JP4412163B2 - Non-contact type IC card reader / writer system and reader / writer - Google Patents

Description

  The present invention relates to a non-contact type IC card reader / writer system including a reader / writer for reading / writing data from / to a non-contact type IC card, and a reader / writer constituting the system.

  Non-contact type IC cards (hereinafter abbreviated as IC cards) are used for various purposes such as PC security management and payment processing. In recent years, data has been read from and written to these IC cards and IC cards. Reader / writers are sold. The non-contact type reader / writer communicates with the IC card by electromagnetic coupling, modulates the transmission signal at the time of transmission, communicates power, supplies power to the IC card, and receives signals modulated by the IC card to perform communication processing Has been done.

  An example of such an IC card standard is a standard called ISO / IEC14443. In the ISO / IEC14443 standard, the modulation degree standard is different for each type referred to as Type A (Type A), Type B (Type B), etc., and a reader / writer compliant with this standard is type A from the reader / writer side. And it is necessary to poll alternately for type B cards. As an example of a non-contact type IC card, there is a technique for establishing a communication link between a smart card and a computer using a plurality of smart card communication protocols (see, for example, Patent Document 1).

By the way, there is a demand to extend this standard as follows. This is because the reader / writer establishes a communication link with a different card type IC card while maintaining the communication link after establishing a communication link with a certain card type IC card based on a predetermined procedure after polling, This means that you want to maintain communication links with cards of multiple card types. If such a process can be realized, the communication link process with the card type that has been previously linked with the card type can be omitted, and transactions can be suppressed.
Special table 2003-502888

  If you try to maintain multiple communication links, the communication link that has already been established may be disconnected, the stored contents stored in the IC card may be reset, or the operation of the IC card may be locked. A problem may occur.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a non-contact type IC card reader / writer system capable of suppressing the communication link disconnection previously established when establishing a plurality of communication links, and It is to provide a reader / writer used in this system.

According to invention of Claim 1, there exists the following effect | action. The management device includes storage means. This storage means supports a plurality of parameters defined for at least one communication method among a modulation method, a modulation degree, and a communication speed when a communication link is simultaneously established between one and another non-contact type IC card. Thus, the number of continuous successes and the number of continuous failures when the simultaneous communication link processing is tried are stored.

At this time, since the management device establishes a communication link between one and other non-contact type IC cards based on the simultaneous link availability information stored in the storage means, for example, the continuous success in the simultaneous link availability information is successful. By adopting a parameter with a large number of times and attempting simultaneous communication link processing, it is possible to suppress disconnection of already established communication links when establishing a plurality of communication links. The invention described in claim 7 shows the invention of a reader / writer having the function of the non-contact type IC card reader / writer system described in claim 1.

  According to the second aspect of the present invention, the management apparatus establishes a communication link with one IC card, attempts to establish a communication link with another IC card, and then establishes a communication link with the one IC card. In order to determine whether or not the communication link between the communication links is continued and update the simultaneous communication link availability result as the simultaneous link availability count information in the storage means, when a plurality of communication links are tried, It can be learned and stored as reference data when trying a communication link, and the reliability of simultaneous link availability information can be increased as the number of trials increases. The invention described in claim 8 shows the invention of a reader / writer having the function of the non-contact type IC card reader / writer system described in claim 2.

  According to the third aspect of the present invention, since the management device is connected to the external network, the simultaneous link availability count information can be transmitted to another management device. Thereby, for example, information can be shared with other management devices connected to the external network.

  According to the fourth aspect of the present invention, the management device tries the simultaneous communication links in the order in which the simultaneous communication links are likely to be successfully established with one and the other IC cards. A simultaneous communication link can be established with a higher probability than a configuration that performs simultaneous communication link processing. The invention described in claim 9 shows the invention of a reader / writer having the function of the non-contact type IC card reader / writer system described in claim 4.

According to the fifth aspect of the present invention, the management device is in a state in which the communication link with one IC card is disconnected, and the ratio of the number of continuous failures to the total number of trials in the simultaneous link availability count information is predetermined If a communication link is established with the other IC card by adopting a parameter exceeding the ratio and the communication link is established with the other IC card, the one and other When the simultaneous communication link process with the contact type IC card is tried , avoidance information indicating that the use of the parameter is avoided is communicated to the outside . For example, transmitting the avoidance information to the other management device or the host device, when the other management device or the host device receives the avoidance information, attempts simultaneous communication link process of the first and other IC card, avoidance Adoption of the parameters indicated in the information can be avoided, and traffic between the management device and other management devices can be suppressed. The invention described in claim 10 shows the invention of a reader / writer having the function of the non-contact type IC card reader / writer system described in claim 5.

According to invention of Claim 6, it acts as follows. Retry information storage means, when carrying out the retry simultaneous communication link process with the management device and the IC card stores a retry information indicating a success count and failure count of simultaneous communication links process for each parameter . Based on the retry information stored in the retry information storage means, the management device adopts a parameter in which the number of successes exceeds the number of failures, and performs simultaneous communication link processing between one and other non-contact type IC cards. When trying, even if the simultaneous communication link processing fails for the first time, retry is performed . Therefore, for example, even if the result of the first attempt is unsuccessful, if there is a condition where the retry is successful and there is a condition, the management apparatus may be able to simultaneously communicate with a plurality of IC cards, thereby improving convenience. The invention described in claim 11 shows the invention of a reader / writer having the function of the non-contact type IC card reader / writer system described in claim 6.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 schematically shows a configuration of a non-contact type IC card reader / writer system (hereinafter referred to as an IC card reader / writer system). This IC card reader / writer system A includes a reader / writer 2 and a personal computer 3 as a host device, and is connected by an external network N. The management device 1 includes a reader / writer 2 and a personal computer 3. Note that another management device (not shown) is connected to the external network N.

The electrical configuration of this configuration will be described below with reference to FIG. FIG. 2 is a block diagram showing the electrical configuration of this system.
The reader / writer 2 is mainly configured by a control circuit 6 having a CPU (not shown), and includes a modulator 7, a receiver 8, and an antenna coil 9. The control circuit 6 includes a memory 6a as storage means in addition to the CPU. The control circuit 6 can communicate with the computer 3 through the external network N. The memory 6a stores simultaneous link availability information. The simultaneous link availability information indicates an embodiment stored in the control circuit 6, but may be stored in a database (not shown) of the computer 3.

  For example, the simultaneous link availability count information indicates whether a communication link is continued with another type (for example, type B) IC card 5 after establishing a communication link with the type A IC card 4. The number information indicating the number of times the continuation can be continued, for example, is stored in a form as shown in FIG. The contents shown in FIG. 3 will be described later. The modulator 7 performs ASK modulation on the data supplied from the control circuit 6. Then, the data is transmitted to the IC cards 4 and 5 through the antenna coil 9.

On the other hand, since the hardware configuration of the type A IC card 4 and the type B IC card 5 is substantially the same, the hardware configuration of the IC card 4 will be described and the description of the hardware configuration of the IC card 5 will be omitted. The IC card 4 includes a control circuit 10 and an antenna coil 11. The control circuit 10 includes a CPU (not shown) and a memory 10a as data storage means. When a transmission signal is given from the reader / writer 2 through the antenna coil 11, the control circuit 10 drives the transmission signal as a power source.

  In the driving state where power is supplied, the control circuit 10 modulates the data stored in the memory 10a and transmits the data to the reader / writer 2 through the antenna coil 11, and conversely receives the data transmitted from the reader / writer 2. It is configured.

There is a standard called ISO / IEC14443 as a signal interface standard for a non-contact type IC card. In the ISO / IEC14443 standard, type A (TypeA) and type B (TypeB) are used as standard.
In the case of type A, the modulation method and modulation degree of data transmission from the reader / writer 2 to the type A IC card 4 are ASK 100%, and the encoding is performed in a modified mirror format. On the other hand, in the case of type B, the modulation method of data transmission from the reader / writer 2 to the type B IC card 5 is the same as type A and is ASK, but the modulation degree is different and is defined as 8% to 14%. In the case of Type B, the modulation degree is normally used at 10%.
In the case of Type B, the encoding is performed using the NRZ-L encoding method. The communication speeds of Type A and Type B are the same at the initial 106 kbps, and can be changed to 212 kbps, 424 kbps, and 847 kbps according to the setting parameter group.

  The reader / writer 2 intermittently transmits call codes to the type A and type B IC cards 4 and 5 in order to detect that the IC cards 4 and 5 approach the communication area of the reader / writer 2. When the polling processing is performed and the IC cards 4 and 5 are located in the communication area, the IC cards 4 and 5 operate based on the power for operation from the signal transmitted by the reader / writer 2 and respond by performing load modulation. It is supposed to be.

The communication method between the reader / writer 2 and the IC cards 4 and 5 is determined by the standard. For example, in a system based on ISO / IEC14443, as described above, the modulation method, the modulation degree, and the communication speed for each of the types A and B. Is defined so as to satisfy a condition within a predetermined range.

  However, in order to comply with the standard, a certain parameter group only needs to satisfy a predetermined range. Therefore, the reader / writer 2 manufacturer, the IC card 4 or 5 manufacturer, and the IC chip built in the IC card 4 or 5 Various regulations are made for each manufacturer (not shown) within the scope of the standard for each manufacturer.

  Consider an example in which company A sells an IC card 4 and company B sells an IC card 5. Then, for example, after the reader / writer 2 establishes a communication link with the IC card 4 manufactured by company A and performs data communication, the reader / writer 2 establishes a communication link with the IC card 5 manufactured by company B. However, when data communication is performed, there is an effect that different regulations are established within the standard range of each company. Therefore, a communication link establishment process is performed between the IC card 4 and the IC card 5 while holding the communication link. In this case, the data stored in the memory 10a of the IC card 4 may be reset or the operation of the IC card 4 may be locked, and the reader / writer 2 cannot hold the link between the IC cards 4 and 5 at the same time. There is a case.

  If the reader / writer 2 cannot hold a link with the IC cards 4 and 5 at the same time, it is necessary to perform communication processing with one type of IC card and then perform link processing with the other type of IC card. It will occur. A large number of communication link processes is not preferable because transactions increase. For this reason, it is desirable to perform communication processing under conditions that allow a link to be held at the same time even if the types of IC cards are different.

Therefore, in the present embodiment, the reader / writer 2 learns information for simultaneously holding a link between the IC cards 4 and 5, and the learning result is used as the information on the number of simultaneous links to determine the memory 6a of the reader / writer 2. It is stored in the database of the computer 3 . As a result, even if the types of the IC cards 4 and 5 are different , the simultaneous communication link processing is tried under the condition (parameter) that is likely to be able to hold the link at the same time , and the subsequent communication is processed smoothly. It is Ru can.

  FIG. 3 schematically shows the contents of the simultaneous link availability information stored in the memory 6a of the reader / writer 2 (or a database in the computer 3). The numbers in FIG. 3 indicate the number of times that the simultaneous communication link process has been tried. The parameter A in FIG. 3 is a group of parameters such as an optimum communication speed (for example, 106 kbps), a modulation method (for example, ASK), and a modulation degree (for example, 10%) for communication with the type A IC card 4. It is shown.

  Also, the parameter B in FIG. 3 is a parameter such as an optimum communication speed (for example, 106 kbps), a modulation method (for example, ASK), and a modulation degree (for example, 10%) for communication with the type A IC card 4. This is a parameter group for communicating with the type A IC card 4 at a higher communication speed (for example, 212 kbps) if the communication link is successful.

  3 is a parameter such as an optimum communication speed (for example, 106 kbps), a modulation method (for example, ASK), and a modulation degree (for example, 100%) for communication with the type B IC card 5. Indicates a group. For example, the contents of the column (1) in FIG. 3 indicate that the reader / writer 2 performs the communication link processing simultaneously with the parameter of the type A communication speed 106 kbps while the communication link is in the parameter of the communication speed 106 kbps of the type A IC card 4. The trial shows that it has continued 150 times and has never disconnected communication.

  Also, the content of the column (2) in FIG. 3 is that the reader / writer 2 communicates with the type B IC card 5 during the communication link with the type A IC card 4 at the communication speed of 106 kbps. When communication link processing is attempted simultaneously with a parameter of speed 106 kbps, communication is disconnected 100 times and communication is not continued once.

  Further, the content shown in the column (3) of FIG. 3 is that the reader / writer 2 communicates with the type B IC card 5 during the communication link with the type A IC card 4 at a communication speed of 212 kbps. When communication link processing is attempted simultaneously with a parameter for a speed of 106 kbps, it indicates that communication is continued 80 times and communication is not disconnected once.

  In the example shown in FIG. 3, when the reader / writer 2 communicates with a plurality of IC cards, the same result can be obtained no matter how many times it is tried in the case of the same parameter combination. Although an example is shown, this example shows an ideal case. Actually, the number of times of communication continuation (also referred to as the number of successful continuations) and the number of times of communication disconnection (also referred to as the number of continuation failures) may conflict. is there. As described above, data is accumulated due to the learning effect by repeating the trial of the simultaneous link processing many times. Therefore, by using this data, it is possible to improve the possibility of establishing a simultaneous communication link.

  The example shown in FIG. 3 shows an example in which the reader / writer 2 tries communication with parameters having different communication speeds when communicating with a plurality of IC cards. However, the reader / writer 2 is actually built in a card manufacturer or an IC card. Since it has been confirmed that the number of communication continuations and the number of communication disconnections change depending on the IC chip manufacturer and the OS installed therein, data may be acquired for each such parameter.

  These card manufacturer information, IC chip manufacturer information, and installed OS information are transmitted from each IC card 4 and 5 to the reader / writer 2 when the communication link process is performed. Specifically, in the case of the type A IC card 4, these information refer to ATQA (request response signal) and SAK (selection acknowledge signal), or the management information byte in the ATS (ISO / IEC 14443-4 compliant) ), The reader / writer 2 can acquire the information described above.

  In the case of type B IC card 5, refer to application data in ATQB (request response signal), IC code in polling response in high-speed processing card, IC manufacturer identification file in card having file structure, etc. By doing so, the reader / writer 2 can acquire the information described above. Further, these information and AFI information (card application field identifier) may be combined. As a result, card manufacturer information, IC chip manufacturer information, installed OS information, and the like can be acquired.

The operation of the above configuration will be described with reference to FIGS.
FIG. 4 is a flowchart showing an operation when the control circuit 6 of the reader / writer 2 performs a plurality of communication link processes. First, the control circuit 6 of the reader / writer 2 establishes a communication link with the type A IC card 4 at a communication speed of 106 kbps (step S1). When the control circuit 6 establishes a communication link with the type A IC card 4, data communication between the reader / writer 2 and the IC card 4 becomes possible.

  Next, the control circuit 6 of the reader / writer 2 reads out the parameters for communicating with the IC cards 4 and 5 through the external network N from the memory 6a and the information on the number of times of simultaneous linking when trying with the parameters (step S2). ). The control circuit 6 may be read from a database in the computer 3. At this time, when the control circuit 6 reads the simultaneous link availability count information, the control circuit 6 acquires the continuous success count and the continuous failure count from this data (step S3).

  The control circuit 6 adds the number of continuous successes and the number of continuous failure, determines whether or not the total number exceeds 100, and further, the value obtained by dividing the number of continuous failures by the total number exceeds 0.1. Is determined (step S4). In other words, if the number of trials is large and the ratio of the number of continuous failures to the total number of times is a parameter higher than a predetermined value, it is unlikely that the simultaneous communication link will be successful. (Step S5).

  When the condition of step S4 is not satisfied (step S4: NO), the control circuit 6 tries to capture with the acquired parameter (step S6). Specifically, when the number of trials is 100 times or less, or when the number of continuation failures is a predetermined ratio or less, a capture trial is performed using the acquired parameters.

  At this time, if the control circuit 6 succeeds in the acquisition trial (step S7: YES), this card parameter returns a return value indicating that there is a possibility of simultaneous link success (step S8), and returns to the link establishment confirmation routine. Move (step S9). On the other hand, if the acquisition has failed (step S7: NO), the control circuit 6 returns a return value indicating that the simultaneous communication link has failed (step S10), and proceeds to the link establishment confirmation routine of step S9. This is because the continuation failure frequency information is updated.

  When the control circuit 6 moves to the link establishment confirmation routine, it sends a command to the type A IC card 4 as shown in FIG. 5 (step S11). Upon receiving this command, the control circuit 10 of the type A IC card 4 responds to the control circuit 6 of the reader / writer 2 (step S12), but the control circuit 6 does not receive the response signal and determines that a timeout has occurred. If so (step S13: YES), the number of continuation failures is incremented (step S14) and stored as a database in the memory 6a of the computer 3 or the control circuit 6 (step S15).

  Conversely, if the control circuit 6 receives this response and accepts the response signal (step S13: NO), the number of successful continuations is incremented (step S16), and the computer 3 or the memory 6a of the control circuit 6 is stored in step S15. Save as a database. As a result, it is possible to update the number of continuous successes for performing a plurality of simultaneous link processes and the number of continuous failure processes for simultaneous link processes, which can be utilized in subsequent processes, and has a learning effect.

  According to such this embodiment, there exist the following effects. Simultaneous link availability information is stored in the database of the computer 3 or the memory 6a. After the control circuit 6 succeeds in the communication link processing with the IC card 4 and then performs the communication link processing with the IC card 5, prior to performing the simultaneous communication link processing of the IC cards 4 and 5 Obtain continuous success count information and continuous failure count information in the parameters used at the time of simultaneous link processing, determine whether the total number of trials is less than a predetermined number or the ratio of the number of continuous successes is greater than a predetermined ratio, Since communication link processing is attempted with the IC card 5 only when the determination result is satisfied, disconnection of communication links that have already been established when a plurality of communication links are established can be suppressed. Although the trial condition for the simultaneous communication link is that the total number of trials is less than the predetermined number, this condition may be omitted.

  Further, after establishing a communication link with the IC card 4, the control circuit 6 tries to establish a communication link with the IC card 5, and further establishes a communication link with the IC card 4. In order to determine whether or not there is a simultaneous communication link and whether or not to update the simultaneous link availability information as the simultaneous link availability count information, when a communication link is attempted with the IC cards 4 and 5, the communication result is tried after the communication link. Can be learned as reference data, and as the number of trials increases, the reliability of the simultaneous link availability information can be increased.

  Furthermore, since the control circuit 6 is connected to the external network N, it can transmit the information on the number of times of simultaneous link through the external network N. As a result, information can be shared with other management apparatuses connected to the external network N.

(Second Embodiment)
FIG. 6 shows the description of the second embodiment of the present invention. The difference from the first embodiment is that the communication link establishment order is determined based on the simultaneous link availability count information. The same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described below.

  FIG. 6 schematically shows the operation in determining the communication link establishment procedure in a flowchart. The control circuit 6 of the reader / writer 2 communicates at a desired communication speed when communicating with the type A IC card 4, but the parameters of the IC card 5 have no problem when communicating at the desired communication speed. It is determined whether or not there is (step T1). That is, it is determined whether there is a parameter group that does not cause a problem when the control circuit 6 of the reader / writer 2 performs simultaneous communication link with the IC cards 4 and 5. If there is no such parameter group (step T1: NO), the control circuit 6 makes simultaneous link establishment impossible (step T2) and ends the process.

  When it is determined that such a parameter group exists (step T1: YES), the control circuit 6 selects a parameter for the IC card 5 that has no problem at the desired communication speed of the IC card 4 as a candidate (step S1). T3). For example, parameters of a communication speed of 212 kbps with the IC card 4 and a communication speed of 106 kbps with the IC card 5 are selected.

  Next, the control circuit 6 determines whether or not there is a high possibility of continuing communication when communication is performed with the parameter for the IC card 4 with respect to the communication speed of the parameter for the selected IC card 5 (step T4). . This is determined by the control circuit 6 based on the simultaneous link availability information, but it is determined whether or not the parameters used at the time of communication link with the IC card 5 do not adversely affect the communication holding state with the IC card 4. Shows the processing to be performed.

  At this time, if the control circuit 6 determines that the parameter to be used is likely to continue communication based on the simultaneous link availability information, the control circuit 6 proceeds to step T5, but determines that the possibility of continuing communication is low. If so (step T4: NO), the studied parameters are excluded (step Ta), and the process is repeated from step T1.

  Next, the control circuit 6 communicates with a communication speed parameter required to reach a communication speed candidate of the type B IC card 5 with respect to a communication speed candidate of the type A IC card 4 (for example, 212 kbps). When processing is performed, it is determined whether or not there is a communication continuation failure (step T5). The reader / writer 2 needs to establish communication with the IC card 5 sequentially at a higher communication speed after establishing the communication link with the IC card 5 at the lowest communication speed. In this case, while the reader / writer 2 is communicating with the type A IC card 4, the communication with the type B IC card 5 is shifted from the lower communication speed to the higher communication speed in accordance with predetermined parameters. If the processing is performed, there is a possibility that the communication link with the type A IC card 4 is disconnected. For this reason, referring to the history information (learning information) and determining that there has been communication continuation failure (step T5: YES), the communication link by this parameter is avoided and the process proceeds to step T7.

  If the control circuit 6 determines that there is no communication continuation failure in step T5 (step T5: NO), the control circuit 6 establishes a communication link with the type A IC card 4 and then communicates with the type B IC card 5. Then, the communication link process is performed (step T6), and the process ends.

The control circuit 6 is a parameter of the communication speed that needs to pass from the candidate of the communication speed of the type B IC card 5 (for example, 106 kbps) to the candidate of the communication speed of the type A IC card 4 in step T7. When communication processing is performed, it is determined whether there is a communication that has failed to continue. This is because the reader / writer 2 communicates with the type B IC card 5 while shifting from the lower communication speed to the higher communication speed with a predetermined parameter while communicating with the type A IC card 4. When processing is performed, there is a possibility that the communication link with the type B IC card 5 may be disconnected. Therefore, this processing is performed to refer to the history information (learning information) and avoid the disconnection.
At this time, if the control circuit 6 determines in step T7 that there is no communication continuation failure (step T7: NO), the control circuit 6 establishes a communication link with the type B IC card 5 and then communicates with the type A IC card 4. The communication process is performed so that the simultaneous communication link process is performed at (Step T8).
However, if the control circuit 6 determines in step T7 that communication has failed to continue, the control circuit 6 moves to step Ta, excludes the studied parameter from the candidates, and repeats the processing from step T1.

  According to such an embodiment, when the control circuit 6 of the reader / writer 2 performs the simultaneous communication link process with the IC cards 4 and 5, the simultaneous communication is performed in the order in which there is a high possibility that the simultaneous communication link will be successfully established. Since the link processing is attempted, the simultaneous communication link can be established with a higher probability than the simultaneous communication link processing in a random order.

(Third embodiment)
FIG. 7 shows an explanation of the third embodiment of the present invention. The difference from the first or second embodiment is that simultaneous communication link processing is performed between the reader / writer 2 and the IC cards 4 and 5. When retry is performed, retry information indicating the result is stored in the memory 6a of the control circuit 6, and the control circuit 6 performs simultaneous communication link processing between the IC cards 4 and 5 based on the retry information. The same parts as those in the first or second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

FIG. 7 shows the contents of the retry information stored in the control circuit 6 on the reader / writer 2 side. As a result of repeating the experiment by the inventors, even if the simultaneous communication link processing once fails between the reader / writer 2 and the IC cards 4 and 5, the simultaneous link is immediately performed again by performing the same simultaneous communication link processing again. It has been confirmed that processing may continue and succeed. Therefore, the control circuit 6 of the reader / writer 2 is configured to try the simultaneous communication link process with the IC cards 4 and 5 continuously twice or more and store the result in the memory 6a as retry information. To do. In FIG. 7, the retry information is stored in the lower part of the figure together with the simultaneous link availability number information (upper part) composed of the number of continuous successes and the number of continuation failures, corresponding to each parameter combination. The numerical value described in the continuation (left side) is the number of successful retries, and the numerical value described in the column (right side) is the number of failed retries. Regardless of whether the simultaneous communication link succeeds or fails, the control circuit 6 stores the retry information in the memory 6a.

  The control circuit 6 refers to the retry information. For example, when the number of times of successful simultaneous communication link processing exceeds the number of failures, the simultaneous communication link processing is performed for the first time and the simultaneous communication link processing is performed again even if the failure occurs. . As a result, the control circuit 6 of the reader / writer 2 can perform a simultaneous communication link between the type A and type B IC cards 4 and 5.

(Other embodiments)
The present invention is not limited to the above embodiment, and for example, the following modifications or expansions are possible.

The control circuit 6 is a parameter in which the ratio of the number of continuation failures exceeds a predetermined ratio (for example, 0.1) with respect to the number of attempts of simultaneous communication links in a disconnected state of the communication link with the IC card 4 ( the communication method) may be attempting to communicate link with the IC card 5. In this case, when the control circuit 6 establishes a simultaneous communication link with the IC card 5, the control circuit 6 sets the parameter when trying the simultaneous communication link process with the IC cards 4 and 5 . The avoidance information indicating that the adoption has been avoided may be communicated to another management apparatus via the external network N. At this time, since avoidance information is transmitted to other management devices, compatibility when the control circuit 6 communicates with the IC cards 4 and 5 can be transmitted to other systems, and data is efficiently used. Can improve convenience.

  Although the memory 6a of the control circuit 6 shows the example in which the information on the number of simultaneous link availability is stored according to the communication speed of the type A IC card 4 and the type B IC card 5, the present invention is limited to this. For example, the simultaneous link availability count information may be stored according to the modulation degree. For example, the modulation degree is 100% in the case of the type A IC card 4, but is defined as 8% to 14% in the case of the type B IC card 5. Therefore, the simultaneous link availability count information may be stored separately for data when the modulation degree is set to a predetermined value of 9%, 10%, or 11%, for example. In addition, the number of simultaneous link availability information may be stored separately for each modulation method, or may be stored in combination. In such a case, substantially the same effect as the above-described embodiment can be obtained. Further, it is possible to obtain information on the number of simultaneous link availability by further finely classifying, and convenience can be improved.

Moreover, although the embodiment applied to the non-contact type IC card reader / writer system A compliant with the ISO / IEC14443 standard is shown, it is not necessarily applied to a system compliant with this standard.
Although the embodiment in which the reader / writer 2 and the computer 3 are provided as the management apparatus 1 is shown, the present invention is not limited to this. For example, the reader / writer 2 may have the function of the management apparatus 1 as a single unit. good.

1 is a schematic block diagram showing a first embodiment of the present invention. Block diagram showing electrical configuration The figure which shows an example of the simultaneous communication link availability count information Flow chart showing operation at the time of simultaneous communication link establishment processing (part 1) Flowchart showing the operation at the time of simultaneous communication link establishment processing (part 2) The flowchart which shows the operation | movement of the 2nd Embodiment of this invention. FIG. 3 equivalent view showing the explanation of the third embodiment of the present invention

Explanation of symbols

  In the drawings, 1 is a management device, 2 is a reader / writer, 3 is a computer, 4 is a type A IC card, 5 is a type B IC card, 6 is a control circuit (control means), 6a is a memory (storage means), 7 is a modulator, 8 is a receiver, 9 is an antenna coil, 10 is a control circuit, and 10a is a memory (storage means).

Claims (11)

The non-contact type IC card and communication processing to the management apparatus for reading and writing data stored in the data storage means by a predetermined procedure after establishing a communication link with the non-contact type IC card having a data storage means With
The management device supports a plurality of parameters defined for at least one of a modulation method, a modulation degree, and a communication speed of another non-contact IC card for each communication speed at which one non-contact IC card can communicate. Then , after establishing a communication link with the one non-contact type IC card and then trying a simultaneous communication link process for simultaneously establishing a communication link with the other non-contact type IC card, The number of successes of continuing the communication link with one non-contact type IC card, the number of times when the communication link is disconnected with the one non-contact type IC card, or another non-contact type IC card Rutotomoni comprising storage means for storing simultaneous link availability count information including the unsuccessful continuation number consisting of the sum of the acquisition number of failures in establishing itself communication link between,
Based on the simultaneous link availability information stored in the storage means , adopting a parameter with a high number of successful continuations, and attempting simultaneous communication link processing between the one and other non-contact type IC cards. A non-contact type IC card reader / writer system. The management apparatus establishes a communication link with the one non-contact type IC card, and tries the communication link with the other non-contact type IC card, and then the one non-contact type IC card. 2. The simultaneous link availability count information stored in the storage unit is updated according to the determination result . Non-contact type IC card reader / writer system.   3. The non-contact type IC card reader / writer system according to claim 1, wherein the management device is connected to an external network. When the management device attempts to establish a simultaneous communication link between one and another contactless IC card, the order of establishment of the communication link for each contactless IC card is stored in the storage means 4. The non-contact type IC card reader / writer system according to claim 1, wherein the non-contact type IC card reader / writer system is determined based on the simultaneous link availability number information in the order that the simultaneous communication link establishment is likely to be successful. In the management device, in a state where the communication link with the one non-contact type IC card is disconnected, the ratio of the number of continuous failures exceeds a predetermined ratio with respect to the total number of trials in the simultaneous link availability count information . If a communication link is established with the other non-contact type IC card by adopting parameters, and the communication link is established with the other non-contact type IC card, the one and the other It is configured so that avoidance information indicating that the adoption of the parameter is avoided can be communicated to other external management devices or higher-level devices when attempting simultaneous communication link processing with a non-contact type IC card. A non-contact type IC card reader / writer system according to any one of claims 1 to 4. The management apparatus, when attempting the simultaneous communication link process fails to establish a communication link between the other contactless IC card, attempts to adopt to again simultaneous communication link process the same parameters Retry information storage means for performing retry and storing the number of successes and failures of simultaneous communication link processing in the retry for each parameter as retry information, and the number of successes failed based on the retry information of the retry information storage means When a parameter exceeding the number of times is employed and the simultaneous communication link processing is tried with the one and other contactless IC cards, the retry is performed even if the simultaneous communication link processing fails for the first time. 6. The non-contact type IC card reader / writer system according to any one of claims 1 to 5. Control means for reading and writing data stored in said data storage means and the communication processing with the noncontact IC card according to a predetermined procedure after establishing a communication link with the non-contact type IC card having a data storage means When,
Corresponding to a plurality of parameters defined for at least one of the modulation method, modulation degree, and communication speed of another non-contact type IC card for each communication speed at which one non-contact type IC card can communicate, When a simultaneous communication link process for establishing a communication link with another contactless IC card after establishing a communication link with another contactless IC card is attempted, the one contactless type The number of continuous successes in which the communication link is continued with the IC card, the number of times the communication link is disconnected with the one non-contact type IC card, or the communication link with another non-contact type IC card Storage means for storing information on the number of simultaneous link availability including the number of continuous failures consisting of the total number of acquisition failures that failed to establish itself ,
The control means tries a simultaneous communication link process with the one and other non-contact type IC cards by adopting a parameter having a large number of continuous successes based on the simultaneous link availability number information of the storage means. A reader / writer characterized by this. The control means establishes a communication link with the one non-contact type IC card, tries a communication link with the other non-contact type IC card, and then the one non-contact type IC card. The simultaneous link availability count information stored in the storage means is updated according to a determination result of whether or not the communication link between the storage device and the communication link is continued. Reader / writer. When the control means tries to establish a simultaneous communication link between one and another non-contact type IC card, the order of establishment of the communication link for each non-contact type IC card is stored in the storage means. 9. The reader / writer according to claim 7 or 8, wherein the reader / writer is determined in the order that the simultaneous communication link establishment is highly likely to be successful based on the simultaneous link availability information . The control means is in a disconnected state of the communication link with the one non-contact IC card, and the ratio of the number of continuous failures exceeds the predetermined ratio in the total number of trials in the simultaneous link availability count information . If a communication link is established with the other non-contact type IC card by adopting parameters, and the communication link is established with the other non-contact type IC card, the one and the other It is configured so that avoidance information indicating that the adoption of the parameter is avoided can be communicated to other external management devices or higher-level devices when attempting simultaneous communication link processing with a non-contact type IC card. A reader / writer according to any one of claims 7 to 9. Wherein, when attempting the simultaneous communication link process fails to establish a communication link between the other contactless IC card, attempts to adopt to again simultaneous communication link process the same parameters Retry information storage means for performing retry and storing the number of successes and failures of simultaneous communication link processing in the retry for each parameter as retry information, and the number of successes failed based on the retry information of the retry information storage means When a parameter exceeding the number of times is employed and the simultaneous communication link processing is tried with the one and other contactless IC cards, the retry is performed even if the simultaneous communication link processing fails for the first time. 11. The reader / writer according to claim 7, wherein the reader / writer is any one of the above.

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