JP5098837B2 - Portable terminal device and reader / writer device - Google Patents

Description

  The present invention relates to a portable terminal device equipped with a SIM card having a wireless communication function and a reader / writer device that performs wireless communication via the SIM card.

  2. Description of the Related Art In recent years, some mobile terminal devices typified by mobile phones can insert and remove SIM (Subscriber Identity Module) cards. The mobile terminal device is in physical contact with the SIM chip provided in the SIM card, and performs data write processing to the SIM chip or data read processing from the SIM chip via the contact location.

Furthermore, Patent Document 1 discloses a portable terminal device that can insert and remove a SIM card further provided with an RF-ID (Radio Frequency Identification) tag. The RF-ID tag performs a data communication process with the reader / writer device by performing a data write process to the SIM chip or a data read process from the SIM chip.
Special table 2007-507766 gazette

  However, it is assumed that the SIM card is inserted into and removed from mobile terminal devices having various structures. However, since the structure in the vicinity of the SIM card when inserted into the mobile terminal device differs for each mobile terminal device, the SIM card is provided in the SIM card. The radio wave environment of the RF-ID tag is also different. For example, when the SIM card is inserted at a position facing the battery provided in the mobile terminal device and when it is inserted at a position away from the battery, the SIM card is at a position separated by a certain distance. The reception intensity of radio waves received by the RF-ID tag from the reader / writer device tends to be smaller in the former.

  As described above, the RF-ID tag included in the SIM card changes the radio wave environment, particularly the reception intensity of the radio wave received by the RF-ID tag, according to the structure of the mobile terminal device into which the SIM card is inserted. The threshold value of the minimum reception intensity required for the RF-ID tag to perform wireless communication is set according to the portable terminal device having the structure with the lowest reception intensity of radio waves received by the RF-ID tag. There is a need. As a result, the RF-ID tag receives a radio wave with a low reception intensity as a radio wave for radio communication, and the influence on the radio communication due to noise increases. For this reason, according to the structure of the portable terminal device in which the SIM card is inserted, it is required to set a threshold value of reception strength that the RF-ID tag requires at least in order to perform wireless communication.

  Similarly, when the SIM card is inserted in a position facing the back side of the battery of the mobile terminal device, when inserted in a position facing the front side of the battery, or away from the battery When compared with the case where it is inserted at the position, the transmission output of the signal transmitted from the RF-ID tag for making the reception level constant at the reader / writer device located at a certain distance is different. Therefore, it is required to set the transmission output level of the RF-ID tag for performing wireless communication according to the structure of the mobile terminal device into which the SIM card is inserted.

The present invention has been made in view of the above circumstances, and is a SIM card that can be inserted into and removed from a mobile terminal device and further has a wireless communication function, and the SIM card has a structure depending on the structure of the mobile terminal device to be inserted. It is an object of the present invention to provide a SIM card capable of suitably setting a reception intensity threshold value for determining that there is a reception signal by the wireless communication function and a transmission output when transmitting a signal.

  In order to solve the above-described conventional problems, a reader / writer device according to the present invention includes an antenna unit that performs wireless communication with the mobile terminal device by wireless communication, and a wireless communication control unit that controls wireless communication via the antenna unit. The antenna means is composed of two antenna parts provided at different positions, and the wireless communication control means authenticates to the mobile terminal device with one antenna part in an initial setting phase for performing settings related to wireless communication with the mobile terminal device. When a response signal for the authentication level signal is received from the mobile terminal device after transmitting the level signal, the other antenna unit controls to transmit the authentication level signal to the mobile terminal device.

  Thereby, regardless of how the user holds and holds the mobile terminal device, the angle between the reader / writer device and the mobile terminal device, the mounting position of the SIM card and the structure of the mobile terminal device, the mobile terminal device can be accurately connected. Since the distance is detected and the reader / writer device and the mobile terminal device perform authentication communication only within a predetermined distance, security and operability can be improved.

  In order to solve the conventional problem, the mobile terminal device of the present invention that performs wireless communication with the reader / writer device stores the reception strength of the authentication level signal transmitted from each antenna unit in the initial setting phase. The receiving operation is performed when the reception strength of the signal transmitted from the reader / writer device is higher than the two reception strengths stored in the storage device in the communication phase in which wireless communication is performed between the storage device and the reader / writer device. And a control means.

  As a result, regardless of how the user holds and holds the portable terminal device, the angle between the reader / writer device and the portable terminal device, the mounting position of the SIM card and the structure of the portable terminal device, the reader / writer device can be accurately connected. Since the distance is detected and the reader / writer device and the mobile terminal device perform authentication communication only within a predetermined distance, security and operability can be improved.

  When the reader / writer device of the present invention receives the response signal for the authentication level signal from the mobile terminal device after transmitting the authentication level signal to the mobile terminal device using one of the two antenna units, the other antenna unit Since the authentication level signal is transmitted to the mobile terminal device, it is related to how the user holds and holds the mobile terminal device, the angle between the reader / writer device and the mobile terminal device, the mounting position of the SIM card, and the structure of the mobile terminal device. Therefore, it is possible to accurately perform authentication communication with the mobile terminal device and improve security and operability.

  In addition, the mobile terminal device of the present invention is configured to perform a reception operation when the reception strength of a signal transmitted from a reader / writer device is higher than the reception strength of a signal transmitted from a different antenna unit. Therefore, authentication communication with the mobile terminal device accurately regardless of how the user holds the handheld device, how to hold it, the angle between the reader / writer device and the mobile terminal device, the mounting position of the SIM card, and the structure of the mobile terminal device. To improve security and operability.

1st invention is equipped with the antenna means which wirelessly communicates with the said portable terminal device by this wireless communication, and the wireless communication control means which controls the wireless communication via an antenna means, The antenna means was provided in the different position The wireless communication control means includes two antenna units, and the wireless communication control unit authenticates from the mobile terminal device after transmitting an authentication level signal to the mobile terminal device using one antenna unit in an initial setting phase in which settings related to wireless communication with the mobile terminal device are performed. When the response signal for the level signal is received, the reader / writer device controls the other antenna unit to transmit the authentication level signal to the portable terminal device.

  As a result, regardless of how the user holds and holds the mobile terminal device, the angle between the reader / writer device and the mobile terminal device, the mounting position of the SIM card and the structure of the mobile terminal device, the mobile terminal device can be accurately connected. Since the distance is detected and the reader / writer device and the mobile terminal device perform authentication communication only within a predetermined distance, security and operability can be improved.

  The second invention is a portable terminal device equipped with a SIM card having a wireless communication function for performing wireless communication with the reader / writer device in the first invention, and is transmitted from each antenna unit in the initial setting phase. Storage means for storing the reception strength of the authentication level signal, and reception in which the reception strength of the signal transmitted from the reader / writer device in the communication phase for performing wireless communication with the reader / writer device is stronger than the two reception strengths stored in the storage device. It is a portable terminal device provided with the control means which performs receiving operation when it is strong.

  This ensures accurate authentication with the mobile terminal device regardless of how the user holds and holds the mobile terminal device, the angle between the reader / writer device and the mobile terminal device, the mounting position of the SIM card and the structure of the mobile terminal device. Communication can be performed to improve security and operability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment)
FIG. 1 is a perspective view of a portable terminal device according to an embodiment of the present invention. The mobile terminal device shown in FIG. 1 includes a mobile terminal device 110 having a display, operation keys, and the like on the surface of the housing and a circuit board inside the housing, and a battery 111 that supplies power to the circuit board of the mobile terminal device body 119. And a cover 112 that protects the battery 111.

  The mobile terminal device 110 has a structure in which the SIM card 120 is inserted into the housing. The SIM card 120 is stored in the portable terminal device main body 111 by covering the battery 111 and the cover 112 in this order.

  The SIM card 120 includes a SIM chip 121 and a wireless circuit 122. A SIM chip 121 is provided on the surface of the SIM card 120 so as to be exposed. The mobile terminal device 110 is provided with a connection terminal that contacts the conductor plate of the SIM chip 121, and the mobile terminal device 110 and the SIM card 120 transmit and receive signals via the connection terminal.

  The portable terminal device according to the embodiment of the present invention is not limited to the one shown in FIG. 1, and can be applied to portable terminal devices having various structures in which a SIM card can be inserted and removed. When inserting a SIM card in various portable terminal devices with different SIM card insertion / removal structures, structures near the SIM card, and materials, the radio wave environment of the SIM card is different. The portable terminal device realizes setting of a reception strength threshold or a transmission output when transmitting a signal, which is necessary for the radio circuit and is necessary for performing radio communication, suitable for the radio wave environment.

  Next, FIG. 2 shows functional blocks of the portable terminal device and the SIM card according to the embodiment of the present invention.

  The mobile terminal device 110 includes a cellular transmission / reception unit 131, a storage unit 132, a SIM card connection unit 133, and a control unit 134.

  The cellular transmission / reception unit 131 transmits / receives digital data according to a predetermined communication method negotiated with a radio base station (not shown in FIG. 2).

  The storage unit 132 stores various data such as a program executed by the control unit 134, a calculation result generated by executing the program, and data input from the SIM card 120 via the SIM card connection unit 133.

  The SIM card connection unit 133 corresponds to the connection terminal with the SIM card 120 provided in the mobile terminal device 110 described above, and inputs and outputs signals to and from the SIM card 120.

  The control unit 134 refers to various programs stored in the storage unit 132, performs wireless communication control by the cellular transmission / reception unit 131, controls input / output of data to / from the SIM card 120, and stores data in the storage unit 122. Various controls such as writing and reading control are executed.

  On the other hand, the SIM card 120 includes a storage unit 141, a mobile terminal connection unit 142, a control unit 143, a short-range wireless transmission / reception unit 144, and an auxiliary storage unit 145.

  The storage unit 141 stores various data such as a program executed by the control unit 143, a calculation result generated by executing the program, and data input from the mobile terminal device 110 via the mobile terminal connection unit 142.

  The mobile terminal connection unit 142 corresponds to the above-described conductor plate of the SIM chip 121 exposed on the surface of the SIM card 120, and inputs and outputs signals to and from the mobile terminal device 110.

  The control unit 143 refers to various programs stored in the storage unit 141 and the auxiliary storage unit 145, performs wireless communication control by the short-range wireless transmission / reception unit 144, and data input / output control with the mobile terminal device 110. Various controls such as data writing to the storage unit 141 and reading control are executed. Further, the reception intensity value of the signal received by the short-range wireless transmission / reception unit 144 is detected.

  The short-range wireless transmission / reception unit 144 corresponds to the wireless circuit 122. The short-range wireless transmission / reception unit 144 is connected to a 400 MHz band specific low-power radio, a radio frequency identification (RFID) used for short-range communication or UWB via an antenna formed in the radio circuit 122. Signals are transmitted and received via radio waves such as Ultra Wide Band.

  The auxiliary storage unit 145 stores information necessary when, for example, a settlement process is performed between the mobile terminal device and the reader / writer device. Specifically, a password for connecting to a payment processing network operated by a bank, personal information regarding payment, and the like are stored. Information for performing such payment processing can be stored in the storage unit 141, but by storing the information separately from the storage unit 141, important information can be easily rewritten and deleted. Nor.

  Next, functional blocks of the reader / writer device are shown in FIG.

  The reader / writer device 150 includes a short-range wireless transmission / reception unit 151, a control unit 152, a storage unit 153, and an external communication unit 154.

  The short-range wireless transmission / reception unit 151 transmits / receives a signal to / from the short-range wireless transmission / reception unit 144 via an antenna formed in a wireless circuit (not shown). A plurality of these antennas are formed on the radio circuit, and each antenna is formed at a different position on the radio circuit.

  The control unit 152 performs some processing on the signal input from the short-range wireless transmission / reception unit 151. For example, data to be written to the SIM card 120 is read from the storage unit 153 and the read signal is output to the short-range wireless transmission / reception unit 151 and the external communication unit 154. Further, the reception intensity value of the signal received by the short-range wireless transmission / reception unit 151 is detected.

  The external communication unit 154 can be connected to an external server by connecting to an external communication network such as the Internet. For example, when performing a payment process, it connects to a payment processing network operated by a bank or a card company via an external communication unit 154 in response to a request signal from the SIM card 120, and communicates with a server held by the bank or the card company. I do.

  Next, an initial setting method for wireless communication between the mobile terminal device 110 and the reader / writer device 150 is shown in FIG.

  In order to perform the initial setting shown in FIG. 4, it is necessary to make the distance between the portable terminal device 110 and the reader / writer device 150 close to some extent and switch the portable terminal device 110 and the reader / writer device 150 to the initial setting phase. The initial setting phase is a phase for the mobile terminal device 110 or the reader / writer device 150 to perform an initial setting, and a threshold value and a signal of a reception intensity that determine that a signal transmitted from the reader / writer device 150 is a received signal are transmitted. This is a phase for suitably setting the transmission output at the time.

  When the portable terminal device 110 and the reader / writer device 150 are each switched to the initial setting phase, the reader / writer device 150 uses one of the plurality of antennas constituting the short-range wireless transmission / reception unit 151 to use the short-range wireless transmission / reception unit. An authentication level setting signal (SIG 401) is transmitted to 144.

  The control unit 143 detects the reception intensity value of the authentication level setting signal (SIG 401) received by the short-range wireless transmission / reception unit 144. If the reception intensity value is equal to or greater than a predetermined value, the reception intensity value is stored in the storage unit 141. To remember. Then, a response signal (SIG 402) is transmitted to the short-range wireless transmission / reception unit 151 via the short-range wireless transmission / reception unit 144. Note that the control unit 143 does not transmit the response signal (SIG 402) if the authentication level setting signal (SIG 401) cannot be received for some reason or if the reception intensity value is not equal to or greater than a predetermined value. Alternatively, a signal requesting retransmission of the authentication level setting signal is transmitted to the reader / writer device 150.

  Next, when the short-range wireless transmission / reception unit 151 receives the response signal (SIG 402), the control unit 152 detects the reception intensity value of the response signal (SIG 402), and whether or not the reception intensity value is equal to or greater than a predetermined value. To check. If the reception intensity value of the response signal (SIG 402) is not equal to or greater than a predetermined value, a signal requesting retransmission of the response signal (SIG 402) is transmitted to the mobile terminal device 110. If the response signal (SIG 402) cannot be received even if the request signal is transmitted several times, the authentication level setting signal (SIG 401) is transmitted again.

  If the reception strength value of the response signal (SIG 402) is equal to or greater than a predetermined value, the reader / writer device 150 uses a different antenna (authentication level setting) from among the plurality of antennas constituting the short-range wireless transmission / reception unit 151. An authentication level setting signal (SIG 403) is transmitted to the short-range wireless transmission / reception unit 144 via an antenna different from the antenna that transmitted the signal (SIG 401).

  The control unit 143 detects the reception intensity value of the authentication level setting signal (SIG 403) received by the short-range wireless transmission / reception unit 144. If the reception intensity value is equal to or greater than a predetermined value, the reception intensity value is stored in the storage unit 141. To remember. Then, a response signal (SIG 404) is transmitted to the short-range wireless transmission / reception unit 151 via the short-range wireless transmission / reception unit 144. If the reception intensity value of the authentication level setting signal (SIG 403) is not equal to or greater than a predetermined value, the control unit 143 does not transmit a response signal (SIG 404). Alternatively, a retransmission request signal of the authentication level setting signal (SIG 403) is transmitted.

  When transmitting the response signal (SIG 404), the control unit 143 compares the reception strength value of the authentication level setting signal (SIG 401) stored in the storage unit 141 with the reception strength value of the authentication level setting signal (SIG 403). The larger received strength value (X) is stored, and the smaller received strength value is deleted. Further, the transmission intensity value (Y) when the response signal (SIG 402) is transmitted is stored in the storage unit 141.

  Thus, when the transmission / reception of the authentication level setting signal and the response signal is completed between the mobile terminal device 110 and the reader / writer device 150 via different antennas constituting the short-range wireless transmission / reception unit 151, the mobile terminal device 110 The reader / writer device 150 is switched from the initial setting phase to the communication phase.

  The authentication phase is a phase that shifts after the initial setting phase is completed, and is a phase in which various data are transmitted and received between the mobile terminal device 110 and the reader / writer device 150. The authentication phase is divided into a pre-authentication phase and a main authentication phase. The pre-authentication phase is a period until the SIM card 120 receives a pre-authentication confirmation signal from the reader / writer device 150. Further, this authentication phase is a period until the SIM card 120 that has received the authentication request signal completes the payment process.

  Next, FIG. 5 shows a sequence between the portable terminal device 110 and the reader / writer device 150 in the communication phase. The reader / writer device 150 always transmits a pre-authentication request signal (SIG 501) at a constant cycle. When the short-range wireless transmission / reception unit 144 receives the pre-authentication request signal (SIG 501) transmitted from the reader / writer device 150, the control unit 143 detects the reception strength of the pre-authentication request signal received by the wireless transmission / reception unit 144.

  When detecting the reception strength of the pre-authentication request signal (SIG 501), the control unit 143 reads the reception strength value (X) of the authentication level setting signal stored in the storage unit 141 during the initial setting phase. Then, the control unit 143 compares the reception strength value (X) with the reception strength value of the pre-authentication request signal (SIG501), and the reception strength value of the pre-authentication request signal (SIG501) is greater than the reception strength value (X). When is large, the control unit 143 transmits a pre-authentication response signal (SIG502) to the reader / writer device 150 as a reception confirmation of the pre-authentication request signal via the short-range wireless transmission / reception unit 144. The transmission intensity when transmitting the pre-authentication response signal (SIG502) is the transmission intensity value (Y) stored in the storage unit 141. When the reception strength value of the pre-authentication request signal (SIG501) is smaller than the reception strength value (X), the pre-authentication response signal (SIG502) is not transmitted. Alternatively, a signal requesting retransmission of the pre-authentication request signal (SIG 501) is transmitted to the reader / writer device 150.

  Upon receiving the pre-authentication response signal (SIG502), the reader / writer device 150 detects the reception strength value of the pre-authentication response signal (SIG502) by the control unit 152, and if the reception strength value is equal to or greater than a predetermined value, An authentication confirmation (SIG 503) is transmitted, and then a read request signal (SIG 504) is transmitted.

  When the short-range wireless transmission / reception unit 144 receives the read request signal (SIG 504) from the reader / writer device 150, the control unit 143 detects the pre-authentication confirmation (SIG 503) and the reception intensity value of the read request signal (SIG 504), and If the received intensity value is equal to or greater than the received intensity value (X), the control unit 143 reads necessary data from the storage unit 141 and the auxiliary storage unit 145, and reads the various data (SIG 505) read from the short-range wireless transmission / reception unit 144. To the reader / writer device 150.

  The data (SIG 505) is an identification number that can identify an individual in an electronic entrance / exit management system, for example. In the case of payment processing, in addition to an identification number that can identify an individual, it is a password for connecting to a payment processing network operated by a bank.

  When the reader / writer device 150 has received the data (SIG 505) from the portable terminal device 110, the reader / writer device 150 exchanges information with an external server via the external communication unit 154 as necessary. In the case of the payment processing illustrated above, the user logs in to a payment processing server operated by a bank or a card company through an external communication unit 154 with an identification number and a password that can identify an individual. After the settlement processing server performs processing necessary for settlement, the external communication unit 154 receives a settlement processing end notification signal.

  Next, a write request signal (SIG 506) is transmitted from the reader / writer device 150 to the mobile terminal device 110. The write request signal (SIG 506) transmitted from the reader / writer device 150 to the mobile terminal device 110 is notification information indicating that the payment processing is completed, for example, in the case of payment processing.

  Finally, when the short-range wireless transmission / reception unit 144 has received the write request signal (SIG 506) transmitted from the reader / writer device 150, it transmits a write completion notification signal (SIG 507) to the reader / writer device 150.

  In FIG. 4, when the control unit 143 finishes transmitting the response signal (SIG 404), the reception strength value of the authentication level setting signal (SIG 401) stored in the storage unit 141 and the reception of the authentication level setting signal (SIG 403). The strength value is compared, the larger received strength value (X) is stored, and the smaller received strength value is deleted. However, the smaller received strength value may not be deleted. In this case, when a pre-authentication request signal (SIG 501), a pre-authentication confirmation signal (SIG 503), a read request signal (SIG 504), and a write request signal (SIG 506) are received in the communication phase, the respective reception strength values are received strength values. (X) It is compared whether or not. Even if each received intensity value is not equal to or greater than the received intensity value (X), if the received intensity value is equal to or greater than the smaller received intensity value compared to the smaller received intensity value, the pre- An authentication response signal (SIG502), data (SIG505), and a write completion notification signal (SIG507) may be transmitted. In particular, when each received intensity value is not equal to or greater than the received intensity value (X) several times, it is better to compare with the smaller received intensity value.

  By doing so, it is possible to avoid a situation in which retransmission is repeated between the mobile terminal device and the reader / writer device because the received signal is not equal to or greater than the received intensity value (X).

  As described above, the portable terminal device and the reader / writer device according to the present invention have the user's method of holding and gripping the portable terminal device, the angle between the reader / writer device and the portable terminal device, the mounting position of the SIM card and the portable device. Since communication is performed accurately regardless of the structure of the terminal device, the present invention can be applied not only to the portable terminal device but also to a device provided with a transmission / reception unit inside the device.

The perspective view of the portable terminal device of embodiment of this invention Functional block diagram of portable terminal device and SIM card according to an embodiment of the present invention Functional block diagram of a reader / writer device according to an embodiment of the present invention Sequence diagram of initial setting phase in portable terminal device and reader / writer device according to an embodiment of the present invention Sequence diagram of authentication phase in portable terminal device and reader / writer device according to an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 110 Portable terminal device 111 Battery 112 Cover 120 SIM card 121 SIM chip 122 Wireless circuit 131 Cellular transmission / reception part 132 Storage part 133 SIM card connection part 134 Control part 141 Storage part 142 Portable terminal connection part 143 Control part 144 Near field wireless transmission / reception part 145 Auxiliary storage unit 150 Reader / writer device 151 Short-range wireless transmission / reception unit 152 Control unit 153 Storage unit 154 External communication unit

Claims (2)

A mobile terminal device equipped with a SIM card having a wireless communication function,
Antenna means for wireless communication with the reader / writer device;
Storage means for storing reception strengths of signals transmitted from two antenna units provided at different positions of the reader / writer device in an initial setting phase for performing settings related to wireless communication with the reader / writer device ;
Control means for performing the receiving operation of the signal,
In the initial setting phase, if a response signal corresponding to the first signal is transmitted after receiving the first signal from one of the antenna units, then the second signal is received from the other antenna unit. And
In a communication phase in which wireless communication with the reader / writer device is performed, if the reception intensity of a signal transmitted from the reader / writer device is stronger than the reception intensity stored in the storage unit, the control unit performs a reception operation. The portable terminal device characterized by this. 2. The portable terminal device according to claim 1, wherein, in the initial setting phase, the storage unit stores a stronger one of the reception strengths of the first and second signals.