JP2011077658A - Communication terminal, method and program for changing setting of the same, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal that facilitates switching of a main terminal and secondary terminal while maintaining security. <P>SOLUTION: The communication terminal transmits an authentication request that a functional restriction is to be lifted to terminals around the communication terminal, and lifts the restriction if the request is authorized. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a communication terminal that can operate in a state where functions are limited.

  In recent years, with the spread of mobile phones, the number of users who have a plurality of mobile terminals by themselves is increasing. However, in order to use a plurality of portable terminals, it is necessary to use each portable terminal while replacing one SIM card (Subscriber Identity Module Card) between the portable terminals, or to obtain a SIM card for each portable terminal. is there.

  As of August 2009, communication carriers in Japan do not provide a service for distributing a plurality of SIM cards corresponding to the same telephone number to users. Therefore, when acquiring a SIM card for each portable terminal, a plurality of subscriber numbers (telephone numbers) are provided.

  On the other hand, overseas, a service for providing a plurality of SIM cards corresponding to the same telephone number is realized. For example, using Deutsche Telekom's "MultiSIM" service, users can use the phone terminal that is closest to them when making a call. In addition, since all terminals having the same telephone number sound a ringing tone, the user only needs to answer at the terminal closest to him.

  In addition, there is also a communication carrier that provides one main SIM card and a plurality of sub SIM cards, and makes a difference in the calling / receiving function and bearer between the main SIM card and the sub SIM card. For example, in Hong Kong CSL, only a terminal set as a main terminal receives a call. In Thailand AIS, all services can be used only for the main card, and other cards can be used only for GPRS connection. Furthermore, there is a communication carrier that performs switching between a main terminal and a sub terminal by transmitting a predetermined number from a mobile terminal to a base station.

  In addition to the above, there are the following Patent Documents 1 to 3 as conventional techniques related to portable terminals.

  In the technique described in Patent Document 1, when it becomes difficult to continue communication of a certain communication terminal, communication is switched to another communication terminal sharing the same telephone number and communication is continued.

  In the technique described in Patent Document 2, priority information indicating the order of connection to a network is set in advance in an IC card, and the terminal information management apparatus 120 establishes a link of a terminal with a high priority. Thereby, a plurality of terminals having the same telephone number can be used exclusively.

  In the technique described in Patent Document 3, other mobile devices located within a predetermined range with respect to the own device are periodically detected, and the combination of the detected other mobile devices and registered in the group registration unit 18. If the combination of other mobile devices does not match, the function restriction unit 19 is activated. Thereby, even when the mobile device that the user carries with the day changes, the change can be flexibly dealt with.

JP 2002-209272 A JP 2007-243860 A JP 2008-85786 A

  In the technique described in Patent Document 1, when there is a communication terminal in a place where the user's eyes cannot reach, there is a possibility that a third party may operate the communication terminal, which is a security concern.

  In the technique described in Patent Document 2, when a user tries to use a terminal in which an IC card having a low priority is inserted, there is a possibility that the link of the terminal is not established. For this reason, when switching between the main terminal and the sub terminal, there is a case where a user is burdened with replacing an IC card or changing terminal settings.

  The technology described in Patent Document 3 restricts the functions of all mobile devices when a user misplaces one of the mobile devices in an environment where the user carries a plurality of mobile devices. This method seems to assume that all mobile devices are handled equally. That is, in the technique described in Patent Document 3, the distinction between main terminals and sub-terminals is not clearly made for each mobile device, and the functions of all mobile devices are restricted or all mobile devices are Only one of the function restrictions is assumed to be released. Therefore, it is difficult to assist the switching between the main terminal and the sub-terminal only with this technology.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a communication terminal capable of easily switching between a main terminal and a sub terminal while maintaining security. .

  The communication terminal according to the present invention transmits an authentication request to the effect that the function restriction should be released to surrounding terminals, and releases the function restriction if permitted.

  According to the communication terminal according to the present invention, the function restriction can be released only by the user bringing a communication terminal capable of performing authentication processing in response to the authentication request. By canceling the function restriction, the communication terminal can operate as a main terminal. That is, it is possible to easily switch between the main terminal and the sub terminal without performing troublesome work such as replacing the SIM card. In addition, since it is necessary for the user to bring a communication terminal that can perform authentication processing, the concern that the function restriction is released without the user's eyes being reduced is reduced, and an improvement in security can be expected.

1 is a configuration diagram of a mobile communication system 1000 according to Embodiment 1. FIG. It is a detailed functional block diagram of the communication terminal 100b. It is a figure which shows 1 operation example which the communication terminal 100a switches from a sub terminal to a main terminal. It is a figure which shows 1 operation example which the communication terminal 100a switches from a main terminal to a subterminal. It is a sequence diagram which shows an example of the procedure in which the main terminal and a subterminal switch in the mobile communication system 1000. FIG. It is a sequence diagram which shows an example of the procedure in which the main terminal and a subterminal switch in the mobile communication system 1000. It is a table | surface explaining operation | movement for every combination of a main terminal / child terminal and a main terminal / subterminal. It is a table | surface explaining operation | movement for every combination of a main terminal / child terminal and a main terminal / subterminal.

<Embodiment 1>
FIG. 1 is a configuration diagram of a mobile communication system 1000 according to Embodiment 1 of the present invention. The mobile communication system 1000 includes communication terminals 100a, 100b and 100c, and a base station 200. Since the configuration of each communication terminal is the same except for an authentication information storage unit 130 described later included in the communication terminal 100b, the communication terminal 100 is hereinafter referred to as the communication terminal 100 and the alphabetical suffixes are omitted.

  The communication terminal 100 includes a first communication unit 110 and a second communication unit 120. The first communication unit 110 is a functional unit that wirelessly communicates with the base station 200 and appropriately includes necessary configurations such as an antenna and a signal processing circuit. The second communication unit 120 is a functional unit that wirelessly communicates with other communication terminals 100 without passing through the base station 200, and appropriately includes necessary configurations such as an antenna and a signal processing circuit as with the first communication unit 110.

  The communication terminal 100b is a terminal that is a parent terminal of the communication terminals 100a and 100c, and further includes an authentication information storage unit 130 in addition to the configuration of these terminals. The authentication information storage unit 130 stores authentication information for authenticating the child terminals (communication terminals 100a and 100c).

  The base station 200 mediates communication between the communication terminals 100. Moreover, it manages whether each communication terminal 100 is operating as a main terminal or a sub terminal. The base station 200 includes a terminal setting storage unit 210. The terminal setting storage unit 210 stores information for managing whether each communication terminal 100 operates as a main terminal or a sub terminal.

  FIG. 2 is a detailed functional block diagram of the communication terminal 100b. The communication terminal 100b includes a first antenna 111, a first communication control unit 112, a second antenna 121, a second communication control unit 122, an authentication information storage unit 130, a control unit 140, a terminal setting storage unit 150, and a SIM card mounting unit 160. Is provided. The communication terminals 100a and 100c have the same configuration except that the authentication information storage unit 130 is not provided.

  The first antenna 111 is an antenna that performs wireless communication with the base station 200. The first communication control unit 112 includes a circuit that performs processing of signals transmitted and received by the first antenna 111 and the like. The first communication unit 110 is configured by the first antenna 111 and the first communication control unit 112.

  The second antenna 121 is an antenna that performs wireless communication with another communication terminal 100 without using the base station 200. The second communication control unit 122 includes a circuit that performs processing of signals transmitted and received by the second antenna 121 and the like. The second communication unit 120 is configured by the second antenna 121 and the second communication control unit 112. Examples of the communication standard used by the second communication unit 120 include Bluetooth (registered trademark) and human body communication. Other suitable near field communication standards can also be used.

  The authentication information storage unit 130 stores authentication information used when a child terminal authentication process described later is performed. The authentication information storage unit 130 can be configured by a non-volatile storage device such as a ROM (Read Only Memory).

  The control unit 140 controls the operation of the communication terminal 100. In addition, the communication terminal 100 is switched between operating as a main terminal and operating as a sub terminal. The difference between the main terminal and the sub terminal will be described later.

  The terminal setting storage unit 150 stores setting information indicating whether each communication terminal 100 is operating as a main terminal or a sub terminal. The terminal setting storage unit 150 can be configured by a writable storage device such as a RAM (Random Access Memory).

  The SIM card mounting unit 160 is a slot for mounting the SIM card of the communication terminal 100. The control unit 140 acquires information stored in the SIM card via the SIM card mounting unit 160.

  The first communication control unit 112, the second communication control unit 122, and the control unit 140 can be configured using hardware such as a circuit device that realizes these functions, or an arithmetic operation such as a CPU (Central Processing Unit). It can also be configured using software that defines the device and its operation.

  Each communication terminal 100 notifies the base station 200 whether to operate as a main terminal or a sub terminal. For example, the base station 200 is notified of the switching between the main terminal and the sub terminal by a method such as sending a call from the sub terminal to the base station 200 to a predetermined number for notifying the switching to the main terminal. Can do.

  Base station 200 stores in terminal setting storage section 210 the setting information of each communication terminal after switching (information indicating which of the main terminal and the sub terminal operates). In addition, the control unit 140 of each communication terminal 100 stores setting information indicating whether it operates as a main terminal or a sub terminal in the terminal setting storage unit 150.

  In the state shown in FIG. 1, it is assumed that communication terminals 100a and 100c operate as sub-terminals and communication terminal 100b operates as a main terminal. It is assumed that the communication terminals 100a and 100c are stationary communication terminals, and the communication terminal 100b is a portable communication terminal. A circle indicated by a dotted line in FIG. 1 indicates a range in which the second communication unit 120 can communicate.

  The configuration of each device included in the mobile communication system 1000 has been described above. Next, the difference between “main terminal / sub terminal” and “parent terminal / child terminal” in the present invention will be described.

  In the present invention, a main terminal is a communication terminal that operates in a state where there is no function restriction, and refers to a communication terminal that is mainly used by a user. On the other hand, the sub-terminal is a communication terminal in a state where function restrictions such as key operations and incoming calls are restricted. That is, the “main terminal / sub-terminal” is a classification of the communication terminal 100 depending on whether or not the function is restricted.

  In the present invention, the parent terminal is a communication terminal having an authentication function that allows a child terminal to operate as a main terminal. The child terminal is a communication terminal that can operate as a main terminal after receiving permission from the parent terminal. That is, the “parent terminal / child terminal” is a classification of the communication terminal 100 based on whether or not it has the authority to release the function restriction.

  Each communication terminal 100 can be either a main terminal or a sub terminal, but only the communication terminal 100b having a function of performing authentication using the authentication information and the authentication information can be the parent terminal.

  The difference between the “main terminal / sub terminal” and the “parent terminal / child terminal” in the present invention has been described above. Next, an operation when each device of the mobile communication system 1000 switches as a main terminal / sub-terminal will be described.

  FIG. 3 is a diagram illustrating an operation example in which the communication terminal 100a switches from the sub terminal to the main terminal. Hereinafter, each step of FIG. 3 will be described.

(1) Step 1: The parent terminal moves The user who owns the communication terminal 100b (parent terminal) moves toward the communication terminal 100a in order to use the communication terminal 100a. As a result, it is assumed that the communication terminal 100b possessed by the user has entered the communicable range of the second communication unit 120a.

(2) Step 2: Authenticate the child terminal (2.1) Authentication request The second communication unit 120a of the communication terminal 100a transmits an authentication request to the surroundings at predetermined time intervals. This authentication request is a communication signal for requesting permission to allow the communication terminal 100a to operate as a main terminal (a communication terminal having no function restriction). Since the response to the authentication request cannot be obtained until the communication terminal 100b enters the communication range of the second communication unit 120a, the control unit 140a of the communication terminal 100a replaces the communication terminal 100a with a sub terminal (communication terminal with a function restriction). To act as.

(2.2) Authentication response When the communication terminal 100b enters the communication area of the second communication unit 120a, the second communication unit 120b receives the authentication request transmitted by the communication terminal 100a. The control unit 140b executes authentication processing for the authentication request of the communication terminal 100a using the authentication information stored in the authentication information storage unit 130. The control unit 140b transmits an authentication response to the communication terminal 100a via the second communication unit 120b.

(3) Step 3: Notify the terminal setting (3.1) Notify the base station 200 After receiving the authentication response via the second communication unit 120a, the control unit 140a of the communication terminal 100a receives the communication terminal 100a. To act as the main terminal. The first communication unit 110a notifies the base station 200 that it operates as a main terminal.

(3.2) Storing setting information The base station 200 stores in the terminal setting storage unit 210 that the communication terminal 100a has been switched to the main terminal and notifies each communication terminal 100. The first communication unit 110b of the communication terminal 100b receives the notification and outputs it to the control unit 140b. Thereafter, the control unit 140b causes the communication terminal 100b to operate as a sub terminal. In addition, setting information indicating that is stored in the terminal setting storage unit 150b.

  FIG. 4 is a diagram illustrating an operation example in which the communication terminal 100a is switched from the main terminal to the sub terminal. Hereinafter, each step of FIG. 4 will be described.

(4) Step 4: The parent terminal moves The user who owns the communication terminal 100b (parent terminal) ends use of the communication terminal 100a and moves in a direction away from the communication terminal 100a. Thereby, it is assumed that the communication terminal 100b possessed by the user goes out of the communication range of the second communication unit 120a.

(5) Step 5: Transmit an authentication request (5.1) Authentication request The second communication unit 120a of the communication terminal 100a transmits an authentication request to the surroundings at predetermined time intervals even after shifting to the main terminal operation. . Since the response to the authentication request is obtained while the communication terminal 100b exists in the communication area of the second communication unit 120a, the control unit 140a of the communication terminal 100a operates the communication terminal 100a as the main terminal.

(5.2) Authentication Response When the communication terminal 100b goes out of the communication area of the second communication unit 120a, the second communication unit 120a cannot receive an authentication response from the communication terminal 100b. The control unit 140a causes the communication terminal 100a to operate as a sub terminal when the authentication response cannot be received for a predetermined number of times.

(6) Step 6: Notify the terminal setting (6.1) Notify the base station 200 When the communication terminal 100b has not received authentication requests from the communication terminal 100a for a predetermined number of times or for a predetermined time continuously, The base station 200 is notified that the communication terminal 100b is the main terminal.

(6.2) Storing setting information The base station 200 stores in the terminal setting storage unit 210 that the communication terminal 100b has been switched to the main terminal, and notifies each communication terminal 100. The first communication unit 110a of the communication terminal 100a receives the notification and outputs it to the control unit 140a. Thereafter, the control unit 140a causes the communication terminal 100a to operate as a sub terminal. In addition, setting information indicating that is stored in the terminal setting storage unit 150a.

  FIG. 5 is a sequence diagram showing an example of a procedure for switching between the main terminal and the sub terminal in the mobile communication system 1000. Here, the procedure from setting up each communication terminal 100 to completing the operation of FIG. 3 is shown. The communication terminals 100a to 100c are owned by the same user, and each SIM card stores the same subscriber information. Hereinafter, each step of FIG. 5 will be described.

(FIG. 5: Step S501)
The user performs pairing settings for each communication terminal 100. The pairing setting here refers to a process of causing the communication terminals 100 to communicate with each other via the second communication unit 120 and grouping them as communication terminals belonging to the same user. During the pairing setting process, the parent terminal (communication terminal 100b having authentication information) gives an ID for authentication processing (terminal identification information for identifying the child terminal later) to the child terminal. As this ID, for example, a manufacturing number (IMEI) assigned to each communication terminal 100 to identify the communication terminal 100 or an ID number of each SIM card may be used.

(FIG. 5: Step S502)
Each communication terminal 100 registers its own position with the base station 200.

(FIG. 5: Step S503)
The base station 200 stores in advance in the terminal setting storage unit 210 setting information indicating which communication terminal is the main terminal. Base station 200 transmits the setting to each communication terminal 100. Here, communication terminal 100b is notified that it should operate as a main terminal, and communication terminals 100a and 100c are notified that it should operate as a sub terminal.

(FIG. 5: Steps S504 to S506)
Since the communication terminal 100b has the authentication information, the lock is released. The communication terminals 100a and 100c are in a locked state. By the notification from the base station 200, the communication terminal 100b becomes a main terminal, and the communication terminals 100a and 100c become sub terminals. Note that the term “lock” means that the communication terminal 100 is function-restricted and operated as a child terminal. The communication terminal 100 that is unlocked can be the main terminal.

(FIG. 5: Steps S507 to S508)
The communication terminals 100a and 100c that are the child terminals search for the parent terminal via the second communication unit 120 at predetermined time intervals. Specifically, a response request may be transmitted via the second communication unit 120. When a response is obtained, it can be determined that the parent terminal is within the communication range of the second communication unit 120.

(FIG. 5: Step S509)
As shown in FIG. 3, it is assumed that the communication terminal 100b exists within the communication area of the second communication unit 120a. When the communication terminal 100a detects the presence of the communication terminal 100b, the communication terminal 100a transmits an authentication request to the communication terminal 100b. This authentication request is a request for permitting release of the function restriction of the communication terminal 100a. The second communication unit 120a of the communication terminal 100a includes the ID assigned from the parent terminal in step S501 in the authentication request signal.

(FIG. 5: Step S510)
Since the parent terminal does not exist in the vicinity of the communication terminal 100c, the search fails. When the search fails continuously for a predetermined number of times, the control unit 140c puts the communication terminal 100c into a locked state (a state where the function is restricted).

(FIG. 5: Step S511)
The control unit 140b of the communication terminal 100b (parent terminal) authenticates the ID received from the communication terminal 100a (child terminal) in step S509 using the authentication information held in the authentication information storage unit 130. The controller 140b can identify the child terminal using this ID and determine whether or not to permit unlocking.

(FIG. 5: Step S511: Supplement)
Most simply, a method is used in which a copy of authentication information is distributed to the child terminal in step S501, and in this step, the child terminal is authenticated based on whether or not the ID received from the child terminal matches the authentication information. be able to. Other authentication methods may be used.

(FIG. 5: Step S512)
The communication terminal 100b transmits the authentication result of step S511 to the communication terminal 100a. Here, it is assumed that an authentication response for permitting unlocking is transmitted.

(FIG. 5: Steps S513 to S515)
As a result of the above steps, the communication terminals 100a and 100b are unlocked and the communication terminal 100c is locked.

(FIG. 5: Step S516)
The communication terminal 100a (child terminal) requests the communication terminal 100b (parent terminal) to transmit subscriber information (for example, a subscriber's telephone number) stored in the SIM card. This is a process for determining whether or not the parent terminal that has transmitted the authentication response to permit unlocking belongs to the same subscriber.

(FIG. 5: Step S517)
The communication terminal 100b responds to the communication terminal 100a with the subscriber information stored in the SIM card.

(FIG. 5: Step S518)
The second communication unit 120a of the communication terminal 100a receives the subscriber information transmitted from the communication terminal 100b. The control unit 140a acquires the subscriber information stored in the SIM card via the SIM card mounting unit 160a and compares it with the subscriber information of the communication terminal 100b. If the two match, it is determined that the communication terminals 100a and 100b belong to the same subscriber, and the process proceeds to the subsequent steps. When the two do not match, the communication terminal 100a is returned to the locked state. In the following description, it is assumed that the two match.

(FIG. 5: Step S519)
The first communication unit 110a of the communication terminal 100a transmits a setting change request for operating the communication terminal 100a as a main terminal to the base station 200.

(FIG. 5: Step S520)
The base station 200 writes setting information indicating that the communication terminal 100a is the main terminal and the communication terminals 100b and 100c are sub-terminals in the terminal setting storage unit 210.

(FIG. 5: Step S521)
The base station 200 notifies each communication terminal 100 of a setting as to which of the main terminal and the sub terminal operates. In this case, the setting of the communication terminal 100a as the main terminal and the communication terminals 100b and 100c as the sub terminals is notified.

  FIG. 6 is a sequence diagram showing an example of a procedure for switching between the main terminal and the sub terminal in the mobile communication system 1000. Here, the procedure until the operation of FIG. 4 is completed is shown following the sequence described in FIG. Hereinafter, each step of FIG. 6 will be described.

(FIG. 6: Steps S601 to S603)
As a result of the operation sequence of FIG. 5, the communication terminal 100a becomes a main terminal (communication terminal without function restriction), and the communication terminals 100b and 100c become sub terminals (communication terminals with function restriction).

(FIG. 6: Steps S604 to S605)
These steps are the same as steps S507 to S508 in FIG.

(FIG. 6: Steps S606 to S607)
As shown in FIG. 4, it is assumed that the communication terminal 100b has moved out of the communication range of the second communication unit 120a. Since there is no parent terminal in the vicinity of the communication terminals 100a and 100c, the search fails. The communication terminals 100a and 100c are locked when the search for the parent terminal has failed a predetermined number of times.

(FIG. 6: Steps S608 to S610)
As a result of the above sequence, the communication terminal 100b is unlocked, and the communication terminals 100a and 100c are locked.

(FIG. 6: Step S611)
The communication terminal 100b determines that the communication terminal 100a has left when the authentication request from the communication terminal 100a does not reach the predetermined number of times or continuously for a predetermined time or more. The first communication unit 110b of the communication terminal 100b transmits a setting change request for operating the communication terminal 100b as a main terminal to the base station 200.

(FIG. 6: Step S612)
The base station 200 writes setting information indicating that the communication terminal 100b is a main terminal and the communication terminals 100a and 100c are sub-terminals in the terminal setting storage unit 210.

(FIG. 6: Step S613)
The base station 200 notifies each communication terminal 100 of a setting as to which of the main terminal and the sub terminal operates. In this case, the setting of the communication terminal 100b as the main terminal and the communication terminals 100a and 100c as the sub terminals is notified.

(FIG. 6: Steps S614 to S616)
As a result of the above sequence, the communication terminal 100b is a main terminal, and the communication terminals 100a and 100c are sub-terminals.

  As above, the procedure in which each device of the mobile communication system 1000 operates while switching between the main terminal and the sub terminal has been described. In the first embodiment, switching between the main terminal and the sub terminal may be executed based on an instruction from the base station 200, or each communication terminal 100 may independently execute based on the result of the authentication request. Also good. However, when the difference in function between the main terminal / sub terminal is made by cooperation with the base station 200 (for example, when only the main terminal receives an incoming call), the base station 200 distinguishes the main terminal / sub terminal in any case. You need to be notified.

  As described above, according to the first embodiment, the second communication unit 120 of the communication terminal 100 (child terminal) transmits an authentication request for requesting release of the lock (function restriction) to surrounding terminals. . When the parent terminal exists in the vicinity, the authentication response is transmitted from the parent terminal to the communication terminal 100 (child terminal), and the communication terminal 100 (child terminal) releases the lock. As a result, the user does not need to perform a special operation for switching between the main terminal and the sub-terminal, and simply moves to the vicinity of the communication terminal 100 with the parent terminal, and the communication terminal 100 becomes the main terminal. Since it can be switched, the operation burden is greatly reduced.

  Also, according to the first embodiment, the authentication information held by the parent terminal is used as a key for unlocking. In other words, the lock cannot be released unless the user possesses the key and moves to the vicinity of the communication terminal 100. Thereby, since the lock | rock of the communication terminal 100 can be cancelled | released only within the range which a user can visually recognize, the effect which improves security can be anticipated.

  Further, according to the first embodiment, the communication terminal 100 (child terminal) receives an authentication response to permit unlocking from the parent terminal and then requests to transmit subscriber information to the parent terminal. To do. As a result, it is possible to confirm whether or not the parent terminal is a communication terminal belonging to the same subscriber. Therefore, if an authentication response transmitted by an unauthorized communication terminal is received by mistake, the child terminal is locked. The security improvement effect can be expected.

<Embodiment 2>
In the first embodiment, the operation example in which the communication terminal 100b (parent terminal / main terminal) approaches the communication terminal 100a (sub-terminal / child terminal) and switches the roles of the main terminal and the sub-terminal has been described. In the second embodiment of the present invention, an operation for each combination of a parent terminal / child terminal and a main terminal / sub-terminal will be described.

  FIG. 7 is a table for explaining operations for each combination of a parent terminal / child terminal and a main terminal / sub-terminal. There are four types of combinations for each communication terminal 100. FIG. 7 shows the operation of each terminal when the communication terminal 100 having the role shown on the horizontal axis approaches the communication terminal 100 having the role shown on the vertical axis (enters the communication range of the second communication unit 120). Hereinafter, each combination of FIG. 7 will be described.

(1) Combination of Main Terminals In the mobile communication system 1000, it is assumed that there can be only one main terminal. Therefore, it does not exist when the main terminals approach each other. Therefore, there is no combination of “pattern A and pattern E”, “pattern A and pattern F”, “pattern B and pattern E”, and “pattern B and pattern F” in FIG.

(2) Combination of parent terminals In mobile communication system 1000, it is assumed that there can be only one parent terminal holding authentication information. Therefore, it does not exist when the parent terminals approach each other. Accordingly, there is no combination of “pattern A and pattern G”, “pattern C and pattern E”, and “pattern C and pattern G” in FIG.

(3) Combination of main / parent terminal and sub / child terminal When communication terminal 100 having the role of “main terminal and parent terminal” and communication terminal 100 having the role of “sub terminal and child terminal” approach each other, The parent terminal authenticates the child terminal. If the authentication is permitted, the child terminal releases the lock and shifts to the main terminal, and the parent terminal shifts to the sub terminal. A combination of “pattern A and pattern H” and “pattern D and pattern E” in FIG. 7 corresponds to this item.

(4) Combination of sub / parent terminal and main / child terminal When communication terminal 100 having the role of “sub terminal and parent terminal” and communication terminal 100 having the role of “main terminal and child terminal” approach each other, The parent terminal authenticates the child terminal. If authentication is permitted, the child terminal releases the lock. However, in this case, since the child terminal has the role of the main terminal from the beginning, the terminal setting is not changed. A combination of “pattern B and pattern G” and “pattern C and pattern F” in FIG. 7 corresponds to this item.

(5) Combination of sub / child terminal and main / child terminal When communication terminal 100 having the role of “sub terminal and child terminal” and communication terminal 100 having the role of “main terminal and child terminal” approach each other, authentication is performed. Since there is no parent terminal with information, it cannot be unlocked. Therefore, the terminal setting is not changed. A combination of “pattern B and pattern H” and “pattern D and pattern F” in FIG. 7 corresponds to this item.

(6) Combination of sub / parent terminal and sub / child terminal When communication terminal 100 having the role of “sub terminal and parent terminal” and communication terminal 100 having the role of “sub terminal and child terminal” approach each other, The parent terminal authenticates the child terminal. If the authentication is permitted, the child terminal releases the lock and moves to the main terminal. The parent terminal remains a sub-terminal. A combination of “pattern C and pattern H” and “pattern D and pattern G” in FIG. 7 corresponds to this item.

(7) Combination of sub / child terminal and sub / child terminal When communication terminal 100 having the role of “sub terminal and child terminal” and communication terminal 100 having the role of “sub terminal and child terminal” approach each other, authentication is performed. Since there is no parent terminal with information, it cannot be unlocked. Therefore, the terminal setting is not changed. The combination of “pattern D and pattern H” in FIG. 7 corresponds to this item.

  FIG. 8 is a table for explaining the operation for each combination of the parent terminal / child terminal and the main terminal / sub-terminal. FIG. 8 shows the operation of each terminal when the communication terminal 100 having the role shown on the horizontal axis and the communication terminal 100 having the role shown on the vertical axis are separated (out of the communication range of the second communication unit 120). Hereinafter, each combination of FIG. 8 will be described.

(1) Combination of Main Terminals Similar to FIG. 7, there is no combination of “pattern A and pattern E”, “pattern A and pattern F”, “pattern B and pattern E”, and “pattern B and pattern F”.

(2) Combination of Parent Terminals Similar to FIG. 7, there is no combination of “pattern A and pattern G”, “pattern C and pattern E”, and “pattern C and pattern G”.

(3) Combination of main / parent terminal and sub / child terminal When communication terminal 100 having the role of “main terminal and parent terminal” and communication terminal 100 having the role of “sub terminal and child terminal” are separated, The parent terminal cannot authenticate the child terminal. Therefore, the child terminal is locked. There is no change in the terminal settings of the parent terminal. A combination of “pattern A and pattern H” and “pattern D and pattern E” in FIG. 8 corresponds to this item.

(4) Combination of sub / parent terminal and main / child terminal When communication terminal 100 having the role of “sub terminal and parent terminal” and communication terminal 100 having the role of “main terminal and child terminal” are separated, The parent terminal cannot authenticate the child terminal. Therefore, the child terminal is locked. Since the child terminal is locked and the function is restricted, the process proceeds to the sub terminal. The parent terminal moves to the main terminal. A combination of “pattern B and pattern G” and “pattern C and pattern F” in FIG. 8 corresponds to this item.

(5) Combination of sub / child terminal and main / child terminal When communication terminal 100 having the role of “sub terminal and child terminal” is separated from communication terminal 100 having the role of “main terminal and child terminal”, authentication is performed. Since there is no parent terminal with information, it cannot be unlocked. Therefore, the terminal setting is not changed. A combination of “pattern B and pattern H” and “pattern D and pattern F” in FIG. 8 corresponds to this item.

(6) Combination of sub / parent terminal and sub / child terminal When communication terminal 100 having the role of “sub terminal and parent terminal” is separated from communication terminal 100 having the role of “sub terminal and child terminal”, The parent terminal cannot authenticate the child terminal. Therefore, the child terminal is locked. If no child terminal is the main terminal, the parent terminal shifts to the main terminal. A combination of “pattern C and pattern H” and “pattern D and pattern G” in FIG. 8 corresponds to this item.

(7) Combination of sub / child terminal and sub / child terminal When communication terminal 100 having the role of “sub terminal and child terminal” is separated from communication terminal 100 having the role of “sub terminal and child terminal”, authentication is performed. Since there is no parent terminal with information, it cannot be unlocked. Therefore, the terminal setting is not changed. The combination of “pattern D and pattern H” in FIG. 8 corresponds to this item.

  As described above, in the second embodiment, the operation for each combination of the parent terminal / child terminal and the main terminal / sub-terminal has been described.

<Embodiment 3>
The functions of the communication terminal 100 described in the first and second embodiments can be implemented as a program executed by an arithmetic device such as a CPU. For example, the functions of the communication terminal 100 can be realized by implementing the functions of the first communication unit 110, the second communication unit 120, and the control unit 140 as a program and causing the arithmetic device to execute the functions.

  Further, the program may be for realizing a part of the above-described functions, and the above-described functions may be combined with a program such as an OS (Operating System) already recorded in the communication terminal 100. It may be realized.

  The processing of each functional unit of the communication terminal 100 may be realized by recording the program on a computer-readable recording medium, causing the CPU to read and execute the program recorded on the recording medium.

  The “recording medium” storing the above-mentioned program means a computer-readable portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. . Furthermore, a program that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, and a server or client in that case Such a volatile memory inside a computer system as described above includes a program that holds a program for a certain period of time.

  100a, 100b, 100c: communication terminal, 111: first antenna, 112: first communication control unit, 121: second antenna, 122: second communication control unit, 130: authentication information storage unit, 140: control unit, 150 : Terminal setting storage unit, 160: SIM card mounting unit, 200: base station, 210: terminal setting storage unit, 1000: mobile communication system.

Claims (16)

A first communication unit that wirelessly communicates with a base station;
A second communication unit that wirelessly communicates with other communication terminals;
A control unit that controls whether or not to operate as a communication terminal with a limited function;
With
The second communication unit is
Send an authentication request requesting permission to release the function restriction of the communication terminal,
The controller is
A communication terminal, wherein when the second communication unit receives an authentication response to permit the release of the function restriction from another wireless terminal, the function restriction of the communication terminal is released. The second communication unit transmits the authentication request at predetermined time intervals,
The controller is
The function of the communication terminal is restricted when the second communication unit has not received the authentication response from another wireless terminal more than a predetermined number of times after releasing the function restriction of the wireless terminal. 1. The communication terminal according to 1. The first communication unit is
The communication terminal according to claim 1 or 2, wherein a signal notifying that the function restriction of the communication terminal is released or that the function is restricted is transmitted to the base station. The second communication unit is
The communication terminal according to any one of claims 1 to 3, wherein terminal identification information for identifying the communication terminal is included in the authentication request and transmitted.   The communication terminal according to any one of claims 1 to 4, wherein the second communication unit performs human body communication.   The communication terminal according to any one of claims 1 to 4, wherein the second communication unit performs Bluetooth communication. A storage medium for storing subscriber information of the communication terminal;
The second communication unit is
Requesting the communication terminal that sent the authentication response to send subscriber information of the communication terminal;
The controller is
When the second communication unit receives the authentication response and the subscriber information received from the communication terminal that transmitted the authentication response matches the subscriber information of the communication terminal, the function restriction of the communication terminal is released. The communication terminal according to any one of claims 1 to 6, wherein:   8. The communication terminal according to claim 7, wherein a telephone number of a subscriber is used as the subscriber information. The controller is
The function of the communication terminal is limited when the subscriber information received from the other communication terminal by the second communication unit does not match the subscriber information of the communication terminal. The communication terminal described. The first communication unit is
When the subscriber information received by the second communication unit from another communication terminal does not match the subscriber information of the communication terminal, a signal notifying that the second communication unit operates with a limited function is transmitted to the base station. The communication terminal according to claim 9. An authentication information storage unit for storing authentication information used to determine whether to permit the authentication request;
The communication terminal according to claim 1, wherein the control unit includes: determining whether to permit the authentication request using the authentication information. The base station;
The communication terminal according to any one of claims 1 to 10,
A communication terminal according to claim 11,
A mobile communication system characterized by comprising: The base station
13. The mobile communication system according to claim 12, wherein when a signal indicating that the function restriction of the communication terminal is released or a function restriction is received, the other communication terminal is notified of the fact. A first communication unit that wirelessly communicates with a base station;
A second communication unit that wirelessly communicates with other communication terminals;
A control unit that controls whether or not to operate as a communication terminal with a limited function;
To change the function setting of a communication terminal equipped with
Transmitting an authentication request requesting permission to release the function restriction of the communication terminal;
Receiving an authentication response to the authentication request;
A step of releasing the function restriction of the communication terminal when receiving an authentication response to permit the release of the function restriction from another wireless terminal;
A communication terminal setting changing method characterized by comprising:   A communication terminal setting change program that causes a control device included in the communication terminal to execute the communication terminal setting change method according to claim 14.   A storage medium storing the communication terminal setting change program according to claim 15.

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