JP2007174132A - Mobile communication system, and communication terminal, and communication control program used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication system, wherein users can avoid leakage and illegitimate use of data even when the users lose their mobile communication terminals by missing or a theft or the like, and users can select and use a plurality of mobile communication terminals, and which can easily be realized by using existing mobile communication terminals not using subscriber IC cards. <P>SOLUTION: The mobile communication system includes a main communication terminal and sub mobile communication terminals communicable of the main communication terminal. When arrived data include an identification code of one of the sub communication terminals, the main communication terminal makes communication with the sub communication terminal to authenticate the legitimacy and thereafter transmits the arrived data to a destination included in the arrived data. When no identification code is included in the arrived data, the main communication terminal confirms that any sub communication terminal is registered as a destination and thereafter, the main communication terminal makes communication with the sub communication terminal to authenticate the legitimacy and then transmits the data to the destination sub communication terminal. The main communication terminal stores data, which are determined to be stored in the sub communication terminals of other mobile communication systems, and the data are not stored in the sub communication terminals of this mobile communication system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile communication system and a communication terminal and a communication control program used therefor, and more specifically, a main communication terminal having means for storing various data such as telephone directory data, schedule data, and e-mail data; A mobile communication system including a mobile sub-communication terminal that performs voice communication (call), e-mail transmission / reception, website browsing, data communication, etc. via the main communication terminal, and a communication terminal and communication control used therefor Regarding the program.

  In recent years, mobile phones have become more and more used by students, students and senior citizens, not to mention working people, and are becoming more and more multifunctional. Functions such as transmission / reception, website browsing, data communication, digital camera, GPS (Global Positioning System), television reception, radio reception, and the like have been built in. As more and more mobile phones with such new functions or new designs are released, one person owns a plurality of mobile phones.

  On the other hand, since various personal information such as phone numbers and email addresses of other people as well as the person is stored in the mobile phone, the mobile phone is illegally used if it is lost or stolen. In addition to being feared, personal information built in may be leaked or misused. With the recent enforcement of the Personal Information Protection Law, many people and companies have become sensitive to the leakage of personal information via mobile phones.

  Various new technologies have been proposed in consideration of such situations.

  For example, in Patent Document 1 (Japanese Patent Laid-Open No. 10-262122), there is no need to store phone book information in a mobile phone, and a “phone book” that allows a user to search for a desired phone number on the mobile phone. An “information transmission system” is disclosed. This telephone directory information transmission system uses a general telephone and a cellular phone. The general telephone has a telephone directory information registration / management means for registering and managing telephone directory information, and transmission of telephone directory information. Phone book information transmission control means to perform is provided. The mobile phone includes a call request means for making a call request to the general telephone, a telephone book information request means for transmitting a telephone book information transfer request to the general telephone, and a telephone transmitted from the general telephone. Phone book information display control means for receiving and displaying the book information is provided. By doing so, it is not necessary to store the phone book information on the mobile phone, and the phone number search on the mobile phone is enabled.

  Patent Document 2 (Japanese Patent Laid-Open No. 2002-271508) discloses a “personal information management system and method” for managing personal information stored in a mobile phone using a database in a data center. In this personal information management system and method, personal information is read from a storage means of a mobile phone connected via an interface device using an information processing device at a user's home or store, and the read personal information is transmitted to the Internet. To the data center via In the data center, the received personal information is registered and stored in a database in a predetermined format. When the information processing apparatus accesses the data center and requests personal information, the requested personal information is extracted from the database and transmitted to the information processing apparatus. The information processing apparatus writes the received personal information in the storage unit of the mobile phone. By doing so, personal information stored in the mobile phone can be managed in the database of the data center.

  Patent Document 3 (Japanese Patent Laid-Open No. 2005-191836) discloses a “phone number assignment method for a mobile phone” that allows a user who owns a plurality of mobile phones to select and use an arbitrary mobile phone. Has been. In this “cell phone number assignment method”, first, identification information of a plurality of mobile phones is transmitted to a user's own account provided in advance in a computer (server), and the identification numbers of the plurality of mobile phones are assigned to the account. sign up. Next, a telephone number given by a communication carrier registered in advance in the account is assigned to one of the identification numbers of the plurality of cellular phones thus registered. When there is a call for the telephone number, one of the mobile telephones is called with reference to the identification numbers of the plurality of mobile telephones included in the allocation information. In this way, any mobile phone can be selected and used.

Patent Document 4 (Japanese Patent Application Laid-Open No. 2005-223785) discloses a “portable terminal device” that can prevent other people from using the mobile phone as a private property when it is lost or stolen. This “portable terminal device” is a portable terminal device that is permitted to be used when a subscriber IC card for storing the subscriber's personal information is installed, and the personal information is stored when the subscriber IC card is connected. An identification unit for recognizing; and a storage unit for storing the personal information recognized by the identification unit. Further, the portable terminal device registers the personal information for identification, which is one of the personal information, in the storage means, and then attaches the subscriber IC card, and the registered personal information for identification is further stored. It can be used after confirming that it is included in the personal information stored in the subscriber IC card. By doing so, it is possible to prevent others from using the mobile phone as a personal property when it is lost or stolen.
JP-A-10-262122 JP 2002-271508 A JP 2005-191836 A JP 2005-223785 A

  Since mobile phones are carried by users on a daily basis, there is a high risk of being lost or stolen. If such a situation occurs, if the mobile phone can be connected to the mobile phone via the Internet from another mobile phone or the like, the mobile phone can be erased by remote control via the communication path. Various stored data (personal information) can be deleted. However, when the mobile phone is in a place where radio waves do not reach or when the mobile phone is turned off, erasure is impossible. In such a case, data (personal information) stored in the mobile phone is not only easily leaked, but also has a high possibility of being misused.

  In the “phone book information transmission system” of Patent Document 1 described above, it is not necessary to store the phone book information in the mobile phone, but there is a difficulty in that functions other than the phone book reference cannot be realized.

  In the “personal information management system and method” of Patent Document 2 described above, personal information stored in a mobile phone can be managed in a database in a data center, but a data center including a database is essential. Therefore, there is a drawback that the scale becomes large and its realization is not easy.

  In the above-described “Mobile phone number assignment method” in Patent Document 3, a user can arbitrarily select and use one of a plurality of mobile phones. Since (server) is necessary, there is a difficulty that its realization is not easy.

  The above-mentioned “portable terminal device” of Patent Document 4 has a drawback that it can be applied only to a type of portable terminal device that is permitted to be used when a subscriber IC card is attached.

  Further, a SIM (Subscriber Identity Module) card is known as a subscriber IC card. Since the SIM card is a card-like storage medium for storing data such as a telephone number, a cellular phone of a type using a SIM card. If so, it is possible to select and use a plurality of mobile phones without changing the contract contents with the communication carrier. However, when a SIM card is replaced from one mobile phone to another mobile phone, it takes a considerable amount of time to transfer the data in the SIM card between these two mobile phones. There is also a problem that it takes extra time.

  The present invention has been made in view of such circumstances, and the object of the present invention is to lose a portable communication terminal (for example, a mobile phone, a portable information terminal, etc.) in use due to loss or theft. In addition, it is possible to reliably avoid leakage or misuse of data (personal information) caused by the portable communication terminal and unauthorized use of the portable communication terminal itself, and without changing the contents of the contract with the communication carrier. A mobile communication system in which a plurality of portable communication terminals can be arbitrarily selected and used, and can be easily realized using an existing portable communication terminal that does not use a subscriber IC card, and a mobile communication system used therefor To provide a portable communication terminal and a communication control program.

  Other objects of the present invention which are not specified here will be apparent from the following description and the accompanying drawings.

(1) In a first aspect of the present invention, a mobile communication system is provided. This mobile communication system
Including a main communication terminal capable of communicating with the outside, and a portable sub communication terminal having a unique identification code and capable of communicating with the main communication terminal,
The main communication terminal is
An identification code registration means for registering the identification code of the sub-communication terminal;
Data storage means for storing data relating to a user of the sub communication terminal to be stored in the sub communication terminal, data transmitted from the sub communication terminal and data received by the sub communication terminal;
Investigate whether or not the registered identification code is included in incoming data, and if the identification code is included, authenticate its validity by communicating with the sub-communication terminal When calling or transmitting to a destination included in the incoming data and the identification code is not included, it is confirmed whether or not the sub communication terminal is registered as a destination, and then the sub communication An authenticating means for communicating with the terminal and authenticating its authenticity and then transmitting or transmitting to the sub-communication terminal;
Communication control means for performing communication with the destination included in the incoming data or the sub-communication terminal according to the authentication result by the authentication means,
The sub-communication terminal is
A communication control means for sending the identification code to the main communication terminal when transmitting or transmitting to a desired destination via the main communication terminal;
Display means for communicating with the main communication terminal and displaying data stored in the data storage means of the main communication terminal;
Data transmitted from the sub-communication terminal, data received by the sub-communication terminal, the data displayed by the display means, and data input on the sub-communication terminal are not stored in the sub-communication terminal It is characterized by this.

  In the mobile communication system according to the first aspect of the present invention, the portable sub-communication terminal does not store data relating to the user of the sub-communication terminal; instead, the data storage of the main communication terminal Stored in the means. When necessary, communication is performed with the main communication terminal, data is read from the data storage means and displayed on the display means. The data displayed on the display means is deleted after the display is completed, and is not stored in the sub-communication terminal. Also, data transmitted from the sub-communication terminal and data received by the sub-communication terminal are also erased after transmission or reception is completed, and are not stored in the sub-communication terminal. Similarly, data input on the sub-communication terminal is not stored in the sub-communication terminal.

  Therefore, even if the sub-communication terminal is lost due to loss, theft, etc., it is possible to reliably avoid leakage or misuse of data (personal information) caused by the sub-communication terminal and unauthorized use of the sub-communication terminal itself. .

  In addition, since the secondary communication terminal has a unique identification code, when purchasing another communication terminal and using it as a secondary communication terminal, the identification code is set for the newly purchased communication terminal. If it is registered by the identification code registering means of the main communication terminal, a newly purchased communication terminal can be used. Therefore, a plurality of portable communication terminals can be arbitrarily selected and used without changing the contract content with the communication carrier.

  Furthermore, since the data relating to the user of the sub-communication terminal is not stored in the sub-communication terminal, it is not necessary to use a subscriber IC card. Therefore, it can be easily realized using an existing portable communication terminal that does not use a subscriber IC card.

  In a preferred example of the mobile communication system according to the first aspect of the present invention, when the incoming data is a voice call from the sub-communication terminal or a voice call to the sub-communication terminal, the main communication terminal and the The three parties of the sub-communication terminal and the external source or destination are temporarily connected, and then the connection between the main communication terminal and the sub-communication terminal is released.

  In another preferable example of the mobile communication system according to the first aspect of the present invention, each of the main communication terminal and the sub communication terminal is constituted by a mobile phone.

(2) According to a second aspect of the present invention, there is provided a portable communication terminal used in the mobile communication system according to the first aspect of the present invention. This communication terminal
When it is designated by the user to send or transmit to a desired destination, the user accesses a predetermined relay communication terminal that is different from the destination, and the destination data corresponding to the destination and the communication terminal specific When the identification code is sent to the relay communication terminal and designated by the user to refer to data stored in the relay communication terminal, the relay communication terminal is accessed and the identification code Communication control means for sending to the relay communication terminal;
Display means for displaying information to the user,
When the user designates sending or sending to a desired destination, the destination is displayed on the display means,
When the user designates to refer to the data stored in the relay communication terminal, the data is displayed on the display means,
The transmitted data, the received data, the data displayed by the display means, and the data input on the communication terminal are not stored in the communication terminal.

  Since the communication terminal according to the second aspect of the present invention is configured as described above, it is used in the mobile communication system according to the first aspect of the present invention by making the relay communication terminal correspond to the main communication terminal. The sub-communication terminal can be used.

  In a preferred example of the communication terminal according to the second aspect of the present invention, the communication terminal has a configuration of a mobile phone.

(3) In the 3rd viewpoint of this invention, the communication control program used for the portable communication system of the 1st viewpoint of this invention is provided. This communication control program
Determining whether the identification code of the sub-communication terminal is included in incoming data;
Determining that the identification code of the sub-communication terminal is included in the incoming data, authenticating the sub-communication terminal and then transmitting or transmitting to a specified destination;
If it is determined that the identification code of the sub-communication terminal is not included in the incoming data, the incoming data is confirmed to be from other than the sub-communication terminal, and further authenticated to the sub-communication terminal And performing a step of calling the sub-communication terminal after performing the above.

  Since the communication control program according to the third aspect of the present invention is configured as described above, it can be used for communication control of the main communication terminal used in the mobile communication system according to the first aspect of the present invention.

  According to the mobile communication system according to the first aspect of the present invention, (a) even if a mobile communication terminal (for example, a mobile phone, a mobile information terminal, etc.) in use is lost or stolen, the mobile communication It is possible to reliably avoid leakage or misuse of data (personal information) caused by the terminal and unauthorized use of the portable communication terminal itself. (B) Multiple portable types without changing the contract contents with the communication carrier There is an effect that a communication terminal can be arbitrarily selected and used, and (c) it can be easily realized by using an existing portable communication terminal that does not use a subscriber IC card.

  According to the communication terminal according to the second aspect of the present invention and the communication control program according to the third aspect of the present invention, there is an effect that the mobile communication system according to the first aspect of the present invention can be easily realized.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

  In the embodiment described below, the main mobile phone is configured as a main communication terminal, and the mobile phone system is configured using a sub mobile phone as a sub communication terminal. However, instead of the main mobile phone, a call / communication function is provided. Other types of communication terminals such as personal computers and personal digital assistants (PDAs) can also be used. PDAs equipped with communication / call functions instead of secondary mobile phones, notebook personal computers, etc. Other types of portable communication terminals can also be used. Moreover, if a telephone call (voice communication) is unnecessary, it is possible to use a communication terminal having no call function as the main communication terminal and the sub communication terminal. In this case, it becomes a mobile communication system.

(Overall configuration of mobile phone system)
FIG. 1 is a conceptual diagram showing the overall configuration of a mobile phone system according to an embodiment of the present invention.

  This mobile phone system includes a main mobile phone 10 and two sub mobile phones 20 and 20A owned by a user A, and a mobile phone owned by a user B (hereinafter also referred to as a “partner mobile phone”) 30. Including. The secondary mobile phones 20 and 20A have the same configuration, and either one can be selectively used. In addition, the user A has one telephone number (for example, 0 × 0-1234-5678) assigned from the contracted communication carrier, and the telephone number is assigned to the main mobile phone 10. Yes. The main mobile phone 10 is set with one mail address (for example, aaa@bbb.jp). Here, it is assumed that the user A is set to use the secondary mobile phone 20.

  The primary mobile phone 10 is installed at the home of the user A, and the secondary mobile phone 20 is carried by the user A. The secondary mobile phone 20A that is not used is stored by the user A. The reason why the installation location of the main mobile phone 10 is the home of the user A is that it is convenient when changing the settings of the main mobile phone 10, and therefore even if it is not the home of the user A Good. If the main mobile phone 10 is a safe place where it is not stolen, it can be installed in any other place.

  The secondary mobile phone 20 used in this mobile phone system has the same call / communication functions as a normal mobile phone, such as a call (voice communication), e-mail transmission / reception, and website browsing. In contrast, when a call or communication is performed, the call is always made via the main mobile phone 10. That is, it is impossible to make a call directly to the mobile phone 30 of the owner B or another phone from the secondary mobile phone 20, and it is also impossible to receive a call from these phones. Also, it is impossible to send or receive an e-mail directly on the secondary mobile phone 20, and it is not possible to connect to the Internet 50 and browse a website.

  For example, when a call is made from the secondary mobile phone 20 to the mobile phone 30, the secondary mobile phone 20 and the mobile phone 30 are not directly connected via the base station 43. When a call is made from the secondary mobile phone 20 to the mobile phone 30, the telephone number (for example, 0 × 0-1234-5678) of the primary mobile phone 10 is called from the secondary mobile phone 20 via the base station 41. The mobile phone 30 is called from the mobile phone 10 via the base station 42. At this time, on the display screen of the secondary mobile phone 20 (screen formed of a liquid crystal display device), as shown in FIG. 12, the telephone number of the mobile phone 30 (for example, 090-4567-8901) as a call destination (destination). Is displayed, the user A does not notice it.

  Conversely, when a call is received from the mobile phone 30 (the same applies to other telephones) to the telephone number of the main mobile phone 10, the main mobile phone 10 is first called through the base station 42, and then the main mobile phone 10 is called. The secondary mobile phone 20 is called from the telephone 10. Also at this time, the telephone number of the mobile phone 30 is displayed as the caller on the display screen of the sub mobile phone 20, so that the user A is not aware of that.

  The same applies when an e-mail is transmitted from the secondary mobile phone 20 to a desired e-mail address. That is, first, an e-mail is transmitted from the secondary mobile phone 20 to a mail address (for example, aaa@bbb.jp) set in the main mobile phone 10, and then a destination mail address (for example, the main mobile phone 10) , Xxx@yyy.jp). However, since the e-mail address designated by the user A is displayed as the transmission destination e-mail address on the display screen of the secondary cellular phone 20, the user A is not aware of that.

  E-mail data transmitted from the secondary mobile phone 20 to the outside is stored only in the primary mobile phone 10 and is not stored in the secondary mobile phone 20. The transmission e-mail data is connected to the main mobile phone 10 and called (referenced) to the sub mobile phone 20 when necessary. The data of the outgoing e-mail called from the main mobile phone 10 is displayed on the display screen of the sub mobile phone 20 and can be browsed.

  More specifically, as shown in FIG. 15 (a), the display screen of the secondary mobile phone 20 displays buttons "Browse phone book" and "Browse email". If you click with a simple pointer (or select with the cursor and press the execute button, the same applies below), the buttons for “Browse sent mail” and “Browse received mail” are displayed. If you click the “Refer to sent mail” button with an appropriate pointer, the “List of sent mails” is displayed as shown in FIG. 15B. Select the desired sent mail from the “List of sent mails”. And click it to display the contents of the outgoing mail.

  Conversely, when an e-mail is sent from the outside to a mail address (for example, aaa@bbb.jp) set in the main mobile phone 10, the e-mail is first received by the main mobile phone 10. The e-mail is then transferred from the main mobile phone 10 to a mail address (for example, ccc@bbb.jp) set in the sub mobile phone 20. Also in this case, the sender A mail address of the e-mail is displayed on the display screen of the secondary mobile phone 20, so that the user A does not notice it.

  The e-mail received by the secondary mobile phone 20 can be browsed by the user A on the display screen of the secondary mobile phone 20, but is erased when the browsing is completed. That is, similarly to the transmission e-mail data, the reception e-mail data is stored only in the main mobile phone 10 and is not stored in the sub mobile phone 20. When the received e-mail data deleted after the browsing is browsed again, it is connected to the main mobile phone 10 and called (referenced) to the secondary mobile phone 20. The received e-mail data called from the main mobile phone 10 is displayed on the display screen of the sub mobile phone 20 and can be browsed.

  More specifically, as shown in FIG. 15 (a), the user clicks on the “mail reference” button displayed on the display screen of the secondary mobile phone 20 with an appropriate pointer, and then displays the “reference received mail” displayed. When “” is clicked, a “received mail list” is displayed as shown in FIG. Therefore, if the desired received mail is selected from the “received mail list” and clicked, the contents of the received mail can be displayed.

  The same applies when browsing the website by connecting to the Internet from the secondary mobile phone 20. When a browser is activated on the secondary mobile phone 20 and a URL (Uniform Resource Locator) of a desired website is designated, the browser first transmits the command to the main mobile phone 10. The main mobile phone 10 starts a browser in response to the command and accesses the URL of the designated website after connecting the main mobile phone 10 to the Internet, so the image information of the URL is stored in the main mobile phone 10. Sent. The main mobile phone 10 immediately transfers the image information of the URL thus transmitted to the sub mobile phone 20. In this way, an image of a desired website can be viewed on the display screen of the secondary mobile phone 20.

  The secondary mobile phone 20 does not incorporate a so-called telephone directory (phone number list). In this embodiment, the telephone directory data stored in the normal mobile phone is stored in the main mobile phone 10, and is connected to the main mobile phone 10 and called to the sub mobile phone 20 when necessary (see To do). Thus, the phone book data called from the main mobile phone 10 can be used on the display screen of the sub mobile phone 20 in the same manner as when stored in the sub mobile phone 20.

  Specifically, as shown in FIG. 14, when the “phone book reference” button displayed on the display screen of the secondary mobile phone 20 is clicked with an appropriate pointer, “phone book” is displayed on the same screen. . Therefore, if a desired telephone number is selected from the “phonebook” and clicked, the telephone number can be called. In addition, a new registration, change, deletion or the like of a telephone number, an e-mail address, or the like to the telephone directory can be performed while being displayed on the display screen of the secondary mobile phone 20.

  Since many recent mobile phones have a telephone book function and a schedule management function, schedule data is stored in the main mobile phone 10 in the same manner as the telephone number data, and the main mobile phone is used when necessary. Needless to say, the data may be read from 10.

  Voice communication (call) between the main mobile phone 10 and the sub mobile phone 20, transmission / reception of e-mail / data, data transmission / reception when browsing a website, data transmission / reception when referring to a telephone directory, etc. are performed by Internet telephone or IP (Internet Protocol). ) Performed using the same technology used on the phone. That is, it is executed by assigning a predetermined IP address to each of the main mobile phone 10 and the sub mobile phone 20 and performing data communication between both IP addresses via the Internet or a network within a communication carrier. is there.

  For example, the main mobile phone 10 and the sub mobile phone use a communication control protocol or a call control protocol such as TCP (Transmission Control Protocol) / IP or SIP (Session Initiation Protocol), which is used as standard in the Internet or the like. When a predetermined IP address is assigned to each of 20 and data such as e-mail data is transmitted / received, the data is divided into packets and transmitted / received between both IP addresses. In the case of voice communication (call), a voice signal is converted into digital data, and the data is divided into packets and transmitted / received between both IP addresses. In this way, even if no telephone number is assigned to the secondary mobile phone 20, a call and communication can be made via the main mobile phone 10.

  Referring to FIG. 1, a call and data transmission / reception (communication) between the main mobile phone 10 and the sub mobile phone 20 are performed via the base stations 41 and 43 and the Internet 50 (or a TCP / IP network not shown). It will be.

  When making a call from the secondary mobile phone 20 or sending an e-mail, etc., it is set in the secondary mobile phone 20 together with command signals corresponding to various processes such as a voice call transmission request and an e-mail transmission request. The identified identification (ID) code is sent to the main mobile phone 10 together. On the contrary, when a call is received from the outside to the main mobile phone 10 or an e-mail is sent, the incoming data to the main mobile phone 10 is transferred to the sub mobile phone 20 in the main mobile phone 10. It is determined whether or not to transfer, and when it is determined to transfer, it is transferred to the secondary mobile phone 20. By doing so, it is possible to realize functions such as a call between the secondary mobile phone 20 via the main mobile phone 10 and the outside, electronic mail transmission / reception, and the like.

  Note that the secondary mobile phone 20 also receives data input on the mobile phone 20 (for example, a telephone number or a mail address newly registered on the mobile phone 20 in the phone book referred to from the main mobile phone 10). 20 is not stored.

(Main mobile phone configuration)
Next, the hardware configuration of the main mobile phone 10 will be described with reference to FIG.

  As shown in FIG. 16, the main mobile phone 10 includes an authentication unit 10a, a data storage unit 10b, an operation / input unit 10c, a communication control unit 10d, a display unit 10e, and an identification code registration unit 10f.

  The authentication means 10a authenticates whether the telephone number, e-mail address, or command received from the outside to the main mobile phone 10 is registered in advance. In other words, the calling / sending terminal or the receiving / receiving terminal It is provided to confirm the legitimacy. For example, when the main mobile phone 10 receives a voice call, it authenticates whether the caller is the secondary mobile phone 20 or when the main mobile phone 10 receives a mail, Whether the mobile phone 20 is used or not is authenticated. These are performed by checking the consistency between the identification code of the secondary mobile phone 20, that is, the ID (Identification) code and the password set by the user A. Further, it is also determined whether or not the identification code of the secondary mobile phone 20 is included in the incoming data to the main mobile phone 10. This is for knowing whether or not the caller of the incoming data is the secondary mobile phone 20 and changing the subsequent processing according to the result.

  The data storage means 10b is composed of a non-volatile memory for storing data stored in the main mobile phone 10, for example, phone book data, schedule data, transmitted or received e-mail data, telephone conversation Various data such as history data is stored. These data are displayed on the display screen by the display means 10e as necessary. Various data stored in the data storage means 10b is stored as it is unless it is erased.

  The operation / input means 10c is used when operating the main mobile phone 10 in order to use a telephone function, a mail transmission / reception function, or the like, or when inputting data such as a telephone number or a mail address. Consists of a group of operation keys consisting of alphanumeric keys and buttons dedicated to various functions, a button-like controller that can be displaced in four directions, and the like. These are the same as those provided in a normal mobile phone.

  Since the main mobile phone 10 has a telephone function, a mail transmission / reception function, an Internet connection function, etc., these functions can be used on the main mobile phone 10, but these functions cannot be used. Can also be set. That is, the main mobile phone 10 can be set so that the telephone function, the mail transmission / reception function, and the like cannot be used. In this case, the operation / input means 10c is used only for registering, changing, erasing, etc. the identification code and password of the secondary mobile phone 20 and the secondary mobile phone 20A.

  The communication control means 10d transmits voice from the secondary mobile phone 20 to another telephone, receives voice from the secondary mobile phone 20, receives an email addressed to the secondary mobile phone 20, or sends an email from the secondary mobile phone 20, and stores data. Various communication processes necessary for a data reference command from the secondary mobile phone 20 and a web browsing command from the secondary mobile phone 20 with respect to the phone book data and e-mail data stored in the means 10b are controlled. These communication processes between the main mobile phone 10 and the outside are executed using the same technology as that used in a normal mobile phone. Various communication processes between the main mobile phone 10 and the sub mobile phone 20 are executed using the same technology as that used in Internet telephones or IP telephones. Details will be described later.

  The display means 10e is used to display necessary information such as a menu, a communication state, reference data, and the like on a screen, and is generally constituted by a liquid crystal display device.

  The identification code registration means 10f is used for registering the identification code of the secondary mobile phone 20. If the identification code of the secondary mobile phone 20 is registered, transmission / transmission from the secondary mobile phone 20 and reception / reception at the secondary mobile phone 20 are possible, but when the registration of the identification code is deleted, These functions cannot be performed. Therefore, if the secondary mobile phone 20 is lost or stolen, the registration of the identification code is deleted by using the identification code registration means 10f, so that the secondary mobile phone 20 cannot be used. It can be surely prevented. Since the secondary mobile phone 20 does not store personal information or similar data, data leakage does not occur.

  The password for user A used for authentication is also set by the identification code registration means 10f. If both the identification code and the password match at the time of authentication, the legitimacy of the transmitting / transmitting terminal or the receiving / receiving terminal is confirmed, and a desired process is executed.

(Configuration of secondary mobile phone)
Next, the hardware configuration of the secondary mobile phone 20 will be described with reference to FIG.

  As shown in FIG. 17, the secondary mobile phone 20 includes a temporary data storage means 20b, an operation / input means 20c, a communication control means 20d, and a display means 20e.

  The temporary data storage means 20b is composed of a memory for storing data temporarily stored in the secondary mobile phone 20. For example, the temporary data storage means 20b temporarily stores received e-mails or the main mobile phone 10 It is used for displaying various data read and referenced (phone number data in the telephone book, transmitted or received e-mail data, etc.) on the display screen by the display means 20e. The data stored in the temporary data storage unit 20b is erased after the e-mail is transmitted or after the received mail is browsed. This is to prevent data such as a telephone number, a mail address, and an e-mail from being stored in the secondary mobile phone 20 at all.

  The call history is also stored only in the main mobile phone 10 and is not stored in the secondary mobile phone 20. However, the call history stored in the main mobile phone 10 can be referred to at any time by the data reference function of the secondary mobile phone 20.

  The operation / input means 20c is used when operating the secondary mobile phone 20 in order to use a telephone function, a mail transmission / reception function, etc., or when inputting data such as a telephone number or a mail address. Consists of a group of operation keys consisting of alphanumeric keys and buttons dedicated to various functions, a button-like controller that can be displaced in four directions, and the like. These are the same as those provided in a normal mobile phone.

  The communication control unit 20d controls various communication processes necessary for voice communication, transmission / reception of electronic mail, data reference such as a telephone directory and electronic mail / data, and web browsing. When voice communication is performed from the secondary mobile phone 20 or an e-mail is transmitted, the identification code of the secondary mobile phone 20 is transmitted to the main mobile phone 10 together with a command to execute these processes. The identification code is used for identifying whether or not the source of the command is the secondary mobile phone 20. Various communication processes with the main mobile phone 10 are executed using the same technology as that used in Internet telephones or IP telephones. However, as will be described later, after the secondary mobile phone 20 and the external phone (for example, the destination mobile phone 30) are connected via the main mobile phone 10 and a call is possible between the two phones, The connection between the mobile phone 10 and the secondary mobile phone 20 is disconnected, and the call between the secondary mobile phone 20 and the external phone at that time is executed using the same technology as that used in a normal mobile phone. The

  The display means 20e is used to display necessary information such as a menu, a communication state, reference data, and the like on a screen, and is generally constituted by a liquid crystal display device.

  Next, each operation (process) described above will be described in more detail.

(Process when sending voice)
FIG. 2 is a sequence showing processing when a voice call is made from the secondary mobile phone 20 to the counterpart mobile phone 30, in other words, when the secondary mobile phone 20 makes a call to the counterpart mobile phone 30. FIG.

  First, a number is transmitted from the secondary mobile phone 20 to the primary mobile phone 10, that is, the secondary mobile phone 20 calls the telephone number of the primary mobile phone 10. Then, an authentication request is transmitted from the main mobile phone 10 to the sub mobile phone 20 in order to authenticate whether or not the number transmission is made from a telephone registered in advance. Then, in response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since this number transmission is from the secondary mobile phone 20, the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Therefore, the authentication response from the pre-registered secondary mobile phone 20 is included. It is judged that. As a result, a calling number request (a request to notify the telephone number of the partner mobile phone 30) is transmitted from the main mobile phone 10 to the sub mobile phone 20. Then, in response to the calling number request, a calling number response (including the telephone number of the partner mobile phone 30) is transmitted from the secondary mobile phone 20 to the main mobile phone 10.

  When the calling number response is received, the number is transmitted from the main mobile phone 10 to the partner mobile phone 30 that is found by the calling number response, and the partner mobile phone 30 is called. When the counterpart mobile phone 30 responds to the call, the main mobile phone 10 and the counterpart mobile phone 30 are connected. When the connection is completed, the main mobile phone 10 and the sub mobile phone 20 are immediately connected. Thus, since the secondary mobile phone 20 and the counterpart mobile phone 30 are connected via the main mobile phone 10, a call can be made between the secondary mobile phone 20 and the counterpart mobile phone 30.

  At this time, the destination mobile phone 30 and the main mobile phone 10, the main mobile phone 10 and the sub mobile phone 20, and the destination mobile phone 30 and the sub mobile phone 20 are connected at the same time. Connected. Since the connection between the main mobile phone 10 and the sub mobile phone 20 is unnecessary, the connection is disconnected immediately after the connection between the sub mobile phone 20 and the counterpart mobile phone 30 is confirmed. In the meantime, since the state in which the secondary mobile phone 20 and the counterpart mobile phone 30 are directly connected is maintained, the call-enabled state of the secondary mobile phone 20 and the counterpart mobile phone 30 continues.

  When a voice call is made from the secondary mobile phone 20 to the counterpart mobile phone 30, the secondary mobile phone 20 and the counterpart mobile phone 30 are connected by the operation of the primary mobile phone 10 as described above, and the secondary mobile phone 30 is connected. A telephone call can be made between the telephone set 20 and the counterpart mobile phone 30.

(Processing for incoming voice calls)
FIG. 3 shows processing when a voice call is received from the partner mobile phone 30 to the sub mobile phone 20, in other words, when a call is made from the partner mobile phone 30 to the sub mobile phone 20. It is a sequence diagram.

  First, an incoming call from the partner mobile phone 30 to the main mobile phone 10 occurs, that is, the partner mobile phone 30 calls the main mobile phone 10 instead of the secondary mobile phone 20. This is because the telephone number of the user A is assigned to the main mobile phone 10 instead of the secondary mobile phone 20.

  Then, in order to authenticate whether or not the incoming call is to the secondary mobile phone 20, in other words, whether or not the secondary mobile phone 20 is registered in the primary mobile phone 10 as a phone used by the owner A, the primary mobile phone 10 An authentication request is transmitted from the mobile phone 20 to the secondary mobile phone 20. In response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since the incoming number is addressed to the secondary mobile phone 20, it is determined that the incoming number is a voice call addressed to the secondary mobile phone 20 registered in advance.

  Therefore, the main mobile phone 10 connects the main mobile phone 10 and the counterpart mobile phone 30 in response to an incoming call from the counterpart mobile phone 30 that is the caller, and immediately calls the sub mobile phone 20. When the secondary mobile phone 20 responds to the call, the main mobile phone 10 and the counterpart mobile phone 30 are connected, and a call can be made. In this way, the secondary mobile phone 20 and the counterpart mobile phone 30 are connected via the main mobile phone 10 and a call can be made.

  At this time, the destination mobile phone 30 and the main mobile phone 10, the main mobile phone 10 and the sub mobile phone 20, and the destination mobile phone 30 and the sub mobile phone 20 are connected at the same time. Connected. Since the connection between the main mobile phone 10 and the sub mobile phone 20 is unnecessary, the connection is disconnected immediately after the connection between the sub mobile phone 20 and the counterpart mobile phone 30 is confirmed. In the meantime, since the state in which the secondary mobile phone 20 and the counterpart mobile phone 30 are directly connected is maintained, the call-enabled state of the secondary mobile phone 20 and the counterpart mobile phone 30 continues.

  When a voice call is made from the counterpart mobile phone 30 to the main mobile phone 10, the counterpart mobile phone 30 and the sub mobile phone 20 are connected by the operation of the main mobile phone 10 as described above. A call can be made between the mobile phone 30 and the secondary mobile phone 20.

(Processing of the main mobile phone when making or receiving voice calls)
At the time of voice transmission from the secondary mobile communication terminal 20 and voice reception to the secondary mobile communication terminal 20, the sequence processing as described above is executed. The operation (processing) of the main mobile phone 10 at that time is shown in FIG. This will be described with reference to FIG. 4 and 5 (a) and 5 (b) are flowcharts showing the operation (processing) of the main mobile phone 10 at the time of voice transmission / reception. This process is executed by software (program) installed in the main mobile phone 10.

  First, when an incoming voice call occurs in the main mobile phone 10 in step S1, in step S2, registration is made in the main mobile phone 10 as a mobile phone to be used in the data transmitted to the main mobile phone 10 at the time of incoming voice call. It is determined whether or not a predetermined identification code of the secondary mobile phone 20 is included. When it is determined that the identification code of the secondary mobile phone 20 is included in the data, it is determined that the incoming call is from the secondary mobile phone 20, and the process proceeds to step S3. If it is determined that the identification code of the secondary mobile phone 20 is not included in the data, it is determined that the incoming call is for the secondary mobile phone 20, and the process proceeds to step S9.

  In step S3, an authentication request is transmitted to the secondary mobile phone 20. In step S4, an authentication response transmitted from the secondary mobile phone 20 in response to the authentication request is received. In step S5, it is checked whether or not the identification response and password of the secondary mobile phone 20 are included in the authentication response. If either the correct identification code or password is not included, the process ends immediately. If both the correct identification code and password are included, it is determined that the authentication response is from the secondary mobile phone 20 registered in advance, and the process proceeds to step S6.

  In step S 6, a calling number request (a request to inform the telephone number of the partner mobile phone 30) is transmitted to the secondary mobile phone 20. In step S7, a calling number response (including the telephone number of the partner mobile phone 30) transmitted from the secondary mobile phone 20 in response to the calling number request is received. Then, in step S8, a number is transmitted to the other party mobile phone 30 identified by the calling party number response, and the other party mobile phone 30 is called. This completes the series of processes in FIG. 4, but subsequently executes the processes in steps S <b> 22 to S <b> 25 in FIG.

  That is, in step S21, when a number is transmitted to the other party mobile phone 30 determined by the calling number response (this is the same as step S8), the connection with the other party mobile phone 30 is performed in step S22. It is determined whether or not is completed. When the counterpart mobile phone 30 responds to the call, the connection between the main mobile phone 10 and the counterpart mobile phone 30 is completed. Therefore, the process proceeds to step S23, the main mobile phone 10 and the sub mobile phone 20 are connected, and the main mobile phone 10, the sub mobile phone 20, and the destination mobile phone 30 are set in a state in which communication is possible. Thereafter, in step S24, the connection between the main mobile phone 10 and the sub mobile phone 20 is released. At this time, since the secondary mobile phone 20 and the counterpart mobile phone 30 remain connected, as shown in step S25, a state in which communication is possible between the secondary mobile phone 20 and the counterpart mobile phone 30 is continued.

  Step S9 is executed when it is determined in step S2 that the authentication response does not include the identification code of the secondary mobile phone 20 (the voice incoming call is directed to the secondary mobile phone 20). Then, whether or not there is a secondary mobile phone registered in the main mobile phone 10 as the destination of the incoming voice call (in this case, whether or not the secondary mobile phone 20 is registered for use with the main mobile phone 10) ). This determination is made by checking whether or not the identification code and password of the secondary mobile phone 20 are registered (set) in the main mobile phone 10. Then, if it is determined that there is no registered secondary mobile phone, no call is made and the process is immediately terminated. This is because the destination of the incoming voice call is irrelevant to the mobile phone system of the present embodiment.

  If it is determined in step S9 that there is a secondary mobile phone registered in the main mobile phone 10 as the destination of the incoming voice call, this means that the incoming voice call is destined for the secondary mobile phone 20. The secondary mobile phone 20 is called as follows.

  That is, in step S10, an authentication request is transmitted to the secondary mobile phone 20, as in step S3. In step S11, as in step S4, an authentication response transmitted from the secondary mobile phone 20 in response to the authentication request is received. In step S12, as in step S5, it is checked whether or not the identification response and password of the secondary mobile phone 20 are included in the authentication response. If either the correct identification code or password is not included, the process ends immediately. If both the correct identification code and password are included, the mobile phone 30 is connected to the partner mobile phone 30 in step S13, and the secondary mobile phone 20 is called in step S14. This completes the series of processes shown in FIG. 4, but subsequently executes the processes of steps 22a, S24 and S25 of FIG. 5B.

  That is, when the secondary mobile phone 20 is called in step S21a (this is the same as step S14), it is determined whether or not the connection with the secondary mobile phone 20 is completed in step S22a. When the secondary mobile phone 20 responds to the call, the connection between the primary mobile phone 10 and the secondary mobile phone 20 is completed. At this time, the primary mobile phone 10, the secondary mobile phone 20, and the other party mobile phone 30 are connected. You are ready to talk. Therefore, the process proceeds to step S24, and the main mobile phone 10 and the sub mobile phone 20 are released. At this time, since the secondary mobile phone 20 and the counterpart mobile phone 30 remain connected, as shown in step S25, a state in which communication is possible between the secondary mobile phone 20 and the counterpart mobile phone 30 is continued.

(Process when sending e-mail)
FIG. 6 is a sequence diagram showing processing when an e-mail is transmitted from the secondary mobile phone 20 to the counterpart mobile phone 30.

  First, an e-mail is transmitted from the secondary mobile phone 20 to the main mobile phone 10. Then, an authentication request is transmitted from the main mobile phone 10 to the sub mobile phone 20 in order to authenticate whether or not the e-mail transmission is from a pre-registered phone. Then, in response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since this e-mail transmission is from the secondary mobile phone 20, the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Therefore, the authentication from the pre-registered secondary mobile phone 20 is included. It is determined to be a response. As a result, a calling address request (a request for notification of the e-mail address of the partner mobile phone 30) is transmitted from the main mobile phone 10 to the sub mobile phone 20. Then, in response to the calling address request, a calling address response (including the e-mail address of the partner mobile phone 30) is transmitted from the secondary mobile phone 20 to the main mobile phone 10.

  When the calling address response is received, the main mobile phone 10 transmits (transfers) the e-mail to the e-mail address found by the calling address response. Thereafter, a mail transmission completion notification is transmitted to the secondary mobile phone 20. In this way, an e-mail is transmitted from the secondary mobile phone 20 to the counterpart mobile phone 30 via the main mobile phone 10.

  When the transmission (transfer) of the electronic mail is completed, the data of the transmitted mail is deleted from the secondary mobile phone 20. On the other hand, in the main mobile phone 10, the data of the outgoing mail is stored in the data storage means 10b. When necessary, outgoing mail data stored in the main mobile phone 10 can be read out and referred to by the secondary mobile phone 20.

(Process when receiving e-mail)
FIG. 7 is a sequence diagram showing processing when receiving an e-mail transmitted from the counterpart mobile phone 30 to the e-mail address of the secondary mobile phone 20.

  First, the e-mail transmitted from the counterpart mobile phone 30 to the sub mobile phone 20 is received by the main mobile phone 10. This is because the e-mail address set in the secondary mobile phone 20 is actually assigned to the primary mobile phone 10 instead of the secondary mobile phone 20.

  Then, in order to authenticate whether or not the secondary mobile phone 20 is an e-mail to be received, in other words, whether or not the secondary mobile phone 20 is registered as a phone used by the owner A, the secondary mobile phone 20 receives the secondary email from the primary mobile phone 10. An authentication request is transmitted to the mobile phone 20. In response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since this e-mail is addressed to the secondary mobile phone 20, it is determined that the e-mail addressed to the secondary mobile phone 20 registered in advance is received.

  Therefore, the main mobile phone 10 transmits (transfers) the e-mail to the e-mail address of the sub mobile phone 20. As a result, the secondary mobile phone 20 receives the e-mail.

  When the reception of the e-mail is completed, browsing can be performed on the secondary mobile phone 20, but when the browsing ends, the data of the received mail is deleted from the secondary mobile phone 20. On the other hand, in the main mobile phone 10, the received mail data is stored in the data storage means 10b. When necessary, the received mail data stored in the main mobile phone 10 can be read and referred to by the sub mobile phone 20.

(Main mobile phone processing when sending / receiving e-mail)
The sequence processing as described above is executed when an e-mail is transmitted from the secondary mobile communication terminal 20 and when an e-mail is received by the secondary mobile communication terminal 20, and the operation of the main mobile phone 10 at that time is shown in FIG. While explaining. FIG. 8 is a flowchart showing the operation (processing) of the main mobile phone 10 at the time of e-mail transmission / reception. This process is executed by software (program) installed in the main mobile phone 10.

  First, when an e-mail arrives at the main mobile phone 10 in step S31, in step S32, it is registered in the main mobile phone 10 as a sub mobile phone to be used in the data transmitted together with the e-mail. It is determined whether or not a predetermined identification code of the secondary mobile phone 20 is included. If it is determined that the identification data of the secondary mobile phone 20 is included in the incoming data, it is determined that the received email is an email transmitted from the secondary mobile phone 20, and the process proceeds to step S33. If it is determined that the identification data of the secondary mobile phone 20 is not included in the incoming data, the email is transmitted to the secondary mobile phone 20, and the process proceeds to step S39.

  In step S33, an authentication request is transmitted to the secondary mobile phone 20. In step S34, an authentication response transmitted from the secondary mobile phone 20 in response to the authentication request is received. In step S35, it is checked whether the identification response and the password of the secondary mobile phone 20 are included in the authentication response. If either the correct identification code or password is not included, the process ends immediately. If both the correct identification code and password are included, it is determined that the authentication response is from the secondary mobile phone 20 registered in advance, and the process proceeds to step S36.

  In step S 36, an outgoing mail address request (a request to inform the electronic mail address of the counterpart mobile phone 30) is transmitted to the secondary mobile phone 20. In step S37, an outgoing mail address response (including the electronic mail address of the counterpart mobile phone 30) transmitted from the secondary mobile phone 20 in response to the outgoing mail address request is received. In step S38, an e-mail is transmitted to the e-mail address of the other party mobile phone 30 determined by the e-mail address response. This completes the series of processes in FIG.

  Step S39 is executed when it is determined in step S32 that the authentication response does not include the identification code of the secondary mobile phone 20 (the email is sent to the secondary mobile phone 20). In this step, whether or not there is a secondary mobile phone registered in the primary mobile phone 10 as the destination of the e-mail (here, the secondary mobile phone 20 is registered for use with the primary mobile phone 10). Or not). This determination is made by checking whether or not the identification code and password of the secondary mobile phone 20 are registered (set) in the main mobile phone 10. If it is determined that there is no registered secondary mobile phone, transmission is not performed, and the process is immediately terminated. This is because the destination of the e-mail is irrelevant to the mobile phone system of the present embodiment.

  If it is determined in step S39 that there is a secondary mobile phone registered in the primary mobile phone 10 as the destination of the email, this means that the email is addressed to the secondary mobile phone 20. The e-mail is transferred to the secondary mobile phone 20 as follows.

  That is, in step S40, an authentication request is transmitted to the secondary mobile phone 20, as in step S33. In step S41, as in step S34, an authentication response transmitted from the secondary mobile phone 20 in response to the authentication request is received. In step S42, as in step S35, it is checked whether or not the identification response and password of the secondary mobile phone 20 are included in the authentication response. If either the correct identification code or password is not included, the process ends immediately. If both the correct identification code and password are included, the e-mail is transferred to the secondary mobile phone 20 in step S43. This completes the series of processes in FIG.

(Process when browsing the web)
FIG. 9 is a sequence diagram showing processing when browsing a website on the Internet from the secondary mobile phone 20.

  First, a web browsing request is transmitted from the secondary mobile phone 20 to the main mobile phone 10. Then, an authentication request is transmitted from the main mobile phone 10 to the secondary mobile phone 20 in order to authenticate whether or not the web browsing request is issued from a telephone registered in advance. Then, in response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since the web browsing request is from the secondary mobile phone 20, the authentication response includes the identification code and password of the secondary mobile phone 20. Therefore, the authentication from the secondary mobile phone 20 registered in advance is included. It is determined to be a response. As a result, the browser is activated on the main mobile phone 10 to connect to the Internet, and the URL specified in the web browsing request is accessed. Then, the image information of the URL is acquired and transmitted to the main mobile phone 10. The image information of the URL received by the main mobile phone 10 is transmitted to the sub mobile phone 20 together with the web browsing response. In this way, it is possible to browse the image information of the desired URL on the secondary mobile phone 20.

  The method of browsing websites on the Internet from the main mobile phone 10 is the same as that used in conventional mobile phones.

  The transmitted image information is stored in the temporary data storage means 20b of the secondary mobile phone 20, but this storage is only performed for display on the display screen of the display means 20e. It is automatically deleted from the temporary storage means 20b.

(Process when referencing data)
FIG. 10 is a sequence diagram showing processing when referring to data in the main mobile phone 10 from the secondary mobile phone 20.

  First, a data reference request regarding desired data (for example, telephone book data) is transmitted from the secondary mobile phone 20 to the main mobile phone 10. Then, in order to authenticate whether or not the data reference request is issued from a telephone registered in advance, an authentication request is transmitted from the main mobile phone 10 to the sub mobile phone 20. Then, in response to the authentication request, an authentication response is transmitted from the secondary mobile phone 20 to the main mobile phone 10, and the content is checked by the main mobile phone 10. That is, it is checked whether or not the identification response and the password of the secondary mobile phone 20 are included in the authentication response. Since the data reference request is from the secondary mobile phone 20, the authentication response includes the identification code and password of the secondary mobile phone 20. Therefore, the authentication from the secondary mobile phone 20 registered in advance is included. It is determined to be a response. As a result, a data reference response is transmitted from the main mobile phone 10 to the sub mobile phone 20. In this way, data in the main mobile phone 10 can be referred to on the secondary mobile phone 20.

  Therefore, when the secondary mobile phone 20 designates data to be referred to and transmits a data transmission request to the main mobile phone 10, a data transmission response is transmitted from the main mobile phone 10 to the secondary mobile phone 20. Since the designated data is attached to the data transmission response, the user A can refer to the desired data on the secondary mobile phone 20.

  The data transmitted as the reference data is stored in the data temporary storage means 20b of the secondary mobile phone 20, but this storage is only performed for display on the display screen of the display means 20e, and when the reference is completed. The data is automatically deleted from the temporary data storage unit 20b after a certain time has elapsed or triggered by processing such as transmission.

(Processing of the main mobile phone at the time of data reference)
At the time of data reference, the sequence processing as described above is executed. The operation of the main mobile phone 10 at that time will be described with reference to FIG. FIG. 11 is a flowchart showing the operation (processing) of the main mobile phone 10 when referring to data. This process is executed by software installed in the main mobile phone 10.

  First, when the data reference request transmitted from the secondary mobile phone 20 is received in step S51, in step S52, the secondary mobile phone registered in the main mobile phone 10 as the mobile phone to be used during the data reference request. It is determined whether or not a predetermined identification code of the telephone 20 is included. If it is determined that the identification code of the secondary mobile phone 20 is included in the data, it is determined that the data reference request is transmitted from the secondary mobile phone 20, and the process proceeds to step S53. If it is determined that the identification code of the secondary mobile phone 20 is not included in the authentication response, the process immediately ends.

  In step S53, an authentication request is transmitted to the secondary mobile phone 20. In step S54, an authentication response transmitted from the secondary mobile phone 20 in response to the authentication request is received. In step S55, it is checked whether or not the identification response and password of the secondary mobile phone 20 are included in the authentication response. If either the correct identification code or password is not included, the process ends immediately. If both the correct identification code and password are included, it is determined that the authentication response is from the secondary mobile phone 20 registered in advance, and the process proceeds to step S56.

  In step S56, a data reference response for permitting data reference is transmitted to the secondary mobile phone 20. In step S57, a data transmission request (designated data to be referred to) sent from the secondary mobile phone 20 is received. In step S58, the data designated by the data transmission request is read from the data storage means 10b and transmitted to the secondary mobile phone 20 together with the data transmission response. This completes the series of processes in FIG.

  As described above, in the mobile communication system according to the present embodiment, valuable data (personal information) such as a telephone number, an e-mail address, an address, and a schedule is stored in the main mobile phone 10 placed at the home of the user A. Therefore, even if the user A loses the secondary mobile phone 20 due to theft, theft, etc. when the user A carries it, the secondary mobile phone 20 carries it to the secondary mobile phone 20. It is possible to reliably avoid the leakage and misuse of data and unauthorized use of the secondary mobile phone 20 itself.

  Further, only by changing the registration data (identification code, password) in the main mobile phone 10 so that the sub mobile phone 20A is used instead of the sub mobile phone 20, the user A can make another sub mobile phone 20A. Can be used in a portable manner, so that a plurality of portable telephones can be arbitrarily selected and used without changing the contract content (telephone number) with the communication carrier.

  Furthermore, since the function of the subscriber IC card is not used, it can be easily realized using an existing mobile phone that does not use the subscriber IC card.

  Note that the operation (processing) when a dial-up call is made from the secondary mobile phone 20 to the predetermined telephone number in order to connect to the Internet 50 is the same as in the case of the voice call described above.

(Modification)
The embodiments described above show examples embodying the present invention. Therefore, the present invention is not limited to these embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the main mobile phone 10 and the sub mobile phone 20 are used, but a personal computer or the like may be used as the main mobile phone 10. Further, as the secondary mobile phone 20, a portable information terminal or the like may be used.

1 is a conceptual diagram illustrating an overall configuration of a mobile phone system according to an embodiment of the present invention. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when a voice call is made from a secondary mobile phone to a counterpart mobile phone via a primary mobile phone. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when an incoming voice call is made from a partner mobile phone to a secondary mobile phone via a main mobile phone. 4 is a flowchart showing an operation (processing) of the main mobile phone 10 at the time of voice transmission / reception in the mobile phone system according to the embodiment of the present invention. FIG. 5 is a flowchart showing the operation (processing) of the main mobile phone 10 at the time of voice transmission / reception in the mobile phone system according to the embodiment of the present invention, which is a continuation of FIG. 4. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when an e-mail is transmitted from the secondary mobile phone to the counterpart mobile phone via the main mobile phone. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when receiving an e-mail transmitted from a counterpart mobile phone to a sub mobile phone via a main mobile phone. 5 is a flowchart showing an operation (processing) of a main mobile phone at the time of e-mail transmission / reception in the mobile phone system according to the embodiment of the present invention. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when browsing a website on the Internet from a secondary mobile phone via a main mobile phone. In the mobile phone system according to the embodiment of the present invention, it is a sequence diagram showing processing when referring to data in the main mobile phone from the secondary mobile phone via the main mobile phone. 5 is a flowchart showing an operation (processing) of a main mobile phone when referring to data in the mobile phone system according to the embodiment of the present invention. In the mobile phone system according to the embodiment of the present invention, it is an explanatory diagram showing an example of items displayed on the display screen of the sub mobile phone when making a voice call. In the mobile phone system according to the embodiment of the present invention, it is an explanatory diagram showing an example of items displayed on the display screen of the secondary mobile phone when an e-mail is transmitted. In the mobile phone system according to the embodiment of the present invention, it is an explanatory diagram showing an example of items displayed on the display screen of the secondary mobile phone when referring to the phone book. In the mobile phone system according to the embodiment of the present invention, it is an explanatory diagram showing an example of items displayed on the display screen of the secondary mobile phone when referring to mail. It is a functional block diagram which shows the structural example of the main mobile telephone used for the mobile telephone system which concerns on the said embodiment of this invention. It is a functional block diagram which shows the structural example of the secondary mobile telephone used for the mobile telephone system which concerns on the said embodiment of this invention.

Explanation of symbols

10 Main mobile phone 20, 20A Sub mobile phone 30 (the other party) mobile phone 41, 42, 43 Base station 50 Internet

Claims (6)

Including a main communication terminal capable of communicating with the outside, and a portable sub communication terminal having a unique identification code and capable of communicating with the main communication terminal,
The main communication terminal is
An identification code registration means for registering the identification code of the sub-communication terminal;
Data storage means for storing data relating to a user of the sub communication terminal to be stored in the sub communication terminal, data transmitted from the sub communication terminal and data received by the sub communication terminal;
Investigate whether or not the registered identification code is included in incoming data, and if the identification code is included, authenticate its validity by communicating with the sub-communication terminal When calling or transmitting to a destination included in the incoming data and the identification code is not included, it is confirmed whether or not the sub communication terminal is registered as a destination, and then the sub communication An authenticating means for communicating with the terminal and authenticating its authenticity and then transmitting or transmitting to the sub-communication terminal;
Communication control means for performing communication with the destination included in the incoming data or the sub-communication terminal according to the authentication result by the authentication means,
The sub-communication terminal is
A communication control means for sending the identification code to the main communication terminal when transmitting or transmitting to a desired destination via the main communication terminal;
Display means for communicating with the main communication terminal and displaying data stored in the data storage means of the main communication terminal;
Data transmitted from the sub-communication terminal, data received by the sub-communication terminal, the data displayed by the display means, and data input on the sub-communication terminal are not stored in the sub-communication terminal A portable communication system.   When the incoming data is from voice transmission from the sub-communication terminal or voice incoming to the sub-communication terminal, the three parties of the main communication terminal, the sub-communication terminal and an external source or destination are The mobile communication system according to claim 1, wherein the mobile communication system is temporarily connected and then the connection between the main communication terminal and the sub communication terminal is released.   The mobile communication system according to claim 1 or 2, wherein each of the main communication terminal and the sub communication terminal is configured by a mobile phone. When it is designated by the user to send or transmit to a desired destination, the user accesses a predetermined relay communication terminal that is different from the destination, and the destination data corresponding to the destination and the communication terminal specific When the identification code is sent to the relay communication terminal and designated by the user to refer to data stored in the relay communication terminal, the relay communication terminal is accessed and the identification code Communication control means for sending to the relay communication terminal;
Display means for displaying information to the user,
When the user designates sending or sending to a desired destination, the destination is displayed on the display means,
When the user designates to refer to the data stored in the relay communication terminal, the data is displayed on the display means,
Transmitted data, received data, the data displayed by the display means, and data input on the communication terminal are not stored in the communication terminal.   The communication terminal according to claim 4, which has a configuration of a mobile phone. It is used for the mobile communication system according to any one of claims 1 to 3,
Determining whether the identification data of the sub-communication terminal is included in the incoming data;
Determining that the identification code of the sub-communication terminal is included in the incoming data, authenticating the sub-communication terminal and then transmitting or transmitting to a specified destination;
If it is determined that the identification code of the sub-communication terminal is not included in the incoming data, the incoming data is confirmed to be from other than the sub-communication terminal, and further authenticated to the sub-communication terminal A communication control program for causing a computer to execute the step of calling the sub-communication terminal after performing the above.

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