JP2004252499A - Reader/writer and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reader/writer which can be converted into both protocols of block transmission and character transmission. <P>SOLUTION: The reader/writer performing relay communication between a high-order terminal and an IC card is provided with a decision means deciding whether the installed IC card is a first type IC card performing communication based on a first protocol of character transmission or a second type IC card performing communication based on a second protocol of block transmission, a first conversion communication means converting data to the respective protocols and performing relay communication between the high-order terminal performing communication based on a third protocol of block transmission, which differs from the second protocol, and the first type IC card, a second conversion communication means converting data to the respective communication rules and performing relay communication between the high-order terminal and the second type IC card and a switching means making the first conversion communication means or the second conversion communication means perform communication based on a decision result of the decision means. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an IC card reader / writer device for an upper terminal such as a personal computer to communicate with an IC card.
[0002]
[Prior art]
The IC card reader / writer mediates communication between the IC card and the computer. The IC card reader / writer and the IC card exchange data according to a common protocol.
Conventionally, an IC card reader / writer communicates with an IC card based on one type of protocol, and cannot communicate with an IC card that communicates based on a different protocol.
[0003]
Therefore, when a computer communicates with a plurality of IC cards that communicate according to different protocols, it is necessary to prepare an IC card reader / writer that operates according to a common protocol as the protocol of each IC card. That is, when a plurality of IC cards communicate based on different protocols, it is necessary to prepare an IC card reader / writer capable of handling each of them.
[0004]
Therefore, in Patent Document 1, there is an IC card reader / writer having communication control means for enabling communication with an IC card based on a plurality of different protocols, and is used for communication with the IC card. A technique relating to an IC card reader / writer having a protocol switching means for controlling the communication control means so as to switch a protocol to another protocol is disclosed.
[0005]
According to this technology, (1) a protocol is selected according to a signal from the IC card reader / writer itself or a host computer, and a plurality of IC cards each having a different protocol or one IC card is used by one reader / writer. It is possible to access a device having a plurality of protocols, and (2) to switch the protocol during a session with an IC card, for example, from a byte transmission type protocol to a block transmission type. By switching to this protocol, data transmission efficiency can be improved.
[0006]
[Patent Document 1] Japanese Patent Application Laid-Open No. 4-42383
[0007]
[Problems to be solved by the invention]
However, the communication protocol of the IC card includes a block transmission called T = 1 and a character transmission called T = 0 in the communication protocol described in the international standard ISO7816 part 3, and the IC card reader / writer uses the above technology to perform the block transmission. Although it is possible to switch to a different protocol according to the communication protocol, it is not possible to switch to a communication protocol for character transmission.
[0008]
This is because block transmission and character transmission differ not only in the configuration of communication data but also in data transmission processing and error detection processing. Communication with an IC card that performs communication based on block transmission is different from block transmission and character transmission. This is because an IC used in an IC card reader / writer cannot be used for communication with an IC card that performs communication based on character transmission.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide an IC card reader / writer which can be converted into both a block transmission called T = 1 and a character transmission called T = 0.
[0010]
[Means for Solving the Problems]
In order to solve the above object, a reader / writer device to which an upper terminal is connected, an IC card is mounted, and relays information between the IC card and the upper terminal is performed, wherein the mounted IC card is A first type IC card that performs communication based on a first communication protocol that defines a communication procedure for character transmission, or a second type IC that performs communication based on a second communication protocol that defines a communication procedure for block transmission A determination unit for determining whether the card is a card; the upper terminal that performs communication based on a third communication protocol that defines a communication procedure for block transmission different from the second communication protocol; A first conversion communication unit that converts data according to the respective communication protocol and relays communication with the first type IC card that performs the communication, and performs an upper communication that performs communication based on the third communication protocol. A second conversion communication means for converting data between the terminal and the second type IC card performing communication based on the second communication protocol according to the respective communication protocol and relaying the communication; Switching means for causing any one of the first conversion communication means and the second conversion communication means to perform communication based on a determination result of the means.
[0011]
Thereby, it is possible to convert to both block transmission and character transmission.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a communication system 600 according to an embodiment of the present invention will be described.
1. Configuration of communication system 600
As shown in FIG. 1, the communication system 600 includes a PC 100 (personal computer), a reader / writer 200, and IC cards 300, 400, and 500.
[0013]
The PC 100 performs communication based on the communication protocol C. The communication protocol C is a communication protocol for block transmission called T = 1 described in International Standard ISO 7816 Part 3. The data structure of the communication protocol C will be described in 1.2.6 (6).
The IC cards 300 to 500 are detachable from the reader / writer 200, and one of the IC cards 300 to 500 is connected to the reader / writer 200. The IC card 300 performs communication based on the communication protocol A. The communication protocol A is a communication protocol for block transmission different from the communication protocol C. Similarly, the IC card 400 performs communication based on the communication protocol B, and the IC card 500 performs communication based on the communication protocol C. The communication protocol B is a communication protocol for character transmission called T = 0 described in International Standard ISO 7816 Part 3. The data structure of the communication protocol B will be described in 1.2.6 (9).
[0014]
The reader / writer 200 is electrically connected to the PC 100. When transmitting data from the PC 100 to any of the IC cards 300 to 500, the reader / writer 200 converts the data according to the communication protocol of each IC card, and converts the response data from each IC card into the communication protocol of the PC 100. Inverse conversion according to.
Hereinafter, the configuration of the reader / writer 200 will be described.
1.1 Reader / Writer 200
The reader / writer 200 communicates with the PC 100 based on the communication protocol C, and the reader / writer 200 communicates with the connected IC card based on the communication protocol A, B, or C.
[0015]
The reader / writer 200 includes a first storage unit 210, a communication protocol control unit 220, a central processing unit 230, a card detection unit 240, a first input / output unit 250, and a second input / output unit 260.
Hereinafter, each configuration will be described.
1.1.1 First Input / Output Unit 250
The first input / output unit 250 is physically connected to the PC 100. The first input / output unit 250 performs input / output of information with the PC 100 based on the communication protocol C.
[0016]
1.1.2 Second input / output unit 260
The second input / output unit 260 is physically connected to the IC card. When the IC card 300 is connected, the second input / output unit 260 inputs and outputs information to and from the IC card 300 based on the communication protocol A. When the IC card 400 or 500 is connected, information is input / output with the IC card 400 based on the communication protocol B or with the IC card 500 based on the communication protocol C, respectively.
[0017]
1.1.3 Card Detection Unit 240
The card detection unit 240 detects whether any of the IC cards 300 to 500 is physically connected to the reader / writer 200 and is in a communicable state. It outputs a detection signal indicating whether any of the IC cards 300 to 500 has been detected.
1.1.4 First Storage Unit 210
The first storage unit 210 stores information processed in the reader / writer 200.
[0018]
1.1.5 Central processing unit 230
When the data received by the first communication unit 222 from the PC 100 is a command to be processed in the reader / writer 200, the central processing unit 230 executes the program stored in the second storage unit 211 according to the command.
1.1.6 Communication Protocol Control Unit 220
The communication protocol control unit 220 includes a second storage unit 211, a peripheral control unit 221, a first communication unit 222, an initial response analysis unit 223, a first communication protocol conversion unit 224, a second communication unit 225, and a second communication protocol conversion unit. 226, a third communication unit 227, a communication path control unit 228, and a type storage unit 229.
Hereinafter, each configuration will be described.
(1) Second storage unit 211
The second storage unit 211 stores a program describing a process performed in the reader / writer 200.
(2) Type storage unit 229
The type storage unit 229 stores the type of the communication protocol received from the initial response analysis unit 223. The type takes one of the values “A”, “B” or “C”. “A” indicates the communication protocol A. Similarly, “B” indicates the communication protocol B, and “C” indicates the communication protocol C.
When the card is not connected, the type is not stored.
(4) Peripheral control unit 221
The peripheral control unit 221 determines whether data has been received from the PC 100 via the first input / output unit 250.
[0019]
(A1) When data is not received, a detection signal output by the card detection unit 240 is received. It is determined from the received detection signal whether any of the IC cards 300 to 500 has been detected.
(B1) When the detection signal indicates that the IC card has been detected, it is determined whether or not the type of the communication protocol is stored in the type storage unit 229. If the type is not stored in the type storage unit 229, the initial response analysis unit 223 is made to determine the type.
[0020]
(B2) If the detection signal indicates that the IC card has not been detected, or if it indicates that the IC card has been detected, and the type is stored in the type storage unit 229, Repeat the operation.
(A2) When data is received from the PC 100, the control is transferred to the first communication unit.
(5) Initial response analyzer 223
When the IC card 300 is connected to the reader / writer 200, the initial response analysis unit 223 activates the IC card 300 by a method described in the international standard ISO (ISO7816 part 2).
[0021]
An ATR (Answer To Reset) is received from the activated IC card 300 via the second input / output unit 260. The ATR is attribute information relating to the electrical / transmission protocol information of the IC card 300. The attribute information includes the type of the communication protocol of the IC card 300. The initial response analysis unit 223 analyzes the received ATR and determines the type of the communication protocol.
[0022]
If the type of the determined communication protocol is the communication protocol A, the initial response analysis unit 223 writes the value of “A” into the type storage unit 229.
The ATR is similarly analyzed when the IC card 400 or the IC card 500 is connected, and the value of “B” is stored when the type is the communication protocol B, and the value of “C” is stored when the type is the communication protocol C. Write to the section 229.
(6) First communication unit 222
The first communication unit 222 performs communication with the PC 100 according to the communication protocol C.
[0023]
Here, the configuration of the transmission data of the communication protocol C, which is the communication protocol of the block transmission, will be described with reference to FIG. The transmission data defined by the communication protocol C includes NAD, PCB, and LEN, which are header information, CLS, COD, P1, P2, and P3, which are communication blocks, a data section, and EDC.
The NAD stores the sender and receiver addresses of the data. The PCB stores information as to whether the next block exists as a series of information or a retransmission process of a communication block. LEN stores the length information of the communication block.
[0024]
The CLS stores information indicating the type of a communication block. The COD stores an instruction intended by the upper terminal. P1, P2 and P3 store additional information associated with the instruction. The data section stores actual data to be commanded.
The EDC stores header information and a check code for confirming the integrity of the communication block.
[0025]
As described above, the block transmission is a communication protocol for transmitting and receiving all such information as one block.
The first communication unit 222 receives data transmitted from the PC 100 via the first input / output unit 250 upon activation from the peripheral control unit 221.
It is determined whether there is a next block in the data to be received, and if so, the next block is received.
[0026]
When the data reception is completed, it is determined whether there is a communication error. If there is a communication error, a retransmission request is transmitted to PC 100. If there is no communication error, the header information of the received data is analyzed to confirm the destination of the received data. When the destination of the received data is the reader / writer 200, the processing is performed in the reader / writer 200, and the processing result is transmitted to the PC 100.
[0027]
When the destination of the reception data is any of the IC cards 300 to 500, the detection signal output from the card detection unit 240 is received. If the detection signal indicates that none of the IC cards 300 to 500 has been detected, a response indicating a processing error is created and sent to the PC 100 via the first input / output unit 250. When the detection signal indicates that any of the IC cards 300 to 500 has been detected, the type of the communication protocol stored in the type storage unit 229 is read. If the read type is “A”, the process proceeds to the second communication protocol conversion unit 226. Similarly, if the read type is “B”, the process proceeds to the first communication protocol conversion unit 224, and if the read type is “C”, the process proceeds to the communication channel control unit 228.
[0028]
The first communication unit 222 transmits the response data of the IC card 300 or 400 output by the first communication protocol conversion unit 224 or the second communication protocol conversion unit 226 to the PC 100.
(7) Third communication unit 227
The third communication unit 227 communicates with the IC card 300 according to the communication protocol A shown in FIG.
[0029]
The communication protocol A is a communication protocol for block transmission different from the communication protocol C. The data structure of the communication protocol A is the same as the data structure of the communication protocol C. The communication protocols C and A have different PCB configurations.
The third communication unit 227 transmits data received from the second communication protocol conversion unit 226 to the IC card 300. Further, when data is received again from the second communication protocol conversion unit 226, the data is transmitted again.
[0030]
The third communication unit 227 outputs the response data received from the IC card 300 to the second communication protocol conversion unit 226.
(8) Second communication protocol conversion unit 226
The second protocol conversion unit 226 converts data based on the protocol C into data based on the protocol A. In addition, data based on the communication protocol A is inversely converted into data based on the communication protocol C.
[0031]
Since only the PCB is different from the communication protocols A and C, the second communication protocol conversion unit 226 includes a conversion table for converting or reverse-converting the PCB.
When receiving the received data from the PC 100 from the first communication unit 222, the second communication protocol conversion unit 226 converts the PCB of the received data based on the communication protocol C into a PCB based on the communication protocol A according to the conversion table. The received data obtained by converting the PCB into data based on the communication protocol A is output to the third communication unit 227. In addition, the presence or absence of a communication error from the IC card 300 is confirmed. If there is a communication error, the received data is output to the third communication unit again. If there is no communication abnormality, the PCB of the response data from the IC card 300 received from the third communication unit 227 is inversely converted into a PCB based on the communication protocol C according to the conversion table. Response data obtained by inversely converting the PCB into data based on the communication protocol C is output to the first communication unit 222.
(9) Second communication unit 225
The second communication unit 225 communicates with the IC card 400 according to the communication protocol B.
[0032]
Here, the data structure of the communication protocol B, which is the communication protocol for character transmission, will be described with reference to FIG.
The data of the communication protocol B is composed of a communication block including a parameter part including CLS, COD, P1, P2, and P3 and a data part, and has no header information and EDC.
[0033]
As described above, character transmission is a communication protocol for transmitting and receiving such information in byte units.
The second communication unit 225 receives the data of the parameter part of the received data received from the PC 100 from the first communication protocol conversion unit 224, and transmits the received data to the IC card 400 in byte units. When the data of the parameter section is received again from the first communication protocol conversion section 224, the received data is transmitted to the IC card 400 again.
[0034]
The second communication unit 225 receives the data of the data portion of the received data from the first communication protocol conversion unit 224, and transmits the received data to the IC card 400 in byte units. When the data of the data section is received again from the first communication protocol conversion unit 224, the received data is transmitted to the IC card 400 again.
The second communication unit 225 receives the response data from the IC card 400. The received response data is output to the first communication protocol conversion unit 224.
(10) First communication protocol conversion unit 224
The first communication protocol conversion unit 224 converts data based on the communication protocol C into data based on the communication protocol B. In addition, data based on the communication protocol B is inversely converted into data based on the communication protocol C.
[0035]
The first communication protocol conversion unit 224 divides the data received from the PC 100 into a parameter part of the CLS, COD, P1, P2, and P3 commands, and a subsequent data part. The first communication protocol conversion unit 224 outputs the data of the divided parameter unit to the second communication unit 225. The presence or absence of a communication error is confirmed, and if there is a communication error, the data is output to the second communication unit 225 again.
[0036]
The first communication protocol conversion unit 224 receives the response data of the IC card 400 from the second communication unit 225. It is determined whether or not the response data is an ACK (ACKnowledgement) indicating acceptability. If the response data is other than ACK, the data of the parameter section is output to the second communication section 225 again.
If the response data from IC card 300 is ACK and the data received from PC 100 has a data part, first communication protocol conversion part 224 outputs the data of the data part to second communication part 225.
[0037]
The first communication protocol conversion unit 224 checks whether there is a communication error. If there is a communication error, the data is output to the second communication unit 225 again.
When there is no communication abnormality, the first communication protocol conversion unit 224 generates a PCB based on the communication protocol C by reflecting the response data from the IC card 400. The response data including the generated PCB is output to the first communication unit 222.
(11) Communication path control unit 228
When the communication protocol of the IC card 500 is the communication protocol C, the communication path control unit 228 sends the data transmitted from the PC 100 directly to the IC card 500 without passing through the internal processing of the reader / writer 200. The response data transmitted from the IC card 500 is transmitted to the PC 100.
2. Operation of communication system 600
The PC 100 transmits data to the reader / writer 200 according to the communication protocol C. The reader / writer 200 converts the received data according to the communication protocol of the destination IC card and transmits the converted data.
[0038]
Hereinafter, the operation of the reader / writer 200 will be described.
2.1 Operation of Reader / Writer 200
(1) Operation of peripheral control unit 221
The operation of the peripheral control unit 221 will be described with reference to FIG.
The peripheral control unit 221 determines whether or not data has been received from the PC 100 via the first input / output unit 250 (Step S10). If data has not been received (NO in step S10), a detection signal is received from card detection section 240 (step S11). It is determined from the received detection signal whether any of the IC cards 300 to 500 has been detected (step S12). When the detection signal indicates that the detection has been performed (YES in step S12), it is determined whether or not the type is stored in the type storage unit 229 (step S13). When the type is not stored (NO in step S13), the initial response analyzing unit 223 is made to determine the type (step S14). If the detection signal indicates no detection (NO in step S12) and if the type is stored (YES in step S13), it is determined again whether data has been received from PC 100 (step S13). Step S10).
[0039]
When data is received from PC 100 (YES in step S10), control is transferred to first communication unit 222 (step S14).
(2) Operation of initial response analysis unit 223
The operation of the initial response analyzer 223 in step S13 in FIG. 3 will be described with reference to FIG.
[0040]
The initial response analysis unit 223 activates the connected IC card (Step S20). When the ATR is received from the activated IC card via the second input / output unit 260, the type of the communication protocol of the IC card connected from the received ATR is determined (step S21). If the type is the communication protocol A, “A” is written into the type storage unit 229 (step S22). Similarly, when the type is the communication protocol B, “B” is written in the type storage unit 229 (step S23), and when the type is the communication protocol C, “C” is written in the type storage unit 229 (step S24). .
(3) Operation of first communication unit 222
The operation of the first communication unit 222 in step S14 of FIG. 3 will be described with reference to FIGS.
[0041]
When activated by the peripheral control unit 221, the first communication unit 222 receives data transmitted from the PC 100 via the first input / output unit 250 (step S30). It is determined whether there is a next block (step S31), and if there is (YES in step S31), the next block is received (step S30). If there is no next block (NO in step S31), it is determined whether there is a communication error (step S32). If there is a communication error (YES in step S32), a retransmission request is transmitted to PC 100 (step S33). If there is no communication abnormality (NO in step S32), the header information of the received data is analyzed, and the destination of the data is confirmed (step S34). When the data transmission destination is the reader / writer 200, the process is performed in the reader / writer 200 (step S35), and the result is transmitted to the PC 100 (step S44). If the data transmission destination is one of the IC cards 300 to 500, a detection signal is received from the card detection unit 240 (step S36). It is determined whether or not the received detection signal indicates that any of the IC cards 300 to 500 has been detected (step S37). If the detection signal indicates that no detection has been made (NO in step S37), an abnormal processing response is created (step S38), and the created abnormal processing response is transmitted to the PC 100 (step S44). When the detection signal indicates the detection (YES in step S37), the type of the communication protocol stored in the type storage unit 229 is read (step S39), and it is determined which communication protocol is used (step S40). If it is the communication protocol B, the control is transferred to the first communication protocol conversion unit 224 (step S41). Similarly, if it is the communication protocol A, the process is transferred to the second communication protocol conversion unit 226 (step S42), and if it is the communication protocol C, the process is transferred to the communication channel control unit 228 (step S43).
[0042]
The response data output by the first communication protocol conversion unit 224 or the second communication protocol conversion unit 226 is transmitted to the PC 100 (step S44).
(4) Operation of first communication protocol conversion unit 224
The operation of the first protocol conversion unit 224 in step S41 of FIG. 6 will be described with reference to FIG.
[0043]
Upon receiving the data received from the PC 100 from the first communication unit 222, the first communication protocol conversion unit 224 divides the data into a parameter part and a data part of CLS, COD, P1, P2, and P3 commands (step S50). The data of the divided parameter section is output to the second communication section 225 for transmission to the IC card 400 in byte units (step S51).
[0044]
It is checked whether there is a communication error from the IC card 400 (step S52). If there is a communication error (YES in step S52), the data of the parameter unit is output to the second communication unit 225 for retransmission (step S51). .
If there is no communication abnormality (NO in step S52), it is determined whether or not the response data of IC card 400 received from second communication unit 225 is ACK (step S53). If the response data is not ACK (NO in step S53), the data of the parameter section is output to second communication section 225 so as to be transmitted again (step S51). If the response data is ACK (YES in step S53), it is determined whether or not the data received from PC 100 has a data portion (step S54). If the data section does not exist (NO in step S54), a PCB for returning to the PC 100 is generated (step S57).
[0045]
If the data received from the PC 100 has a data portion (YES in step S54), the data in the data portion is output to the second communication portion 225 for transmission to the IC card 400 in byte units (step S55).
It is confirmed whether or not there is a communication error with respect to the transmitted data portion (step S56). If there is a communication error (YES in step S56), the data of the data portion is output to the second communication portion 225 to transmit again (step S55). . If there is no communication abnormality (NO in step S56), a PCB for returning to the PC 100 is generated by reflecting the response data received from the IC card 400 (step S57). The response data including the generated PCB is output to the first communication unit 222 for transmission to the PC 100. (Step S58)
(5) Operation of second communication protocol conversion unit 226
The operation of the second protocol conversion unit 226 in step S42 of FIG. 6 will be described with reference to FIG.
[0046]
When receiving the data received from the PC 100 from the first communication unit 222, the second communication protocol conversion unit 226 converts the PCB of the received data into a PCB based on the communication protocol A according to the conversion table (step S60). The received data obtained by converting the PCB into data based on the communication protocol A is output to the third communication unit 227 for transmission to the IC card 300 (step S61).
[0047]
It is confirmed whether or not there is a communication error from the IC card 300 (step S62). If there is a communication error (YES in step S62), the received data is output to the third communication unit 227 so as to be retransmitted (step S61).
If there is no communication abnormality (NO in step S62), the PCB of the response data from IC card 300 is inversely converted into a PCB of communication protocol C based on the conversion table (step S63). The response data including the inversely converted PCB is output to the first communication unit 222 (step S64).
[0048]
【The invention's effect】
As described above, the present invention relates to a reader / writer device to which a higher-level terminal is connected, an IC card is mounted, and relay communication of information is performed between the IC card and the higher-level terminal. Is a first type IC card that performs communication based on a first communication protocol that defines a communication procedure for character transmission, or a second type that performs communication based on a second communication protocol that defines a communication procedure for block transmission Determining means for determining whether the card is a seed IC card; the upper terminal that performs communication based on a third communication protocol that defines a communication procedure for block transmission different from the second communication protocol; A first conversion communication means for converting data in accordance with the respective communication protocol and relaying communication with the first type IC card which performs communication based on the third communication protocol; A second conversion communication unit that converts data according to the respective communication protocol and relays the communication between the host terminal and the second type IC card that performs communication based on the second communication protocol; A reader / writer device comprising: a switching unit that causes one of the first conversion communication unit and the second conversion communication unit to perform communication based on a determination result of the determination unit.
[0049]
According to this configuration, one port of the microcomputer mounted on the terminal is used and software is used, so the reader / writer device can switch to both the block transmission protocol and the character transmission protocol Thus, there is no need to control the upper terminal in consideration of the communication protocol, and there is an effect that the processing at the upper terminal can be simplified. In addition, since the block transmission and the character transmission can be controlled by software, the processing in the terminal can be flexibly performed.
[0050]
Here, when relaying communication between a third-type IC card that performs communication based on the third communication protocol and the higher-level terminal, the reader / writer device transmits data received from the higher-level terminal to the reader. Communication path switching means for transmitting data to the third type IC card without conversion in the writer device and transmitting data received from the third type IC card to the upper terminal without conversion in the reader / writer device The determination means determines whether the mounted IC card is the first type IC card, the second type IC card, or the third type IC card, and the switching means When the determination result is the third type IC card, the communication path switching means may perform communication.
[0051]
According to this configuration, when the communication protocol of the IC card is the same as the communication protocol of the upper terminal, the communication is performed without processing in the reader / writer device, so that the communication time can be reduced and the third IC card is also supported. I can do it.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an IC card reader / writer.
FIG. 2 shows a data configuration of block transmission and character transmission.
FIG. 3 is a flowchart showing an operation of a peripheral control unit 221.
FIG. 4 is a flowchart illustrating an operation of an initial response analysis unit 223;
FIG. 5 is a flowchart illustrating an operation of a first communication unit 222; Continued to FIG.
FIG. 6 is a flowchart showing an operation of the first communication unit 222. Continuation of FIG.
FIG. 7 is a flowchart showing an operation of the first communication protocol conversion unit 224.
FIG. 8 is a flowchart illustrating an operation of a second communication protocol conversion unit 226;
[Explanation of symbols]
100 PC
200 reader / writer
210 storage unit
211 Storage unit
220 communication protocol control unit
221 Peripheral control unit
222 communication unit
223 Initial response analyzer
224 Communication protocol conversion unit
225 Communication unit
226 Communication Protocol Conversion Unit
227 Communication unit
228 Communication path control unit
229 Type storage unit
230 central processing unit
240 Card Detector
250 input / output unit
260 Input / output unit
300, 400, 500 IC card
600 communication system

Claims (3)

A reader / writer device to which an upper terminal is connected, an IC card is mounted, and information relay communication is performed between the IC card and the upper terminal.
The mounted IC card is a first-class IC card that performs communication based on a first communication protocol that defines a communication procedure for character transmission, or based on a second communication protocol that defines a communication procedure for block transmission. Determining means for determining whether the card is a second type IC card for communication;
The upper terminal that performs communication based on a third communication protocol that defines a communication procedure of block transmission different from the second communication protocol, and the first type IC card that performs communication based on the first communication protocol. A first conversion communication unit that converts data according to each communication protocol and relays the communication between
Data is converted between the upper-level terminal that performs communication based on the third communication protocol and the second-type IC card that performs communication based on the second communication protocol, in accordance with each communication protocol. Second conversion communication means for relaying communication;
A reader / writer device, comprising: switching means for causing any one of the first conversion communication means and the second conversion communication means to perform communication based on a result of the determination by the determination means. The reader / writer device,
When relaying communication between the third type IC card that performs communication based on the third communication protocol and the upper terminal, data received from the upper terminal is converted without being converted in the reader / writer device. Communication path switching means for transmitting data to the third type IC card and receiving data from the third type IC card to the upper terminal without converting the data in the reader / writer device;
The determining means determines whether the mounted IC card is the first type IC card, the second type IC card, or the third type IC card,
2. The reader / writer device according to claim 1, wherein the switching unit causes the communication path switching unit to perform communication when the determination result is the third type IC card. A communication system in which a higher-level terminal is connected and a reader / writer device having an IC card mounted thereon performs relay communication of information between the higher-level terminal and the IC card,
A first-class IC card that communicates with the reader / writer device based on a first communication protocol that defines a communication procedure for character transmission;
A second type IC card that communicates with the reader / writer device based on a second communication protocol that defines a communication procedure for block transmission;
The higher-level terminal that communicates with the reader / writer device based on a third communication protocol that defines a communication procedure of block transmission different from the second communication protocol,
Comprising the reader / writer device,
The reader / writer device,
A first communication unit, a first conversion unit, a second conversion unit, a second communication unit, a third communication unit, and an input / output unit;
The first communication means,
It communicates with the upper terminal based on the third communication protocol, and when the first type IC card is attached to the reader / writer device, outputs received data from the upper terminal to the first conversion means. Outputting the received data to the second conversion means when the second type IC card is mounted, and transmitting data received from the first conversion means or the second conversion means to the upper terminal;
The first conversion means includes:
The data received from the third communication means is converted into data based on the first communication protocol, the converted data is output to the second communication means, and the data received from the second communication means is converted into the third communication protocol. And outputs the data to the first communication means.
The second conversion means,
The data received from the first communication unit is converted into data based on the first communication protocol, the converted data is output to the second communication unit, and the data received from the second communication protocol is converted into the third communication protocol. And outputs the data to the first communication means.
The second communication means,
The first communication protocol is communicated with the first type IC card, data received from the first conversion means is output to the input / output means, and data received from the input / output means is converted to the first conversion means. Output to
The third communication means,
Communicates with the second type IC card based on the second communication protocol, outputs data received from the second conversion means to the input / output means, and outputs data received from the input / output means to the second conversion means Output to
The input / output unit transmits data received from the second communication unit to the first type IC card, outputs data received from the first type IC card to the second communication unit, and outputs the data from the third communication unit. A communication system comprising: transmitting received data to the second type IC card; and outputting data received from the second type IC card to the third communication unit.

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