JP5754287B2 - IC chip, processing method in IC chip, UIM, portable terminal, and processing program for IC chip - Google Patents

Description

  The present invention relates to a processing technique in an IC chip including processing means corresponding to a plurality of interfaces.

  Conventionally, portable terminals equipped with a UIM (User Identity Module) equipped with a contact IC (Integrated Circuit) chip have been widely used. In recent years, by mounting a non-contact type IC chip on such a portable terminal, various functions (services) can be added to a UIM using a non-contact communication interface in addition to conventional functions (for example, subscriber authentication processing). ) Is in the process of developing a global system. Non-contact type IC chips mounted on portable terminals include, for example, so-called FeliCa chips that employ a FeliCa (registered trademark) communication method, and CLF (Contact Less Front-end) defined by NFC (Near Field Communication) standards. )and so on. Then, by connecting such a non-contact type IC chip to an interface different from the existing contact communication interface provided in the UIM, the non-contact communication application is used in addition to the contact communication application in the UIM. be able to.

  Incidentally, an IC chip such as UIM uses a mechanism called “Transaction” in order to cope with interruption of power supply due to extraction or the like during writing processing to a nonvolatile memory. A transaction refers to a mechanism that can take only a state before or after the start of a specific series of processing. This mechanism prevents the data stored in the non-volatile memory from becoming an incomplete internal state. Patent Document 1 describes that when power supply is interrupted, the state before data writing is restored.

Japanese Patent No. 4195822

  However, according to the conventional method, when the writing process is interrupted, it is only determined whether or not the backup for returning to the state before the start by the transaction is valid. According to this method, in an IC chip provided with processing means corresponding to the contact communication interface and the non-contact communication interface, for example, the processing using the contact communication interface and the non-operation at the initial operation after the interruption due to the power-off is performed. Although the data area required for processing using the contact communication interface is different, the transaction is executed without distinguishing between the two data areas. At this time, it is sufficient if the processing time constraints required by each other have a sufficient margin, but generally the processing time constraints required by the non-contact communication interface are often stricter. Therefore, in the conventional method, there is a possibility that processing using the non-contact communication interface is not normally performed.

  Therefore, the present invention has been made in view of such points and the like, and even when a transaction is performed due to processing interruption, processing using the interface with the stricter processing time constraint is normally performed. An object of the present invention is to provide an IC chip, a processing method for the IC chip, and a processing program for the IC chip.

In order to solve the above-mentioned problem, the invention described in claim 1 is a non-volatile memory comprising processing means corresponding to a plurality of interfaces, a data storage area for storing data, and a backup area for backing up the data. When data received by processing using the memory and the first interface is written to the data storage area, the data stored in the data storage area is backed up to the backup area, and the first interface Control means for performing processing for writing back the data backed up in the backup area to the data storage area when the process using is interrupted, and the control means backs up to the backup area In the process of writing back the stored data to the data storage area Whether or not data necessary for processing using the second interface is backed up in the backup area when processing using the second interface different from the first interface is started When the backup is not performed, the process using the second interface is prioritized over the write-back process.

  According to a second aspect of the present invention, in the IC chip according to the first aspect, the first interface is a contact communication interface, and the second interface is a non-contact communication interface. It is characterized by.

Invention according to claim 3, in IC chip according to claim 1 or 2, wherein, when backing up the data, whether written back in favor of the data to be backed up target Log data including information to be stored in the non-volatile memory, and the control means, in the process of writing back the data backed up in the backup area to the data storage area, the first interface When processing using a different second interface is started, if data that is preferentially written back with reference to the log data stored in the nonvolatile memory is not backed up in the backup area, The processing using the second interface is prioritized over the writing back processing. That.

The invention according to claim 4 is a UIM (User Identity Module) on which the IC chip according to any one of claims 1 to 3 is mounted .

The invention described in claim 5 is a mobile terminal equipped with the UIM described in claim 4.

The invention according to claim 6 is a non-volatile memory having processing means corresponding to a plurality of interfaces, a data storage area for storing data, and a backup area for backing up the data, and the first interface When data received by processing using the data is written to the data storage area, the data stored in the data storage area is backed up to the backup area, and the process using the first interface is interrupted In this case, the processing method in the IC chip includes a control means for performing processing for writing back the data backed up in the backup area to the data storage area, and the control means backs up to the backup area. The stored data is written back to the data storage area In processing, when processing using the second interface different from the first interface is activated, whether data necessary for processing using the second interface is backed up in the backup area If the backup is not performed, the process using the second interface is prioritized over the write-back process.

The invention of a processing program for an IC chip according to claim 7 is a non-volatile memory comprising processing means corresponding to a plurality of interfaces, a data storage area for storing data, and a backup area for backing up the data. When the data received by the processing using the first interface is written to the data storage area, the data stored in the data storage area is backed up to the backup area, and the first interface is used. And a control means for performing processing for writing back the data backed up in the backup area to the data storage area when the process is interrupted, the computer included in the IC chip is backed up to the backup area. The data stored in the data storage In the process of writing back to the area, when a process using the second interface different from the first interface is started, data necessary for the process using the second interface is backed up to the backup area. In the case where the backup is not performed, the process using the second interface is prioritized over the write-back process.

  According to the present invention, even when a transaction is performed due to a process interruption, it is possible to normally perform a process using an interface with a stricter processing time constraint.

It is a block diagram which shows the example of a schematic structure of the portable terminal which concerns on this embodiment. It is a block diagram which shows the example of a schematic structure of UIM13. It is a figure which shows the example of a transition of the data memorize | stored in a data storage area, a backup area, and a log storage area in a transaction. It is a flowchart which shows the priority process when the transaction in CPU131 of UIM13 is interrupted.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an embodiment when the present invention is applied to a mobile terminal.

  First, with reference to FIG. 1, the configuration and functional overview of the mobile terminal according to the present embodiment will be described.

  FIG. 1 is a block diagram illustrating a schematic configuration example of a mobile terminal according to the present embodiment. As shown in FIG. 1, the mobile terminal 1 includes a controller 11, a CLF 12, and a UIM 13 (an example of an IC chip according to the present invention) that are responsible for the functions of the mobile terminal 1. For example, a mobile phone, a PDA, or the like including operation keys, a display, a speaker, a mobile communication unit, and the like can be applied to the mobile terminal 1.

  Although not shown, the controller 11 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) for storing various programs and data, a rewritable nonvolatile memory, a RAM (Random Access Memory) for temporarily storing data, And an I / O port and the like that serve as an interface with the UIM 13. The non-volatile memory is composed of, for example, a flash memory or an EEPROM (Electrical Erasable Programmable Read Only Memory). The controller 11 can communicate with the UIM 13 via an interface. And the controller 11 performs various processes according to the communication (communication performed via a mobile communication network and the internet) process of the portable terminal 1, and the operation instruction from the user of the portable terminal 1 via the operation key. In such processing, the controller 11 transmits a command signal related to, for example, encryption processing and authentication processing to the UIM 13 via the interface. Further, the controller 11 is configured to transmit an interface reset signal to the UIM 13 when a communication error occurs between the controller 11 and the UIM 13, for example.

  The CLF 12 is a contactless IC chip that performs contactless communication defined by the NFC standard. Although not shown, the CPU, a ROM that stores various programs and data, a rewritable nonvolatile memory, and data temporarily A RAM to be stored, an I / O port (SWIO) that performs an interface with the UIM 13, and the like are provided. The CLF 12 is connected to an antenna 12a for transmitting / receiving various signals to / from the non-contact reader 2 in the field of non-contact communication. When the user places the portable terminal 1 on the contactless reader 2, a command signal related to a service request transmitted from the contactless reader 2 is transmitted to the UIM 13 via the interface.

  The UIM 13 is one of UICCs (Universal Integrated Circuit Cards), and is equipped with a contact type IC chip whose functions are expanded based on a conventional SIM (Subscriber Identity Module). FIG. 2 is a block diagram illustrating a schematic configuration example of the UIM 13. As shown in FIG. 1, the UIM 13 includes a CPU 131, a ROM 132 for storing various programs and data, a rewritable nonvolatile memory 133, a RAM 134 for temporarily storing data, and a contact communication interface (first interface). An I / O port that bears an example of one interface) and an I / O port that bears an interface for contactless communication with the CLF 12 (an example of a second interface different from the first interface). . Note that SWP (Single Wire Protocol) is applied to the non-contact communication interface between the CLF 12 and the UIM 13. The non-contact communication interface defines a procedure and a format for exchanging data between programs, and operates as software.

  Data received from the controller 11 and the CLF 12 according to the present invention is communicated via a contact terminal of the UIM 13. For example, data received from the controller 11 is received via an I / O port for receiving the controller 11 at a metal terminal of the UIM 13. Then, the CPU 131 of the UIM 13 executes the contact communication interface process as a processing unit corresponding to the contact communication interface. The data received from the CLF 12 is received via a CLF 12 receiving I / O port different from the controller 11 receiving I / O port at the metal terminal of the UIM 13. The UIM CPU 131 executes non-contact communication interface processing as processing means corresponding to the non-contact communication interface.

  Examples of programs stored in the ROM 132 or the nonvolatile memory 133 of the UIM 13 include an operating system (hereinafter referred to as “OS”), middleware, a plurality of types of application programs, and an IC chip processing program of the present invention. is there. The middleware performs an intermediate process between the OS and the application program. The IC chip processing program of the present invention may be incorporated as a function of the OS, middleware, or application program. The middleware and application program (hereinafter referred to as “application”) are programs that specify a plurality of commands (instructions) executed by the CPU 131 and their execution order. Applications include a contact communication application and a non-contact communication application. Similarly, middleware includes contact communication middleware and non-contact communication middleware. The IC chip processing program of the present invention can be used at any of the OS, middleware, and application level.

  The non-volatile memory 133 of the UIM 13 includes a data storage area for storing data, a backup area for backing up data, and a log storage area for storing a log related to backup. The data storage area stores personal information such as telephone numbers and subscriber IDs, and data such as electronic money balance information.

  The CPU 131 of the UIM 13 functions as the “control unit” in the present invention by executing the IC chip processing program of the present invention. The CPU 131 of the UIM 13 performs processing using the contact communication interface and processing using the non-contact communication interface under execution of the OS. In the processing using the contact communication interface, for example, command processing corresponding to a command (command defined by the contact communication application) indicated by the command signal received from the controller 11 via the contact communication interface is performed. On the other hand, in the process using the non-contact communication interface, for example, the command process corresponding to the command (command defined by the non-contact communication application) indicated by the command signal received from the CLF 12 via the non-contact communication interface. Is done.

  Here, as an example of the command process, there is a write process for writing data received via the contact communication interface or the non-contact communication interface into the data storage area. This writing process is performed by the OS, middleware, or application. In this writing process, for example, data is written to the data storage area in units of data blocks (for example, several tens to several hundred bytes) including a plurality of pieces of information. In this writing process, the above-described transaction is performed. In this transaction, the CPU 131 backs up the data stored in the data storage area to the backup area when writing data in the data storage area. Furthermore, when the CPU 131 backs up data, it stores log data related to the backup of the data to be backed up in the log storage area. The log data includes, for example, a backup source (write-back destination) address, a backup destination (write-back source) address, a data amount to be written back (not required when processing with a fixed value), a priority flag, a status flag, Data for verification (for example, CRC (Cyclic Redundancy Check) data, which is unnecessary if tampering detection is not necessary), etc. are included. Here, the backup source address is an address of a data storage area in which data to be backed up is stored. The backup destination address is an address of a backup area where data is backed up. The priority flag is information indicating whether or not to write back the backed up data with priority. For example, the priority flag is “0” indicating that writing is preferentially written back (in other words, immediately writing back), or “1” indicating that writing is not preferentially written (in other words, writing back later). expressed. Alternatively, the priority flag may be a value indicating the type or classification of the backup source. The status flag is information indicating whether or not the transaction is normally completed. For example, the status flag is represented by “00” indicating that the transaction has not ended or “FF” indicating that the transaction has ended normally. When there are a plurality of data to be backed up, this log data may be stored separately for each data, or may be stored as one log data without being distinguished.

  FIG. 3 is a diagram illustrating a transition example of data stored in the data storage area, the backup area, and the log storage area in the transaction. In the example shown in FIG. 3A, three pieces of data D1x to D3x (one piece of data is composed of, for example, a 128-byte data block) are already stored in the data storage area. Among these pieces of data, data D1x and data Assume that D3x is data to be rewritten. When there is a transaction start command, the transaction is started. First, as shown in FIG. 3B, the data D1x is backed up in the backup area (once stored in the RAM 134 and then stored in the backup area). Log data Log1 is stored in the log storage area. Then, the data D1x already stored in the data storage area is rewritten with new data D1y. Next, as shown in FIG. 3C, the data D3x is backed up in the backup area (once stored in the RAM 134 and then stored in the backup area), and log data Log3 relating to the backup is stored in the log storage area. . Then, the data D3x already stored in the data storage area is rewritten with new data D3y. When there is a transaction end instruction, as shown in FIG. 3D, the status flag included in the log data Log3 is rewritten with information indicating that the transaction has been normally completed (committed) (the transaction has not been completed). Data D1x and data D3x backed up in the backup area are deleted. When such a transaction is interrupted without being terminated normally, and the status flag described above does not indicate that the transaction has terminated normally, the CPU 131 writes the data backed up in the backup area to the data storage area. Perform processing to return. By the way, when the process using the contact communication interface is interrupted and the process using the non-contact communication interface is activated during the process of writing back up the data backed up in the backup area to the data storage area in the process ( In other words, if the process of writing back the data used in the process using the contact communication interface and the process using the non-contact communication interface overlap) There is a possibility that the processing using the severe contactless communication interface may not be performed normally.

  Therefore, the CPU 131 of the UIM 13 according to the present embodiment uses the non-contact communication interface in the process of writing the data backed up in the backup area back to the data storage area when the process using the contact communication interface is interrupted. If the data required for the processing using the non-contact communication interface is backed up in the backup area and the data required for the processing is not backed up, The process using the non-contact communication interface is prioritized over the process of rewriting. Such processing is called priority processing.

  In the following, priority processing when a transaction is interrupted will be described in detail with reference to FIG. FIG. 4 is a flowchart showing priority processing when a transaction in the CPU 131 of the UIM 13 is interrupted. The process shown in FIG. 4 is started when the process using the non-contact communication interface starts when the process using the contact communication interface is interrupted and the status flag in the log data is “FF”, for example. The As such a case, for example, when the user operates the mobile terminal 1 (when writing processing according to an operation instruction is performed), the power is turned off (for example, due to the battery remaining in the mobile terminal running out). Immediately after this, a case where the user deceives the portable terminal 1 as, for example, a contactless reader 2 provided in a ticket gate or a contactless authentication gate (processing start using a contactless communication interface) can be considered.

  When the process shown in FIG. 4 is started, the CPU 131 of the UIM 13 checks the log data stored in the log storage area (step S1), and the data necessary for the process using the non-contact communication interface is stored in the backup area. It is determined whether it has been backed up (step S2). For example, the CPU 131 refers to the priority flag included in the log data and determines whether the data to be preferentially written back is backed up in the backup area. For example, when the priority flag is “0” indicating that writing is preferentially written back, it is determined that the data to be written back preferentially is backed up in the backup area. That is, in this case, it is determined that the data necessary for processing using the non-contact communication interface is backed up in the backup area. On the other hand, for example, when the priority flag is “1” indicating that the data is not rewritten with priority, it is determined that the data to be rewritten with priority is not backed up in the backup area. That is, in this case, it is determined that data necessary for processing using the contactless communication interface is not backed up in the backup area.

  When the priority flag is a value indicating the type or classification of the backup source, the CPU 131 of the UIM 13 needs to write back the data storage area (backup source) of the backed up data with priority based on the value. It is determined whether or not the data storage area is a data area (data area used not only for the contact communication application but also for the non-contact communication application). If the data storage area of the backed up data is a data storage area that needs to be written back preferentially, it is determined that the data required for processing using the non-contact communication interface is backed up in the backup area. The On the other hand, if the data storage area of the backed-up data is not a data storage area that needs to be written back preferentially, it is determined that the data necessary for processing using the non-contact communication interface has not been backed up to the backup area .

  If the CPU 131 of the UIM 13 determines that data necessary for processing using the non-contact communication interface is backed up in the backup area (step S2: YES), the determined data is transferred from the backup area. Writing back to the data storage area (step S3), the process proceeds to step S4. For example, if the data D1x shown in FIG. 3 is data necessary for processing using the non-contact communication interface, the data D1x is written back to the data storage area as shown in FIG. Deleted from. On the other hand, when the CPU 131 of the UIM 13 determines that the data necessary for the processing using the non-contact communication interface is not backed up in the backup area (step S2: NO), the data is not written back. Proceed to step S4. For example, if the data D3x shown in FIG. 3 is not necessary for processing using the non-contact communication interface, the data D3x is not written back to the data storage area as shown in FIG. Will remain backed up.

  In step S4, the CPU 131 of the UIM 13 determines whether or not to end the writing back process. If it is determined not to end the writing back process (step S4: NO), the process returns to step S1. For example, if there is data that has not been determined in step S2 among the data stored in the backup area, the process returns to step S1 without ending the write-back process, and the data that has not been determined yet. The same processing as above is performed.

  On the other hand, if the CPU 131 of the UIM 13 determines that the write back process is to be terminated (step S4: YES), the process shown in FIG. 4 is terminated and the process proceeds to a process using the non-contact communication interface. For example, the data D3x that has not been written back in step S3 is written back to the data storage area when the contact communication interface is restarted, for example, as shown in FIG. In other words, data that could not be restored when the process using the non-contact communication interface was started may be restored, for example, when there is a response time margin or when the data becomes necessary.

  As described above, according to the above embodiment, in the process of writing back up the data backed up in the backup area to the data storage area when the process using the contact communication interface is interrupted, the non-contact communication interface is If the data required for processing using the contactless communication interface is not backed up in the backup area when the processing used is started, the processing using the contactless communication interface is given priority over the write back processing. Since it is configured to perform, processing using the non-contact communication interface with severe processing time restrictions can be performed normally (no error occurs).

  In the above embodiment, the case where the first interface in the present invention is a contact communication interface and the second interface in the present invention is a non-contact communication interface has been described as an example. If the second interface is stricter than the predetermined value, the present invention can be applied even if it is not a non-contact communication interface, and the same effect can be obtained. As another example, the present invention can be applied even if both the first interface and the second interface in the present invention are non-contact communication interfaces, and the same effects can be obtained.

  Moreover, in the said embodiment, although the example at the time of applying the IC chip of this invention to UIM13 mounted in the portable terminal 1 was demonstrated, a prepaid card, a credit card, a cash card, an employee card, or a traffic card It is also applicable to so-called IC chips (having processing means corresponding to a plurality of interfaces) mounted on an IC card. The priority processing in this case is the same as described above, but as a case, for example, the user pulls out the IC card from a personal computer or the like having an IC card authentication function (for example, an IC card mounting device connected to the personal computer). (Thus, the process using the contact communication interface is interrupted), and the user can pass through the non-contact authentication gate such as a door by using the IC card. A case where the user is dressed as a contact reader (start of processing using a non-contact communication interface) is considered, and the processing shown in FIG. 4 is performed.

1 mobile terminal 2 non-contact reader 11 controller 12 CLF
13 UIM
131 CPU
132 ROM
133 Non-volatile memory 134 RAM

Claims (7)

Processing means for multiple interfaces;
A non-volatile memory having a data storage area for storing data and a backup area for backing up the data;
When data received by processing using the first interface is written to the data storage area, the data stored in the data storage area is backed up to the backup area, and the first interface is used. If the process is interrupted, control means for performing a process of writing back the data backed up in the backup area to the data storage area;
With
In the process of writing back the data backed up in the backup area to the data storage area, the control means, when a process using the second interface different from the first interface is activated, It is determined whether data necessary for processing using the second interface has been backed up in the backup area. If the data has not been backed up, the second interface is used in the writing back processing. An IC chip characterized by prioritizing the processing performed. The IC chip according to claim 1,
The first interface is a contact communication interface;
2. The IC chip according to claim 2, wherein the second interface is a contactless communication interface. The IC chip according to claim 1 or 2,
Wherein, said data when backing up the stores the log data in the non-volatile memory containing information indicating whether or not writing back in favor of the data to be backed up object,
In the process of writing back the data backed up in the backup area to the data storage area, the control means, when a process using the second interface different from the first interface is activated, When the data to be written back with priority by referring to the log data stored in the non-volatile memory is not backed up in the backup area, the processing using the second interface is performed rather than the writing back processing. An IC chip characterized in that it is given priority. A UIM on which the IC chip according to any one of claims 1 to 3 is mounted . A portable terminal equipped with the UIM according to claim 4 . Data received by processing using the first interface, non-volatile memory having processing means corresponding to a plurality of interfaces, a data storage area for storing data, and a backup area for backing up the data When data is stored in the data storage area, the data stored in the data storage area is backed up in the backup area, and when the processing using the first interface is interrupted, the data is backed up in the backup area. Control means for performing processing for writing back the data being written back to the data storage area,
In the process in which the control means writes back the data backed up in the backup area to the data storage area, when a process using the second interface different from the first interface is activated, It is determined whether data necessary for processing using the second interface has been backed up in the backup area. If the data has not been backed up, the second interface is used in the writing back processing. A processing method in an IC chip, characterized in that the processing performed is given priority. Data received by processing using the first interface, non-volatile memory having processing means corresponding to a plurality of interfaces, a data storage area for storing data, and a backup area for backing up the data When data is stored in the data storage area, the data stored in the data storage area is backed up in the backup area, and when the processing using the first interface is interrupted, the data is backed up in the backup area. A computer included in an IC chip, comprising: control means for performing a process of writing back the data being written back to the data storage area;
In the process of writing back the data backed up in the backup area to the data storage area, when a process using the second interface different from the first interface is activated, the second interface It is determined whether or not data necessary for processing using the data is backed up in the backup area. If the data is not backed up, the processing using the second interface is prioritized over the writing back processing. An IC chip processing program characterized in that the program is made to function as described above.

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