JPH0869509A - Reader writer - Google Patents

Abstract

PURPOSE: To increase the operation reliability and to reduce the load of development by monitoring the states of a command message and a response message and switching the state of transmission and reception to and from an external equipment and a data carrier, and setting a noncontact communication interface and a data carrier interface to the same two-way signal transmission speed. CONSTITUTION: A serial communication interface 11 monitors the transmission and reception states of an IC card and a reader writer. With a contact/ noncontact changeover switch 20, a connection with the IC card is turned ON and OFF and with a reception/transmission changeover switch 20, receiving operation and transmitting operation are switched. The signal transmission speed between the reader writer and IC card and the signal transmission speed between the reader writer and a POS terminal are equalized to 9600BPS. Consequently, a contact type program is basically usable, a program is easily developed and made small in development load, and an existent external equipment is applicable only by being altered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reader / writer to which a data carrier such as an IC card is connected, and more particularly to a reader / writer provided with a contactless communication interface.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a data carrier protector as described in JP-A-5-40713. This data carrier protector is an IC card (data carrier)
It has an insertion port for inserting the IC card and a storage section for storing the inserted IC card, and the storage section has a contact section for reading and writing the data of the IC card. A modulator that modulates electromagnetic waves, an antenna unit that radiates the data modulated by this modulator into the air, a demodulator that demodulates the electromagnetic waves received by this antenna unit, and encoded data that is demodulated by this demodulator I
It is provided with a contact section for writing to the C card and a switching section for switching between a transmitting state and a receiving state.

The data exchange of the protector will be described in detail. An IC card is inserted in the protector in advance, and when a transmission request signal transmitted from an external device is received by the antenna section, switching is performed according to the signal. The unit is switched to the receiving state. Next, the command signal is received, and the command signal is demodulated by the demodulator and transmitted to the IC card via the switching unit and the contact unit. After that, when the reception request signal transmitted from the external device is received by the antenna unit,
The switching unit is switched to the transmission state by the signal.

On the other hand, the IC card outputs a response signal after processing the command signal, and this response signal is input to the modulator via the contact portion and the switching portion,
The system is such that the modulated signal is output from the antenna section toward the external device.

[0005]

However, in this system, the protector is switched to the receiving state or the transmitting state by the electromagnetic wave signal (transmission request signal or reception request signal) radiated from the external device. The electromagnetic wave signals (transmission request signal, reception request signal) may not be properly received due to the influence of various noises (for example, lightning and other electromagnetic waves), and there is a problem in operation reliability.

Further, since this protector is one type of non-contact communication reader / writer, the external device (eg, POS terminal, personal computer, etc.) has a non-contact communication reader / writer in addition to the programs up to now. There is a new problem in that a new program that can be contacted must be developed, which imposes a heavy development burden and cannot be directly applied to existing external equipment.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a reader / writer which has high operation reliability and can reduce the development load.

[0008]

In order to achieve the above object, the first aspect of the present invention is to provide a data carrier interface connected to a data carrier such as an IC card and an external device such as a POS terminal. However, the present invention is intended for a reader / writer having a contactless communication interface capable of communicating in a contactless state such as infrared light communication.

Then, the signal received from the contactless communication interface is directly transmitted as a command message to the data carrier via the data carrier interface, and the response message output from the data carrier is contactless as it is via the data carrier interface. One transmission line transmitted from the communication interface to the external device and the state of the command message and the response message on the transmission line are monitored to switch the transmission / reception state to the external device and the data carrier, for example, a serial communication interface And a switching means such as a microprocessor, the transmission speed of a signal from the non-contact communication interface to the data carrier interface, and the data carrier interface to the non-contact communication interface It is characterized in that the transmission speed of the signal is the same.

In order to achieve the above-mentioned object, the second aspect of the present invention provides a non-contact such as infrared optical communication between a data carrier interface connected to a data carrier such as an IC card and an external reader / writer body. The present invention is intended for, for example, a card case-shaped reader / writer having a non-contact communication interface capable of communicating in a contact state.

Then, the signal received from the contactless communication interface is directly transmitted as a command message to the data carrier via the data carrier interface, and the response message output from the data carrier is contactless as it is via the data carrier interface. Monitor the status of one transmission path and the command message and response message on the transmission path sent from the communication interface to the external reader / writer,
For example, a serial communication interface and a switching unit such as a microprocessor are provided for switching the transmission / reception state to / from the external reader / writer body and the data carrier, the transmission speed of a signal from the non-contact communication interface to the data carrier interface, and the data carrier interface. It is characterized in that the transmission rate of signals from the device to the contactless communication interface is the same.

[0012]

As described above, according to the present invention, since the switching means for switching the transmission / reception state is provided inside the reader / writer, there is no adverse effect of external noise unlike the conventionally proposed ones, and therefore an appropriate switching operation can be performed. The operational reliability can be improved. Further, the transmission rate of the signal from the contactless communication interface to the data carrier interface and the transmission rate of the signal from the data carrier interface to the contactless communication interface are the same, and the signal received from the contactless communication interface is the data carrier interface. The command message is directly input to the data carrier via the data carrier, and the response message output from the data carrier is directly transmitted from the contactless communication interface to the external device or the external reader / writer body via the data carrier interface. . Therefore, the contact-type programs that have been commonly used in the past can be used basically. Therefore, the program development is easy and the development burden is small, and it can be applied by simply improving the existing external device or external reader / writer body. It will be possible.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a configuration diagram of a cashless shopping system according to an embodiment.

1 in the figure is an IC card owned by the user,
Reference numeral 2 is a card case-shaped reader / writer with a non-contact communication function (hereinafter abbreviated as a card case), 3 is a reader / writer main body with a non-contact communication function (hereinafter abbreviated as a reader / writer), and 4 is a POS terminal.

In the IC card 1, balance amount information with a premium attached in exchange for cash is input in advance. A person who does not have the card case 2 but has only the IC card 1 can insert the I / O into the reader / writer 3 connected to the POS terminal.
By inserting the C card 1, the purchase price can be paid.

A person who holds the IC card 1 in the card case 2 does not take out the IC card 1 and holds it in the card case 2.
When the transmission / reception part of is directed to the light reception / emission part of the reader / writer 3, the command and response of the IC card 1 are transmitted by infrared light communication, and the purchase price is paid.

FIG. 2 is a diagram showing a processing flow between the POS terminal, the reader / writer and the IC card when the IC card is directly inserted into the reader / writer to pay the price.

When the purchase price is input to the POS terminal and the total price of the purchase is output (not shown), the POS terminal sends an instruction command to the reader / writer for the payment.
Then, the reader / writer waits until the insertion of the IC card is detected, applies power to the IC card, supplies a clock signal and cancels the reset, and the IC card sends a reset response (ATR) to the reader / writer.

The reader / writer sends a command message for initialization, a read command message for the balance, and a write command message for the reduced balance to the IC card,
The IC card returns a response message for each message. When these operations are completed normally,
The reader / writer returns completion information to the POS terminal.

FIG. 3 is a diagram showing the format of the above-mentioned command message and response message.
Is a start character indicating the beginning of the message, and is fixed to (55) ₁₆ in this embodiment. C is a command that defines the operation, DL is a data length indicating the number of bytes in the data part, DATA is data to be stored, BCC is an ST described later.
To ST immediately before BCC, a block check character for storing the calculated value of the exclusive OR, ST is a status indicating whether the execution result of the command is normal or what kind of abnormality.

FIG. 4 is a diagram showing a processing flow among the POS terminal, the reader / writer, the card case, and the IC card when the payment is made using the card case.

The cardholder is required to pay the IC for payment.
Insert the card into the card case, point the light emitting / receiving part of the card case toward the light emitting / receiving part of the reader / writer, and press the send button. Then, a communication start instruction message is sent from the card case to the reader / writer, and the reader / writer sends a power ON instruction message to the card case. Then, the card case supplies power to the IC card and sends the ATR returned from the IC card to the reader / writer.

Thereafter, the command message and the response message are exchanged as in the case of FIG. The communication start processing in FIG. 4 corresponds to the card insertion operation in FIG. Further, the transmission and reception of the command message and the response message are only different between the contact type and the non-contact type between the reader / writer and the IC card.

The present embodiment has the effect that the process for inserting the card directly into the reader / writer and the process for using the card case are the same for the POS terminal. Also,
Since the same command and response can be used for the processing of the reader / writer, the development cost of the program can be reduced.

FIG. 5 is a block diagram of the reader / writer 3.
In the figure, 5 is a microprocessor for performing various control operations described later, 6 is a ROM in which various programs are stored, 7
Is a RAM, 8 is a timer for setting a message waiting time and inter-character time, which will be described later, 9 is an interface with a POS terminal, 10 is a power control circuit for controlling power supply to an IC card, 11 is an IC card and a reader / writer. Serial communication interface for monitoring the transmission / reception operation of the device, 12 is a response switch (SW2) that is turned on when receiving a message from the reader / writer, 13 is a demodulation circuit, 14 is a light receiving circuit that receives an optical signal from the reader / writer, 15 Is a command switch (SW3) that is turned on when transmitting a message to the reader / writer, 16 is a modulation circuit, 17 is a light emitting circuit that transmits an optical signal to the reader / writer, 18 is an IC card interface for connecting to an IC card, 19 Turns ON / OFF the connection with the IC card Contact - contactless changeover switch (SW1), 20 is received to switch the reception and transmission operations - a transmission selector switch (SW4).

The signal transmission speed between the reader / writer 3 and the IC card 1 as well as the reader / writer 3 and the POS terminal 4
The signal transmission speeds between and are 9600 BPS, which are the same transmission speed.

FIG. 6 is a diagram showing a processing flow of the reader / writer, and the processing of the reader / writer will be described with reference to FIG. 5 and FIG.

First, in step 1 (S1), POS
Wait for the debit instruction message from the terminal 4. This message contains the amount of money to be deducted. Upon reception, in S2, the contact / non-contact changeover switch (SW1) 19 is turned off, the response switch (SW2) 12 is turned on, the command switch (SW3) 15 is turned off, and the reception / transmission changeover switch (SW4) 20 is received (Rx) side. Defeat it and IC at S3
Wait until the card 1 is inserted or the communication start instruction message is received from the card case 2.

The insertion of the IC card 1 is detected by a photosensor (not shown) installed inside the reader / writer 3, and the detection of the communication start instruction message from the card case 2 is detected by the light receiving circuit of the reader / writer 3. This is done by monitoring the presence or absence of light reception at 14.

In S4, it is determined whether or not the IC card 1 is inserted. If the IC card 1 is inserted, in S5 SW1 is turned on and SW is turned on.
2 is OFF, SW3 is OFF, and SW4 is on the receiving (Rx) side, power supply from the power supply control circuit 10 to the IC card 1 is started in S6, and ATR from the IC card 1 is received in S7. When receiving is completed, send SW4 in S8 (Tx)
Switch to the side, S9 IC card interface 18
A command message is transmitted to the IC card 1 via.

When the transmission is completed, SW4 is switched to the receiving (Rx) side in S10, and the response message from the IC card 1 is received in S11. The command transmission / reception is repeated while sequentially switching the SW4, and when it is determined in S12 that the transmission of all commands is completed, the supply of power to the IC card 1 is stopped in S13, and the IC card 1 is ejected from the reader / writer 3. Then, after SW1 is turned off in S14, the completion information is transmitted to the POS terminal 4 through the POS terminal interface 9 in S15, and the payment withdrawing instruction message is waited again (S1).

When it is determined in S4 that the card is not inserted, SW1 is turned off, SW2 is turned off, and SW3 is turned on in S16.
Is turned on and SW4 is switched to the transmission (Tx) side, and a power ON instruction message is transmitted to the card case 2 in S17. When transmission is completed, SW2 is turned on and SW3 is turned on in S18.
OFF, switch SW4 to the receiving (Rx) side, S19
Then, the ATR from the IC card 1 is received.

When reception is completed, SW2 is turned off in S20.
F, SW3 is turned on, SW4 is switched to the transmission (Tx) side, and in S21, the command message is directly transmitted to the IC card 1 inserted in the card case 2 via the modulation circuit 16, the light emitting circuit 17 and the contactless interface. .

When the transmission is completed, SW2 is turned on in S22,
SW3 is turned off, SW4 is switched to the receiving (Rx) side,
In S23, the response message from the IC card 1 is received via the contactless interface, the light receiving circuit 14, and the demodulation circuit 13. The command transmission / reception is repeated while sequentially switching SW2 to SW4, and when it is determined that the transmission of all commands is completed in S24, SW2 is turned OFF in S25, and the completion information is transmitted via the POS terminal interface 9 in S15. 4 and waits again for a debit instruction message (S1).

FIG. 7 is a block diagram of the card case 2.
In the figure, 21 is a microprocessor, 22 is a ROM, and 23.
Is a RAM, 24 is a timer, 25 is a battery voltage detection circuit for monitoring the voltage of the IC card power supply battery built in the card case 2, and 26 is ON / OFF of power supply to the IC card.
A power control circuit for turning off, a liquid crystal driver controller 27 for controlling a display operation, and a liquid crystal display device (LC).
D), 29 is a key control circuit for controlling the key input operation,
30 is a key, 31 is a serial communication interface, 32 is a reception-transmission changeover switch (SW
8) 33 is a command switch (SW6), 34 is a demodulation circuit, 35 is a light receiving circuit, and 36 is a response switch (SW).
7), 37 is a modulation circuit, 38 is a light emitting circuit, and 39 is a contact-
The non-contact changeover switches (SW5) and 40 are IC card interfaces, and the overall configuration is similar to that of the reader / writer 3 shown in FIG.

The signal transmission speed between the card case 2 and the IC card 1 and the signal transmission speed between the card case 2 and the reader / writer 3 (or the POS terminal 4) are both 9600 BPS and the same transmission speed. There is.

8 to 10 are flowcharts showing the processing flow of the card case, and the processing of the card case will be described with reference to FIGS.

This process flow is started by turning on the power (pressing the ON / OFF key 41 shown in FIG. 14), and the contact / non-contact changeover switch SW5 is turned on in step S31.
N, command switch SW6 OFF, response switch SW7 OFF, reception-transmission changeover switch SW
8 is set on the receiving (Rx) side. Then, in S32, the supply of power to the IC card 1 inserted in the card case 2 is started via the power supply control circuit 26, a clock signal is supplied to release the reset, and then the IC is transferred to S33
Receive ATR from card 1.

Next, SW8 is switched to the transmission (Tx) side in S34, and the balance read command message is sent to the IC in S35.
The data is sent to the card 1, the SW8 is switched to the receiving (Rx) side in S36, the response message from the IC card 1 is received in S37, and the balance before payment is displayed on the LCD 28 based on the response message (S3).
8). Then, the power supply to the IC card 1 is once stopped, and the send button 42 attached to the card case 2 is temporarily stopped.
It waits for (see FIG. 14) to be pressed (S40). In addition,
In this example, after displaying the balance before payment,
Although the power supply to the IC card 1 is stopped, the power supply state may be maintained.

When the send button is pressed, SW5 is turned off.
F and SW7 are turned on, SW8 is switched to the transmission (Tx) side, and a communication start instruction message is transmitted to the reader / writer (R / W) 3 in S42. Next, in S43, SW6 is turned on, SW7 is turned off, SW8 is switched to the receiving (Rx) side, and in S44, the power source O from the reader / writer (R / W) 3 is turned on.
Wait for the reception of the N instruction message. When the power-on instruction message is received, SW5 is turned on and SW6 is turned on in S45.
The FF and SW7 are turned ON to set the response transmission state from the IC card 1, the power supply to the IC card 1 is started in S46, and the A from the IC card 1 is started in S47.
TR is received, and the received ATR is transmitted to the reader / writer 3 as it is. The card case 2 does not modify the transmission information from the IC card 1 and simply monitors the completion of the transmission to the reader / writer 3.

When it is determined in S48 that the ATR transmission is completed, the SW6 is turned on and the SW7 is turned off in S49 to set the command reception state from the reader / writer 3 to the IC card 1, and the command transmission in S50. It is determined whether the reception is completed or the command is not received for a certain period of time, and it is determined in S51 whether the command reception is completed or not.

When it is determined that the command has been received, the switch SW6 is turned off and the switch SW7 is turned on in S52,
In S53, it is determined whether the transmission of the response is completed or the response is not received for a certain period of time. As shown in S49 to S53, command switches are transmitted from the reader / writer 3 to the IC card 1 and response messages are sequentially transmitted from the IC card 1 to the reader / writer 3 while switching various switches.

FIG. 11 is a diagram showing a detailed flow of the above-mentioned determination processing in S50 and S53. After sending the response to one comment message,
If the next command message is sent, it will be sent within a fixed time (for example, 200 ms).
In case of 50, the message timeout monitoring time is 200
The argument for setting the timer is set to ms, and the subroutine of FIG. 11 is called.

Also, since the reply message is returned from the IC card within 100 ms at the latest after the completion of the transmission of the comment message to the IC card, in the case of S53, the message waiting timeout monitoring time is set to 100 ms by the timer. The arguments are set and the subroutine of FIG. 11 is called.

In the subroutine of FIG. 11, the message waiting timeout monitoring time is first set in the timer in S71 based on the value of the argument. The serial communication interface (SCI) has a register called a receive data register (RDR), and the received data is stored here every time one byte of data is received. In this subroutine, checking whether the received data has entered the RDR by checking the status register and checking whether the timer has timed out are alternately executed (S
72).

In the case of time-out, a return code indicating that a message has not been received is set for a certain period of time in S74, and this subroutine is finished.

If there is data in the RDR, S75
Leads the RDR. This read is performed to enable the next data reception. Since the end of the message is monitored in this subroutine, the read value is not used.

As shown in FIG. 3, the command message,
The response message is the start character (S
After the arrival of C), data is continuously sent without any time gap between bytes. Therefore, the time-out monitoring time between characters is set to, for example, 3 ms in the timer (S76), and 3 m after receiving one data.
If the next data is not received after the elapse of s, it is assumed that the message has been sent to the end. Therefore, it is checked alternately whether data has entered the RDR or has timed out (S77).

In the case of inter-character time-out, a return code indicating the end of command reception is set in S79 and the subroutine ends. If there is data in the RDR, read the RDR in S80 and then re-execute S7.
Then, it moves to step 7 and checks whether there is data in RDR or whether it has timed out.

12 and 13 are diagrams showing the alternative processing flow of FIG. Although the processing flow of FIG. 11 is relatively simple, after the transmission of the IC card command message is completed,
For example, when the return of the response message is started in a short time of 1 ms, the reception end of the command message cannot be detected.

Also, after the IC card command message has been transmitted, if the next command is started to be transmitted in a short time of, for example, 1 ms, the command message transmission completion cannot be detected.

The processing flows shown in FIGS. 12 and 13 are based on the command message and response message formats shown in FIG. First start character (SC)
Waiting for (55) _{16 to} be sent in S95. (5
5) If ₁₆ has not been sent for a certain period of time, a return code indicating that a message has not been received is set for a certain period of time in S96, and this subroutine ends.

If erroneous data other than (55) ₁₆ is sent due to noise, for example, it is skipped, and the process waits until (55) ₁₆ is sent. (55) When ₁₆ is sent, S
The reception byte counter is set to 1 in 97, the inter-character timeout monitoring time is set to 3 ms in S98, and the subsequent data is received.

When the reception counter reaches 3 bytes (S10
3) Since the data of the 3rd byte is the data length (DL),
The data is stored in a variable called DL in S104, and the subsequent data is continuously received. And the received byte count is DL + 4
If so (Y in S109), a return code indicating that all commands have been received is set in S110 and the process returns.

Even when the character-to-character timeout occurs after waiting for the reception of the second byte, the return code is set and a return code indicating that the command has been received is considered to have been completed although transmission of the message was completed. For example, if a time-out occurs between characters in the middle of a command message, the IC card returns a command error response, and the command is retransmitted from the reader / writer (not shown). If the inter-character timeout occurs in the middle of the response message, the command is retransmitted from the reader / writer (not shown).

Returning to FIG. 9 again, if it is determined in S51 that command reception has not ended, that is, command reception has not been performed for a certain period of time, the process proceeds to the step shown in FIG. That is, the card case 2 stops receiving and transmitting commands from the reader / writer 3, turns on SW5 and turns off SW6 in S54.
F, SW7 is set to OFF, SW8 is set to transmission (Tx) to switch to the command transmission state, and in S55, the IC card 1
To the balance read command message. Then, SW8 is switched to reception (Rx) in S56, and S57
Then, the response message from the IC card 1 is received,
The payment amount is calculated from the balance before payment and the current balance received in S37 [(previous balance)-(current balance)] and displayed on the LCD of the card case 2 (S58).
For example, when displayed for 10 seconds, the power supply of the card case 2 is automatically turned off (S59), and a series of processing ends.

FIG. 14 is an external view of the card case 2, which is in the shape of a thin card for convenient carrying. In the figure, 41 is an ON / OFF key, 42 is a transmission key, 43 is a card insertion slot, 44 is a card ejection switch, and the figure shows a state in which the balance amount is displayed on the LCD 28. Although not shown in the drawing, the IC is communicated with the inside of the card insertion opening 43.
An accommodating portion having a space for accommodating the card 1 is formed, and an IC card interface is provided in the accommodating portion. On the front end face side of the card case 2, a light emitting / receiving unit (non-contact interface) for optical communication with the reader / writer 3 is provided.

FIG. 16 is a diagram showing another embodiment in which the functions of the POS terminal and the reader / writer are different. The reader / writer of this embodiment does not have the intelligence of independently executing commands and responses to the IC card, but is characterized in that the POS terminal transmits the IC card commands and responses.

FIG. 17 is a diagram showing a processing flow when payment processing is performed by optical communication using a card case without directly inserting the IC card into the reader / writer in the embodiment of FIG. 16, and is shown in FIG. The difference from is that the communication start instruction message is transmitted from the card case instead of inserting the IC card, and the power ON message is transmitted to the card case instead of turning on the power of the IC card.

Card commands and responses are the same as in FIG. 16 except that they pass through a non-contact transmission system. When the IC card eject command is received, the IC card is not inserted in the first place, and the response is returned as it is.

In this embodiment, since the card command transmission process is performed on the POS terminal side, the program amount of the POS terminal is large, but when communicating with the card case in a contactless manner, it is possible to communicate with the IC card in the reader / writer. Since the same processing is required, the development load of the program is greatly reduced.

FIG. 15 is a diagram showing a schematic processing flow of the POS terminal in the examples of FIG. 16 and FIG. At the POS terminal, the purchase price is input in S101,
In S102, the total amount of money to be withdrawn is calculated and the purchase price is confirmed. In S103, the reader / writer (R /
A sense command for checking whether the IC card is inserted is sent to W), the IC card is inserted in the reader / writer in S104, the power supply and the clock signal are applied, the reset is released, and the response is received from the IC card. Is done. Then, in S105, a check is made as to whether or not the card power ON completion flag is set in the response, in S106, an initialization command is transmitted, in S107, a response to it is received,
In S108, a read command for reading the balance of the IC card is transmitted, in S109, a response to it is received, S11.
When 0, the write command for reducing the balance is transmitted, in S111, the response to it is received, in S112, the card ejection command to eject the IC card is transmitted, and in S113, the response to it is received.

Although not shown, when there is a transmission error in each command message or response message,
The retransmission process is performed a predetermined number of times.

FIG. 18 is a system configuration diagram of still another embodiment, in which the numeric keypad 4 for inputting a personal identification number is added to the reader / writer 3.
5 and LCD 46 for guidance display are attached.

FIG. 19 is a block diagram of the reader / writer 3, in which 47 is a liquid crystal driver controller and 48 is a key control circuit.

FIG. 20 shows the PO when the IC card is directly inserted into the reader / writer and payment is made in this embodiment.
It is a figure showing the processing flow between the S terminal, the reader / writer, and the IC card. As shown in FIG.
After the ATR is returned by the power supply to the C card, the initialization command and the response of the IC card are transmitted and received, and the check command and the response of the personal identification number are transmitted and received according to the personal identification number entered by the key. When it is determined that this is appropriate, the ready flag is set in the response to the sense command of the POS terminal. After that, it is similar to the previous embodiment.

FIG. 21 is a POS terminal for paying the price by optical communication using a card case without directly inserting the IC card into the reader / writer in the embodiment of FIG.
It is a figure showing a processing flow between a reader / writer, a card case, and an IC card. In the case of this embodiment, in the card case, the power of the IC card is turned on, the ATR is received, the initialization command and the response are transmitted and received, and the check command and the response of the personal identification number entered by the key of the card case are transmitted and received. deep. Then, when the send button of the card case is pressed after the total payment amount of the POS terminal is output, a communication start instruction message is sent to the reader / writer. Then, the ready flag is set in the response of the sense command sent from the POS terminal, and the IC card command and response are transmitted and received from the POS terminal.

The above-mentioned personal identification number is for providing security to the IC card, and can prevent unauthorized use of the IC card.

FIG. 22 is a block diagram of a reader / writer according to another embodiment. This embodiment is different from that shown in FIG. 19 in that a reader / writer is provided with a first serial communication interface 11a and a second serial communication interface 11b, and a response switch 12, a command switch 15 and a contact / non-contact switching are provided. The switch 19 is ON / OFF controlled by an external MPU 49.

The second serial communication interface 11b is provided for monitoring the communication start instruction message, the command message, and the response message, and controlling the switching of the response switch 12, the command switch 15, and the contact-contactless changeover switch 19. ing.

The card detection signal of the IC card interface 18 is input to the MPU 5 and then to the MPU 5. When the IC card 1 is connected to the IC card interface 18 and the card detection signal is actually input, the MPU 49 sends the signal to the MPU 5 as it is, and also when the communication start instruction message is input from the card case, the MPU 5 sends the signal to the MPU 5. Send a card detection signal.

In this embodiment, an optical communication function is added to a reader / writer which does not have an optical communication function, and includes an MPU 49 (which has a ROM, RAM and a serial communication interface (not shown) built therein), a light receiving circuit 14 and a demodulating circuit. A circuit including a response switch 12, a command switch 15, and a contact / non-contact changeover switch 19 is added to the I / O line and the card detection signal line of the existing reader / writer. The additional part is prepared as an optional product of the existing reader / writer. Since the command message and response message of the IC card are transmitted and received as they are by optical communication, the MUP5 program (stored in ROM 6) used when the above optional product is not installed is also used when the optional product is installed. Can be used as is.

In the above embodiment, the IC card of the system user was simply inserted into the reader / writer.
An IC card that encrypts communication with a C card, an IC card that stores the amount of money reduced from the IC card of the system user, and the like are ICs of the system user.
It can be attached to the reader / writer separately from the card.

FIG. 23 is a block diagram of a reader / writer according to this embodiment, and FIG. 24 is a POS terminal, a reader / writer, and a store where the reader / writer is always installed when an IC card is inserted into the reader / writer for use. It is a figure which shows the processing flow of an IC card for users and an IC card for users.

In FIG. 23, 50 is an IC card for a store,
Reference numeral 51 is an interface of the shop IC card 50. The reader / writer IC card 50 for store is provided with a lid at the insertion port so that the IC card 1 for a user cannot be inserted by mistake.

The store IC card 50 is mounted on the reader / writer 3 after the POS terminal 4 and the reader / writer 3 are turned on. Then, the power and the clock signal are supplied to the IC card for shop 50, and the reset is released.

At the POS terminal, when the total amount of the customer's purchases is reached, a sense command for checking the insertion state of the user IC card 1 is issued to the reader / writer. User IC
When the card 1 is inserted, the power is supplied, and the ATR is returned, the ready flag is set in the response of the sense command.

Next, the POS terminal transmits a payment withdrawal command from the user IC card 1 to the store IC card 50 via the reader / writer. When sending a command, the contact / contactless changeover switch 19 (S
W1), the response switch (SW2), and the command switch (SW3) are off, and the contact / non-contact changeover switch 19 (SW1) is turned on immediately after the transmission is completed.
To do.

The store IC card 50 sends the initialization command, read command,
By transmitting the write command and receiving the respective responses, the cash data of the user IC card 1 is reduced and the cash data of the store IC card 50 is increased.
After that, the store IC card 50 is transferred to P via the reader / writer.
Returns the response to the debit instruction command to the OS terminal. In this embodiment, the command and response between the serial communication interface and the shop IC card and the command and response between the shop IC card and the user IC card pass through one I / O line, so the command message and response The start character (SC) of the message is distinguished as follows.

.. Command SC (51) ₁₆ ． SC of the response of the user IC card from the store IC card (52) ₁₆ . SC of the response from the user IC card to the store IC card (53) _{16 In} this way, the message system allows the command message and the response message to be distinguished. Further, the response message has a message system capable of distinguishing between the response to the reader / writer and the response to the shop IC card 50. Therefore, there is no problem even if the serial communication interface 11, the shop IC card 50, and the user IC card 1 are connected by one I / O line.

However, the shop IC card 50 and the user IC
The built-in program of the card 1 is the same,
I received a debit instruction command from the reader / writer
The C card issues a read command and a write command to another IC card. Therefore, it is necessary to turn off the contact / non-contact changeover switch 19 (SW1) only when the reader / writer issues a price withdrawing instruction command.

FIG. 25 uses the reader / writer shown in FIG. 23 and the card case shown in FIG. 7, and uses a POS terminal, a reader / writer, and a store for contactless payment processing of a user IC card in the card case. It is a figure which shows the processing flow of an IC card and a user IC card.

After confirming the total amount of shopping at the POS terminal,
When the customer presses the send button on the card case, a communication start instruction message is sent from the card case to the reader / writer. At this time, the command switch is turned on and the response switch is turned off, and then the reader / writer sends a power-on instruction message to the card case. At this time, the command switch is OFF and the response switch is ON. Hereinafter, the command switch and the response switch are switched ON / OFF according to transmission / reception.

Then, the card case supplies power to the user IC card and transmits the ATR of the user IC card to the reader / writer. Next, the ready flag is set in the response of the sense command transmitted from the POS terminal to the reader / writer, and the POS terminal passes through the reader / writer.
Send the debit instruction comment to C card.

Then, the store IC card transmits an initialization command, a read command, and a write command to the user IC card through a non-contact system, and receives respective responses. After that, the store IC card returns a response to the debit instruction comment to the POS terminal.

Then, the POS terminal issues a user card ejection command to the reader / writer, but since the user IC card is not contained in the reader / writer, nothing is done and a response is returned. After the command exchange is completed, the card case reads the remaining amount of the user IC card and stops the supply of card power, then calculates the payment amount and displays it for a certain period of time (for example, 10 seconds), and then turns on the power of the card case. OF
F

This embodiment is an example in which an IC card is first inserted into a reader / writer and the system is operated for payment, and then the system is expanded so that contactless communication using a card case can also be used. IC card command,
Since the response was directly communicated without any contact, the POS terminal before expansion and the I / O
The C card can be used as it is, and it suffices to improve the reader / writer and develop the card case.

In this embodiment, the IC card is issued by the bank, and the user can deposit the card at the bank.
Further, the shop owner has a system in which the shop IC card installed in the reader / writer can be exchanged for cash if he / she takes it to a bank.

The non-contact communication described above includes, for example, optical communication using infrared rays or the like, or a method using radio waves.

The POS terminal, reader / writer, and
The processing flow of the card case and the IC card is just an example, and various other processing flows can be applied.

The system can be applied to various fields such as attendance / leaving management, book lending management, and health management. Depending on the application field, a reader / writer can be connected to a personal computer, workstation, handy terminal,
It is different from medical devices and specialized devices integrated with reader / writer.

In the above embodiment, the case where the non-contact communication function is added to the reader / writer has been described, but the reader / writer and the non-contact communication device may be separated.

When the IC card is not inserted into the reader / writer and all are put in the card case for non-contact communication, the reader / writer is not necessary and only the non-contact communication device may be used.

Although a card-shaped data carrier is used in the above-mentioned embodiment, the present invention is not limited to this, and can be applied to other-shaped data carriers such as coins.

[0095]

As described above, according to the present invention, since the switching means for switching the transmission / reception state is provided inside the reader / writer, there is no adverse effect of external noise unlike the conventional proposals, and therefore an appropriate switching operation can be performed. The operation reliability can be improved. Further, the transmission rate of the signal from the contactless communication interface to the data carrier interface and the transmission rate of the signal from the data carrier interface to the contactless communication interface are the same, and the signal received from the contactless communication interface is the data carrier interface. The command message is directly input to the data carrier via the data carrier, and the response message output from the data carrier is directly transmitted from the contactless communication interface to the external device or the external reader / writer body via the data carrier interface. . Therefore, the contact-type programs that have been commonly used in the past can be used basically. Therefore, the program development is easy and the development burden is small, and it can be applied by simply improving the existing external device or external reader / writer body. It has features such as possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a cashless shopping system according to an embodiment of the present invention.

FIG. 2 is a POS terminal, reader / writer, and I in the embodiment.
It is a figure showing the processing flow between C cards.

FIG. 3 is a diagram showing a format of a command message and a response message.

FIG. 4 is a diagram showing a processing flow among a POS terminal, a reader / writer, and an IC card when paying a price using a card case.

FIG. 5 is a configuration diagram of a reader / writer.

FIG. 6 is a diagram showing a processing flow of a reader / writer.

FIG. 7 is a configuration diagram of a card case.

FIG. 8 is a diagram showing a processing flow of a card case.

FIG. 9 is a diagram showing a processing flow of a card case.

FIG. 10 is a diagram showing a processing flow of a card case.

11 is a diagram showing a detailed flow of a determination process of S50 and S53 in FIG.

12 is a diagram showing an alternative process flow of FIG.

13 is a diagram showing an alternative processing flow of FIG.

FIG. 14 is an external view of a card case.

FIG. 15 is a diagram showing a schematic processing flow of a POS terminal.

FIG. 16 is a diagram showing another embodiment in which the functions of the POS terminal and the reader / writer are different from each other.

FIG. 17 is a diagram showing another embodiment in which the functions of the POS terminal and the reader / writer are different from each other.

FIG. 18 is a system configuration diagram of still another embodiment.

FIG. 19 is a configuration diagram of a reader / writer used in the system.

FIG. 20 is a diagram showing a processing flow between the POS terminal, the reader / writer, and the IC card when the IC card is directly inserted into the reader / writer to pay the price in this system.

FIG. 21 is a diagram showing a processing flow among a POS terminal, a reader / writer, and an IC card showing still another embodiment.

FIG. 22 is a configuration diagram of a reader / writer according to another embodiment.

FIG. 23 is a configuration diagram of a reader / writer according to still another embodiment.

FIG. 24 is a diagram showing a processing flow of a POS terminal, a reader / writer, a store IC card, and a user IC card when using the reader / writer.

FIG. 25 is a diagram showing a processing flow of a POS terminal, a reader / writer, a store IC card, and a user IC card according to another embodiment.

[Explanation of symbols]

1 IC card 2 Card case-shaped reader / writer with contactless communication function (card case) 3 Reader / writer with contactless communication function (reader / writer) 4 POS terminal 5 Microprocessor 6 ROM 7 RAM 8 Timer 9 Interface with POS terminal 10 power control circuit 11 serial communication interface 12 response switch (SW2) 13 demodulation circuit 14 light receiving circuit 15 command switch (SW3) 16 modulation circuit 17 light emitting circuit 18 IC card interface 19 contact-contactless switch (SW1) 20 reception-transmission Changeover switch (SW4) 21 Microprocessor 22 ROM 23 RAM 24 Timer 25 Battery voltage detection circuit 26 Power supply control circuit 27 Liquid crystal driver controller 28 Liquid crystal display device Device (LCD) 29 Key control circuit 30 Key 31 Serial communication interface 32 Reception-transmission changeover switch (SW8) 33 Command switch (SW6) 34 Demodulation circuit 35 Light receiving circuit 36 Response switch (SW7) 37 Modulation circuit 38 Light emitting circuit 39 Contact- Non-contact changeover switch (SW5) 40 IC card interface 50 IC card for shop 51 IC card interface for shop

Claims (9)

[Claims] 1. A reader / writer having a data carrier interface connected to a data carrier and a contactless communication interface capable of communicating with an external device in a contactless state, wherein a signal received from the contactless communication interface is One transmission path that is transmitted as it is as a command message to the data carrier via the data carrier interface, and the response message output from the data carrier is directly transmitted to the external device from the contactless communication interface via the data carrier interface. A signal from the contactless communication interface to the data carrier interface, comprising switching means for monitoring the status of the command message and the response message on the transmission path and switching the transmission / reception status to the external device and the data carrier. A transmission rate, a reader-writer, characterized in that the transmission speed of the signals from the data carrier interface to the non-contact communication interface to the same. 2. A reader / writer having a data carrier interface connected to a data carrier and a contactless communication interface capable of communicating with an external reader / writer body in a contactless state, wherein a signal received from the contactless communication interface is used. Is transmitted as a command message as it is to the data carrier via the data carrier interface, and a response message output from the data carrier is transmitted as it is from the contactless communication interface to the external reader / writer body via the data carrier interface. And a switching means for monitoring the status of the command message and the response message on the transmission path and switching the transmission / reception status to / from the external reader / writer body and the data carrier. Writer to the the transmission rate of the signal to the data carrier interface, characterized in that the transmission speed of the signals from the data carrier interface to the non-contact communication interface to the same. 3. The reader / writer according to claim 1 or 2, further comprising a display unit capable of displaying a state before data processing and / or a state after data processing for the data carrier. 4. The reader / writer according to claim 1, further comprising communication start instruction means for instructing start of communication with an external device via the non-contact communication interface. 5. The reader / writer according to claim 2, further comprising communication start instruction means for instructing start of communication with the external reader / writer main body via the non-contact communication interface. 6. The communication system according to claim 4, further comprising data carrier detecting means for detecting that the data carrier is connected, and when a communication start instruction message is output from the communication start instruction means, communication with an external device is performed. And a control unit for controlling to exchange a message with the data carrier when the detection signal of the data carrier is output by the data carrier detection means. 7. The external reader / writer main body according to claim 5, further comprising a data carrier detecting unit that detects that the data carrier is connected, and when the communication start instructing message is output from the communication start instructing unit. The reader / writer is characterized in that the reader / writer controls the communication of the data carrier and exchanges a message with the data carrier when a detection signal of the data carrier is output by the data carrier detecting means. 8. The reader / writer according to claim 2, wherein the reader / writer has a storage portion for storing a card-shaped data carrier and is portable. 9. The reader / writer according to claim 1, wherein a plurality of the data carrier interfaces are provided, and information can be exchanged between the connected data carriers.