Abstract:
An integrated circuit card memory rewriting system comprises an integrated circuit card with built-in memory and a wireless terminal having an interface for being electrically connectable with the integrated circuit card. A base station is called by the wireless terminal while the integrated circuit card is being electrically connected to the interface of the wireless terminal. Data relating to internal data stored in the integrated circuit card is requested from the base station. The wireless terminal then updates the data of the memory of the integrated circuit card connected to the interface using received signals transmitted from the base station.

Description:
RELATED APPLICATON 
   This application is a divisional application Ser. No. 09/108,345, filed on Jun. 30, 1998, now abandoned, the disclosure of which is incorporated by reference herein. 

   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a portable terminal such as a two-way pager. 
   2. Description of Related Art 
   Electronic money systems employing Integrated Circuit (IC) cards have been considered. These IC cards have a memory built-in for storing data of a balance (a limited amount that can be paid-out using this IC card) in this IC card. If payments are then made using this IC card, the balance can be reduced just by the amount of this payment. Further, if a certain amount of a deposit in one&#39;s personal account in a financial institution such as a bank is withdrawn and the data of the amount is transferred to an IC card, the balance for the amount that can be paid out using the IC card can be increased and the data within the IC card can be updated. 
   Specifically, when an amount deposited in a financial institution is withdrawn and the data of the amount is transferred to an IC card, the following methods can be considered.
     (1) An Automatic Teller Machine (hereinafter referred to as “ATM”) installed in a financial institution or department store is used.   (2) The IC card is connected to a telephone line via a telephone adapter or an electronic wallet with a modem interface to access a financial institution.   

   However, when the balance data in an IC card is insufficient for making purchases using the IC card, there is a drawback in method (1) that deposit cannot be withdrawn so as to increase the balance data in the IC card if there is no ATM close to the shop and purchases therefore cannot be made. Further, in method (2), there is also a drawback that it is necessary to always carry a telephone adapter or an electronic wallet with a modem interface. 
   The present invention therefore sets out to resolve the above problems. 
   SUMMARY OF THE INVENTION 
   In order to resolve the aforementioned problems, according to the present invention, a system for rewriting memory of an integrated circuit card comprises an integrated circuit card with built-in memory and a wireless terminal having an interface for being electrically connectable with the integrated circuit card. The wireless terminal makes a call to a base station while the integrated circuit card is being electrically connected to the interface of the wireless terminal for requesting data relating to internal data stored in the integrated circuit card from the base station. The wireless terminal rewrites the data of the memory of the integrated circuit card connected to the interface using received signals transmitted from the base station. 
   Further, data of an amount of money can be stored as internal data at the integrated circuit card. The base station can then be connected with a financial institution and the data of the amount of money can be rewritten by the wireless terminal using data from the base station in accordance with a request from the financial institution. 
   Moreover, according to the present invention, a wireless terminal comprises an interface with an integrated circuit card having a memory, a receiver for receiving data relating to internal data of the integrated circuit card from a base station while the integrated circuit card is being connected to the wireless terminal via the interface and a controller for exerting control in such a manner that the internal data of the integrated circuit card is rewritten in accordance with a data signal received by the receiver. 
   Here, a display can be provided for carrying out displaying in accordance with the rewritten internal data of the integrated circuit card. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a system diagram showing an embodiment of the present invention; 
       FIG. 2  is a flowchart showing the embodiment of the present invention; and 
       FIG. 3  is a flowchart showing the embodiment of a procedure for updating a balance according to the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     FIG. 1  shows an embodiment of the present invention applied to a two-way pager. Here, an antenna  10  is connected to a transceiver  11 . The transceiver  11  has a receiver and a transmitter and receives and demodulates radio signals transmitted from a center (pager base station) via the antenna  10  for outputting as prescribed data as well as converting various types of data to transmission signals transmitted to the center as radio signals via the antenna  10 . 
   An encoder/decoder  12  processes data received and modulated by the transceiver  11  to be decoded and then outputs the decoded data as well as processing data for transmission to be encoded for being supplied to the transceiver  11 . 
   A microcomputer  13  as a control means is for controlling operations of the pager etc. and has a CPU  131  for executing programs, a ROM  132  written with various programs, a RAM  133  used as a work area and various input/output circuits (not shown in the drawings). A balance routine  100  as shown, for example, in  FIG. 2 , is prepared as a part of a program at the ROM  132  and such processings as shown in  FIG. 3  are executed. Details of these processings will be described in detail later and the portion relating to the present invention are extracted to be shown in the balance routine  100 . 
   A ROM  14  written with an identification code (address information) is connected at the microcomputer  13  for identifying this pager and a RAM  15  is also connected to the microcomputer  13  for storing such data as received messages. An electromagnetic or piezoelectric speaker  16  is further connected to the microcomputer  13  for acoustically notifying the user (carrier) of calls to the pager. 
   A Liquid Crystal Display (LCD)  18  as a display element for displaying messages is connected to the microcomputer  13  via a display controller  17 . Various operation keys (switches)  19  are connected to the microcomputer  13  for giving such instructions as inputting of messages to be transmitted and controlling displaying of received messages. 
   An IC card interface  21  is also connected to the microcomputer  13 . This interface  21  is for connecting an IC card  30  to this pager and when, for example, the IC card  30  is inserted into this interface  21 , the IC card  30  is connected to the microcomputer  13  so that signals can be mutually transmitted therebetween via the interface  21 . The IC card  30  has contact points provided on the surface for making electrically connection with the interface  21 . The IC card  30  also has built-in memory, and can be provided with a built-in Central Processing Unit (CPU) when necessary. 
   Typical Processing 
   When an FSK (Frequency Shift Keying) signal is transmitted from the center and received by the transceiver  11 , the signal is demodulated and supplied to the encoder/decoder  12  so that identification code and data is extracted, and this identification code is compared with an identification code of the ROM  14 . When both identification codes coincide, data taken from the encoder/decoder  12  is taken to be valid, and a call sound is outputted from the speaker  16  together with the received message being displayed at the LCD  18  in accordance with operations of the keys  19 . 
   When the keys  19  are operated in a prescribed order so that a message to be transmitted to a destination is inputted to the pager, data for this message is temporarily stored in the RAM  15 . When the keys  19  are operated so that the number for calling the destination pager to which a message to be transmitted is inputted and an instruction is given to execute the transmission, the transceiver  11  is brought in a transmission state, a prescribed protocol is executed and the pager is connected with the center. 
   When the pager is connected with the center, the identification code of the ROM  14  and data for the message stored at the RAM  15  are supplied to the transceiver  11  after being encoded by the encoder/decoder  12 . The transceiver  11  converts the supplied date into a transmission signal and transmits the signal to the center. When this pager is then authenticated at the center using the identification code, message data is transmitted to the destination pager to call the destination pager and display the message. 
   Procedure at the Time of Updating a Balance 
   According to the present invention, an amount of a deposit is withdrawn from one&#39;s personal account in a financial institution and the data of the amount is transferred to the IC card  30  and the balance data of the IC card  30  is updated with the procedure of the flowchart of  FIG. 3 . Numerals ( 1 ) to ( 10 ) in  FIG. 3  correspond to numbers of the stages (1) to (10) in the following procedure. 
   Namely 
   (1) When the balance of the IC card  30  is updated, the IC card  30  is inserted into the interface  21  of the pager beforehand. The user then calls to the financial institution from an arbitrary telephone (push-button phone) and pushes the dial keys to carry out the operation of withdrawing an amount of a deposit by which the data of the deposit is transferred to the IC card  30  before hanging up. 
   In this case, the user inputs an account number for the deposit, a password number, an amount to be withdrawn (balance) and a pager call number etc. using the dial keys according to the audio instructions from the financial institution as an operation of withdrawing an amount. 
   (2) The data inputted by the user in the stage (1) are then checked by the financial institution and when this data is correct, the financial institution makes a request to the center for transmitting a withdrawal data. 
   (3) The center then sends a request for authentication of withdrawal and data for the withdrawal amount etc. to the pager. 
   (4) The pager checks the data transmitted from the center and when this is the request for authentication of the withdrawal in the stage (3), temporarily stores the transmitted data for the withdrawal amount in the RAM  15 . 
   The pager than reads out the authentication data such as the identification code stored in the IC card  30  from the IC card  30  and sends this authentication data to the center for confirmation. 
   (5) The center then verifies the authentication data sent from the pager as described in the stage (4) and sends permission of writing in the withdrawal amount (updating the balance) to the pager only when the verification is successful. 
   (6) If the pager receives permission in the stage (5), data for the withdrawal amount stored temporarily in RAM  15  in the stage (4) is read out to be written to the memory of the IC card  30 , and the balance is updated. 
   (7) When updating of the balance (writing of the amount to be withdrawn) is completed, this is notified to the pager from the IC card  30 . 
   (8) When the pager receives the notification as described in the stage (7), the pager sends notification of completion of the writing of the withdrawal amount to the center. 
   (9) The center transmits completion of the withdrawal to the financial institution. 
   When the financial institution receives this withdrawal completion notification, the balance of the users account is revised at the financial institution. 
   (10) After the transmission of completion of the withdrawal in the stage (9), the center sends notification of completion of control to the pager. 
   The pager repeats transmission of the notification of completion of the writing in the stage (8) to the center until this control completion notification can be received and when this control completion can be received, the series of the withdrawal processing is completed. 
   The above is the procedure for when a deposit is withdrawn and the balance data of the IC card  30  is updated. 
   Processing for the Pager 
   At the pager, the balance routine  100  is executes by the CPU  131  and processing to update the balance is carried out as described above, i.e. the pager enters a wait state due to the CPU  131  usually waiting for reception of data from the center in step  101 . 
   When data is then transmitted from the center and this is received, the process proceeds from step  101  to step  102 . In step  102 , a determination is made as to whether or not the data received is of the request for authentication in the stage (3). When this is of the request for authentication, the process proceeds from step  102  to step  103 . Then, in step  103 , the received data, i.e. data for the withdrawal amount transmitted together with the request for authentication, is temporarily stored in the RAM  15 . 
   Following this, in step  104 , the authentication data is read out from the IC card  30  via the interface  21 . Next, in step  105 , as described in the stage (4), this read out authentication data is supplied to the transceiver  11  after being encoded by the encoder/decoder  12  and then transmitted to the center for confirmation of the authentication. 
   After this, in step  111 , a determination is made as to whether or not the permission of writing in the stage (5) can be received from the center. When this cannot be received, the process proceeds from step  111  to step  112 , where a determination is made as to whether or not a prescribed limited period of time has elapsed from the starting of the reception check in step  111 . When this time has not passed, the process returns to step  111  from step  112 . The reception check occurring in step  111  is then repeatedly executed for a prescribed limited period of time. 
   When the permission of writing in the stage (5) can be received within this period of reception check, the process proceeds from step  111  to step  114 . In step  114 , as described in the stage (6), data for the withdrawal amount stored in the RAM  15  in step  103  is written in the IC card  30  via the interface  21  and the balance data of the IC card  30  is therefore updated. 
   The process then proceeds to step  121  where a determination is made as to whether or not completion of writing of the withdrawal amount has been notified from the IC card  30  as described in the stage (7). When this is not the case, the process proceeds from step  121  to step  122 , where a determination is made as to whether or not a prescribed limited period of time has elapsed from the starting of the check in step  121 . When this time has not passed, the process returns to step  121  from step  122 . The check in step  121  is then repeatedly executed for the prescribed limited period of time. 
   When the notification of the completion of the writing in the stage (7) is received within this period of checking, the process proceeds from step  121  to step  124  where, as described in the stage (8), data showing completion of writing in the IC card  30  is transmitted to the center. 
   The process then proceeds to step  125  where a determination is made as to whether or not data of completion of control in the stage (10) has been received from the center. When this has not been received, the process returns to step  124  from step  125 . Step  124  and step  125  are then repeated until the data of completion of control is received from the center and transmission of the data of completion of writing in the IC card  30  is repeated. 
   When the data of completion of control is received from the center, the series for the withdrawal process is completed. The process then returns to step  101  and the reception of data from the center is again waited. 
   When notification of completion of writing is not received within the limited period of time even if steps  121  and  122  are repeated, the process proceeds from step  122  to step  123  where error processing is executed so that, for example, the balance data in the IC card  30  is changed to the amount previous to execution of step  114  and the speaker  16  produces a buzzer sound notifying an error, and then the process returns to step  101 . 
   When permission of writing data is not received within the limited period of time even if step  111  and step  112  are repeated, the process proceeds from step  112  to step  113  where error processing is executed so that, for example, the speaker  16  produces a buzzer sound notifying an error and the process then returns to step  101 . 
   In step  102 , when the data received is not of the request for authentication in the stage (3), the process proceeds from step  102  to step  130 , where processing corresponding to the received data, for example, the aforementioned calling of the user is executed and the process then returns to step  101 . 
   According to the balance routine  100 , a payable amount of money in using an IC card  30 , i.e. a balance data of the IC card  30 , can be increased by withdrawing a deposit from a financial institution with the data of the withdrawn amount being transferred to the IC card  30 . 
   Others 
   When the prescribed key inputting is carried out using the keys  19  with the IC card  30  is inserted into the interface  21  beforehand, balance data is read out from the IC card  30  and the balance of the IC card  30  is displayed at the LCD  18  with this read out data. 
   CONCLUSION 
   With the pager shown in  FIG. 1 , an interface  21  with an IC card  30  is provided at the pager and the balance data of the IC card  30  can be updated in accordance with data from the center. This enables the insufficient balance data in the IC card  30  to be increased even when there is no ATM nearby and makes payments using the IC card  30  always possible. 
   Further, the pager is originally provided for portable use and is therefore not troublesome to carry about as in a telephone adapter or an electronic wallet with a modem interface. Moreover, the balance data of the IC card  30  can be displayed at the LCD  18  even without preparing an electronic wallet. 
   In addition, for example, when the amount to be withdrawn is inputted by pressing the dial keys of a telephone in the stage (1), if the operation of pressing the key “*” before inputting this amount makes the balance data of the IC card  30  to be reduced by the amount of withdrawal inputted in the stage (1) at the time of carrying out the processing of the stage (6) and makes the balance amount of the financial institution to be increased by the amount of withdrawal inputted in the stage (1) at the time of carrying out the processing of the stage (9), the amount of balance stored in the IC card  30  can be returned as a deposit, i.e. the balance of the account at the financial institution can be increased. 
   In the above, the present invention is applied to a two-way pager but the invention can also be applied to any portable terminal capable of transmitting and receiving data such as a Personal Handy System (PHS) or a portable telephone. 
   According to the present invention, a deposit can be withdrawn so as to increase the insufficient balance data of an IC card even when there is no ATM nearby and payments with an IC card is always made possible. Further, a pager is originally for portable use and it is no longer necessary to carry a burdensome device such as a telephone adapter or electronic wallet with a modem interface.