4 , since the mobile communication terminal  100  has the same construction as that of the mobile communication terminal  100  in  FIG. 1 . A function control apparatus  220  includes a function information transceiver unit  210 , a control unit  214  and a memory  216 . When function lists are received from the mobile communication terminal  100  through the function information transceiver unit  210 , the control unit  214  indicates a function to be deactivated from among the functions of the received function list and transmits the function list to the mobile communication terminal  100  through the function information transceiver unit  210 . Herein, the function list to be transmitted to the mobile communication terminal  100  is preferably encrypted before being transmitted. 
     Hereinafter, a flow of signals transmitted between the mobile communication terminal  100  and the function control apparatus  200  for controlling the functions of the mobile communication terminal  100  in the predetermined zone will be described with reference to  FIG. 2 . 
       FIG. 2  is a flowchart illustrating a flow of signals for controlling functions of a mobile communication terminal when the mobile terminal goes into the predetermined zone according to an embodiment of the present invention. Herein,  FIG. 2  employs the mobile communication terminal  100 , which includes the function limit module  116  shown in  FIGS. 1 and 4 , as an example. For convenience, the description provided in regard to  FIG. 2  makes reference to the function control apparatus  200  of  FIG. 1  as an example. It will be recognized that similar operation of control flow can be performed between the mobile communication terminal  100  and the function control apparatus  220  of  FIG. 4 . 
     The mobile communication terminal  100  includes the function limit module  116 , and the function limit module  116  stores the function list of every function of the mobile communication terminal. Further, the function control apparatus  200  stores a function limit list for preventing predetermined functions of the mobile communication terminal  100  from being used in the predetermined zone. For instance, the function limit list may include any or all of a camera function, a data transceiving function, etc. 
     When the function control apparatus  200  detects the mobile communication terminal  100  in step  300 , the function control apparatus  200  transmits a signal requesting function list information to the mobile communication terminal  100  in step  301 . When the signal requesting the function list information is received from the function control apparatus  200 , the mobile communication terminal  100  transmits the function list stored in the function information memory  112  thereof to the function control apparatus  200  through the function information transceiver unit  114  in step  302 . Herein, the mobile communication terminal  100  also transmits packet identifier information together with the function list. 
     Then, the function control apparatus  200  indicates a function to be deactivated in the received function list, and generates a first, i.e. restricted, function list including predetermined functions to be deactivated in step  303 . For instance, when the function list includes the camera function and the data transceiving function, the function control apparatus  200  sets the camera function and the data transceiving function as functions which cannot be used from among the function list received from the mobile communication terminal  100 . Herein, the function control apparatus  200  encrypts and transmits the function list to be transmitted to the mobile communication terminal  100 . 
     The function control apparatus  200  preferably stores in memory  206  that the mobile communication terminal  100  is a terminal that the function control apparatus  200  has transmitted the first function list of functions to be deactivated. The function control apparatus  200  transmits the generated first function list to the mobile communication terminal  100  in step  304 . When the mobile communication terminal  100  receives the first function list the function information memory  112  is updated according to the received function information in step  306 , and a reset operation is performed in step  308 . Then, the mobile communication terminal  100  allows only usable functions from among the functions in the function list stored in the function information memory  112  to be activated in step  310 . That is, as described in the above example, when the functions to be deactivated are the camera function and the data transceiving function, the camera function and the data transceiving function become unusable. 
     As described above, since the predetermined functions set to be deactivated are encrypted in the mobile communication terminal  100 , a user cannot freely activate the deactivated functions set. Further, when the user leaves the predetermined zone, the deactivation of the predetermined functions having been set upon entrance to the predetermined zone can be automatically released by the function control apparatus  200 . 
     Hereinafter, a flow of signals occurring when the user leaves the predetermined zone, transmitted between the mobile communication terminal  100  and the function control apparatus  200  for activating, i.e. restoring, the functions having been set to be deactivated in the mobile communication terminal  100 , will be described with reference to  FIG. 3 .  FIG. 3  is a flowchart illustrating a flow of signals for controlling the functions of the mobile communication terminal when the mobile communication terminal leaves the predetermined zone according to an embodiment of the present invention. 
     When the function control apparatus  200  detects the mobile communication terminal  100  in step  400 , the function control apparatus  200  transmits a signal requesting function list information to the mobile communication terminal  100  in step  402 . When the signal requesting the function list information is received from the function control apparatus  200 , the mobile communication terminal  100  transmits the function list stored in the function information memory  112  thereof to the function control apparatus  200  through the function information transceiver unit  114  in step  404 . Herein, the mobile communication terminal  100  also transmits packet identifier information together with the function list. The function control apparatus  200  first examines the packet identifier information in the transmitted data. Herein, when the mobile communication terminal  100  is a terminal having transmitted the function list that includes deactivated functions, step  408  is performed. Otherwise, the procedure ends. In step  408 , the function control apparatus  200  indicates all received function information as functions to be activated and generates a function list. Then, the function control apparatus  200  transmits the function list to the mobile communication terminal  100  in step  410 . 
     The mobile communication terminal  100  having received the function list updates the function information memory  112  according to the received function list in step  412 . That is, the mobile communication terminal  100  sets all of its functions as being available. Then, the mobile communication terminal  100  performs a reset operation in step  414 , and step  416  is performed. That is, the mobile communication terminal  100  regains control of all available functions. 
     As described above, in the present invention, when a user carrying a mobile communication terminal goes into a predetermined zone, predetermined functions of the mobile communication terminal can be deactivated through communication with an external device. In contrast, when the user leaves the predetermined zone, the functions having been deactivated through the communication with the external device are activated, so that these reactivated functions are normally operated. Therefore, the user can carry the mobile terminal regardless of place, and need not leave the mobile terminal when entering a restricted area. 
     Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims, including the full scope of equivalents thereof. For instance, an embodiment of the present invention employs a camera function and a data transceiving function as functions set to be unusable in a predetermined zone, but any functions of a mobile communication terminal can be deactivated.