JP2009026139A - Information storage medium and method for relocating file - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for accelerating the processing speed of an IC card. <P>SOLUTION: In the method for relocating files in the information storage medium comprising a card main body in which modules are embedded, a plurality of files are stored, a plurality of file management information data for managing the plurality of files are stored in prescribed positions, a prescribed file is selected from the plurality of files on the basis of a command from the external, processing based on the selected file is executed, and the plurality of file management information data are relocated on the basis of the file selection result. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information storage medium called an IC card including an IC (Integrated Circuit) chip having control elements such as a CPU, ROM, RAM, and EEPROM, for example. Furthermore, the present invention relates to a file rearrangement method in such an information storage medium.

  IC cards are used not only for settlement of credit cards, commuter passes, and other commercial transactions, but also in various fields as ID cards for employee cards, membership cards, insurance cards, and the like. Compared to conventional magnetic cards, the IC card is provided with an IC having control elements such as a CPU, ROM, RAM, and EEPROM, so that various functions can be realized, and furthermore, counterfeiting is difficult. This is due to the significant improvement in security.

  This type of IC card stores, for example, data necessary for the operation of a use application in a file format, and each file corresponds to each of a plurality of applications. Individual files can be used only selectively by inputting an application identification name or the like from an external device.

  Thus, since the IC card stores a plurality of files corresponding to a plurality of applications, it can be used for various purposes and is very convenient. On the other hand, since the IC card stores a plurality of files corresponding to a plurality of applications, the selection time of the target file tends to be long, and there is a demand for time reduction.

  For example, when using an IC card whose application identification name is already known, it is possible to select an application to be used using the entire application identification name. On the other hand, when using an IC card whose type of application is unknown, the application identification name is unknown and it takes time to select the application (file).

On the other hand, when the information indicating the priority order is given to each file and the command data instructing the file selection is received, the file is selected according to the priority order of the file, thereby reducing the processing time required for the file selection. The technique to do is disclosed (refer patent document 1).
JP2003-150913A

  Although the above-described technique has been proposed, there is still a demand for a high-speed IC card. For example, the above-described technology cannot preferentially call a recently used file at high speed.

  An object of the present invention is to provide a technique for speeding up processing in an IC card.

  The information storage medium and the file rearrangement method of the present invention are configured as follows.

  The information storage medium according to the present invention is an information storage medium constituted by a card body in which a module is embedded. The module stores communication means for communicating with a medium processing device, a plurality of files, and the plurality of files. Storage means for storing a plurality of file management information for managing the file in a predetermined arrangement, and file selection means for selecting a predetermined file from the plurality of files based on a command received via the communication means And data processing means for executing predetermined processing based on the file selected by the file selection means, and relocation means for rearranging a plurality of file management information based on the file selection result by the file selection means. Prepare.

  The information storage medium according to the present invention is an information storage medium constituted by a card body in which a module is embedded. The module stores communication means for communicating with a medium processing device, a plurality of files, and the plurality of files. A plurality of file management information for managing a plurality of file management information based on a command received via the communication means, a storage means for storing the file management information in a predetermined arrangement based on the priority given to the plurality of file management information, A file selection means for selecting a predetermined file from the plurality of files, a data processing means for executing a predetermined process based on the file selected by the file selection means, and a file selected by the file selection means. The priority given to the file management information is changed, and the priority given to the plurality of file management information is changed. Based on and a rearrangement means for rearranging the plurality of file management information.

  The file rearrangement method according to the present invention is a file rearrangement method in an information storage medium constituted by a card body in which a module is embedded, and stores a plurality of files and manages a plurality of the files. The file management information is stored in a predetermined arrangement, based on an external command, a predetermined file is selected from the plurality of files, processing based on the selected file is executed, and based on the file selection result, The plurality of file management information are rearranged.

  The file rearrangement method according to the present invention is a file rearrangement method in an information storage medium constituted by a card body in which a module is embedded, and stores a plurality of files and manages a plurality of the files. Is stored in a predetermined arrangement based on the priority given to the plurality of file management information, and a predetermined file is selected from the plurality of files based on an external command, and the selected Execute processing based on the file, change the priority assigned to the file management information of the selected file, and rearrange the plurality of file management information based on the priority assigned to the plurality of file management information To do.

  According to the present invention, it is possible to provide a technique for speeding up processing in an IC card.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of an IC card system according to an embodiment of the present invention. As shown in FIG. 1, the IC card system includes a terminal 1 and an IC card 2.

  The terminal 1 includes a main body (upper apparatus) 11, a display 12, a keyboard 13, and a card reader / writer 14. For example, the card reader / writer 14 includes a contact unit, a control unit, a RAM, a ROM, and a nonvolatile memory. The terminal 1 is configured to be communicable with the IC card 2, and the terminal 1 transmits data to the IC card 2 and receives data from the IC card 2.

  The main body 11 executes applications and controls input / output. The display 12 displays a result of communication with the IC card 2 and the like. The keyboard 13 inputs characters and numbers to the main body 11. The card reader / writer 14 communicates with the IC card 2.

  In the present embodiment, the case where the IC card 2 supports the contact communication function will be described. However, the IC card 2 may support the non-contact communication function, or the contact card communication function and the non-contact communication function. It may be a combination type that supports both contact-type communication functions. Similarly, the case where the card reader / writer 14 supports the contact communication function will be described. However, the card reader / writer 14 may support the non-contact communication function, or the contact communication function and the non-contact communication function. It may be a combination type that supports both contact-type communication functions.

  FIG. 2 is a block diagram showing a schematic configuration of an IC card according to an embodiment of the present invention. The IC card shown in FIG. 2 has a function of communicating with an external device (terminal 1), has a program for realizing processing instructed by the external device, interprets and executes an instruction from the external device, and results thereof. Respond.

  As shown in FIG. 2, the IC card 2 includes a modularized contact unit 21, a control unit 22 having a control element such as a CPU, a RAM 23, a ROM 24, and a nonvolatile memory 25 such as an EEPROM, FRAM, and a flash memory. I have.

  The contact portion of the card reader / writer 14 is an interface that is connected to the contact portion 21 of the IC card 2 and transmits / receives data between the card reader / writer 14 and the IC card 2. The control unit of the card reader / writer 14 generates various commands based on instructions from the main body 11. The RAM of the card reader / writer 14 temporarily stores data transmitted from the IC card 2, for example. The ROM of the card reader / writer 14 stores a control program executed by the control unit of the card reader / writer 14.

  The control unit 22 of one IC card 2 controls the writing operation and the reading operation based on various commands transmitted from the card reader / writer 14. For example, the RAM 23 temporarily stores a result of processing executed by the control unit 22. The ROM 24 stores a control program executed by the control unit 22. The nonvolatile memory 25 is a memory that can retain data even after power supply is cut off.

  The nonvolatile memory 25 stores a plurality of files corresponding to a plurality of applications and stores a plurality of file definition information (file management information) for managing the plurality of files in a predetermined arrangement. For example, the nonvolatile memory 25 has a definition information storage area, and the file definition information is stored in the order created in the definition information storage area. The plurality of file definition information has a certain information length.

  The RAM 23 stores a plurality of file definition information read from the nonvolatile memory 25. For example, the file definition information is stored in the order based on the priority assigned to the plurality of file definition information.

  FIG. 3 is a diagram illustrating an example of a plurality of file definition information (file definition information (1) to (n)) stored in the definition information storage area of the RAM 23. Further, the RAM 23 realizes the definition information rearrangement process (definition information rearrangement process), as shown on the right side of FIG. 6, the definition information storage area start address indicating the start address of the definition information storage area, the definition A definition information storage area length indicating the length of the information storage area, a first temporary use data storage area for storing the selected address, a second temporary use data storage area for storing the save definition information start address, And a third temporary use data storage area for storing save definition information.

  FIG. 4 is a flowchart showing an example of a file selection process based on command reception in the IC card.

  When the contact unit 21 of the IC card receives a command transmitted from the card reader / writer 14 (ST11), the control unit 22 of the IC card 2 checks whether the received command is a command that requires file selection processing. (ST21). If control unit 22 determines that the received command is a command that requires file selection processing (ST12, YES), it executes file selection processing (ST13). When the control unit 22 confirms the normal end of the file selection process (ST14, YES), the definition information start address of the file definition information found (selected) in the first temporary use data storage area held in the RAM 23 (= Selected address) is set (ST15). When the control unit 22 cannot confirm the normal completion of the file selection process (NO in ST14), the definition information storage area start address (= selected address) for the first temporary use data storage area held in the RAM 23 Is set (ST16). Thereafter, the control unit 22 executes the definition information rearrangement process (definition information rearrangement process) at the timing when the file selection process is not executed (ST12, NO) (ST17).

  FIG. 5 is a flowchart illustrating an example of the definition information rearrangement process. FIG. 6 is a state transition diagram illustrating an example of the definition information rearrangement process. The definition information rearrangement process will be described with reference to FIGS.

  The control unit 22 of the IC card compares the selected address (for example, 0x1020) set in the first temporary use data storage area with the definition information storage area start address (for example, 0x1000) (ST21), and selects the selected address. And the definition information storage area start address are equal (ST21, YES), the definition information rearrangement process is terminated without executing the definition information rearrangement.

  When the selected address and the definition information storage area start address are not equal (NO in ST21), the control unit 22 selects the selected address and the definition information storage area final address (definition information storage area start address + definition information storage area length ( 0x50)), and if the selected address is larger than the final address of the definition information storage area (ST22, YES), data indicating abnormality is set, and the definition information rearrangement process is terminated.

  When the selected address is not larger than the final address of the definition information storage area (NO in ST22), the control unit 22 sets the definition information storage area start address (0x1000) in the second temporary use data storage area ( ST23). That is, the definition information storage area start address (0x1000) is set as the save definition information start address.

  Further, the control unit 22 updates the save definition information start address (0x1000) stored in the second temporary use data storage area. That is, the control unit 22 adds the save definition information start address (0x1000) and the definition information length (0010) to calculate a new save definition information start address (0x1010). That is, the addition result A is calculated (ST24).

  Further, the control unit 22 saves the data string (definition information (2)) having the length of one file definition information from the save definition information start address (0x1010) indicated by the addition result A to the third temporary use data storage area ( ST25). That is, the definition information (2) is copied to the third temporary use data storage area.

  Further, the control unit 22 checks whether or not the save definition information start address (0x1010) indicated by the addition result A is equal to the currently selected address (0x1020) (ST26). When the save definition information start address (0x1010) indicated by the addition result A is not equal to the selected address (0x1020) (NO in ST26), the control unit 22 starts from the save definition information start address (0x1010) indicated by the addition result A. The definition information (1) is copied for one file definition information length (ST28).

  Further, the control unit 22 updates the save definition information start address (0x1010) stored in the second temporary use data storage area. That is, the save definition information start address (0x1010) and the definition information length (0010) are added to calculate a new save definition information start address (0x1020) (ST29). That is, the addition result A ′ is calculated (ST24).

  Further, the control unit 22 saves the data string (definition information (3)) of one file definition information length from the save definition information start address (0x1020) indicated by the addition result A ′ to the third temporary use data storage area. (ST25). That is, the definition information (3) is copied to the third temporary use data storage area.

  Further, the control unit 22 checks whether or not the save definition information start address (0x1020) indicated by the addition result A 'is equal to the currently selected address (0x1020) (ST26). When the save definition information start address (0x1020) indicated by the addition result A ′ is equal to the currently selected address (0x1020) (ST26, YES), the control unit 22 indicates the save definition information start address (0x1020) indicated by the addition result A ′. The definition information (2) is copied for one file definition information length (ST27).

  Further, the control unit 22 copies the definition information (3) saved in the third temporary use data storage area from the definition information storage area start address (0x1000) to one file definition information length.

  As described above, the file definition information selected in ST13 is stored at the head of the definition information storage area. In other words, the file definition information selected in ST13 is arranged at the head of all the file definition information.

  Here, a case where priority is given to all file definition information and the file definition information is rearranged based on the priority, that is, a case where the file definition information is stored in a predetermined arrangement based on the priority will be described. The basic concept is the same as the file definition information rearrangement process described with reference to FIGS.

  That is, the priority given to the file definition information of the selected file is changed. For example, the priority assigned to the file definition information of the selected file is changed to the highest priority. Then, all the file definition information is rearranged based on the priority given to all the file definition information. That is, the file definition information to which the highest priority is assigned is arranged at the head of all the file definition information.

  For example, it is assumed that the file definition information (1) to (5) are arranged in order. That is, it is assumed that high priority is given in the order of file definition information (1) to (5). When the file definition information (3) is selected and the priority given to the file definition information (3) is changed to the highest priority, the file definition information (3), (1), (2), They are rearranged in the order of (4) and (5). Note that the file definition information (1) can always be arranged at the head by giving a universal highest priority to the file definition information (1).

  Next, rearrangement control of file definition information based on priority change prohibition information will be described. The basic concept is the same as the file definition information rearrangement process described with reference to FIGS.

  For example, it is assumed that the file definition information (1) to (5) are arranged in order, and priority change prohibition information is given to the file definition information (3). That is, it is assumed that high priority is given in the order of file definition information (1) to (5). In this case, even if the file definition information (3) is listed as a transfer target, the priority of the file definition information (3) cannot be changed. As a result, the file definition information (1) to (5) is arranged. Does not change.

  Next, rearrangement control of file definition information based on rearrangement prohibition information will be described. The basic concept is the same as the file definition information rearrangement process described with reference to FIGS.

  For example, it is assumed that the file definition information (1) to (5) are arranged in order, and the reordering prohibition information is given to the file definition information (2). In this case, if the file definition information (3) is listed as a movement target, the file definition information (3) is arranged at the head, but the position of the file definition information (2) is not changed. That is, the file definition information (3), (2), (1), (4), and (5) are rearranged in this order. It should be noted that the file definition information (1) can always be arranged at the head by giving the sort prohibition information to the file definition information (1).

  This embodiment will be summarized below.

  (1) When performing a predetermined process (file data read process or write process) after searching for a file, the IC card increases the priority of the search for the target file during the process and performs a predetermined process after searching the file. If the above processing is not performed, the search priority of the processing target file is not changed. As a result, the file definition information is arranged in the order of the most recent work. As a result, the file management information that has been recently worked in chronological order can reduce the search time. Also, the time for searching for a specific file can be shortened only when the file data is read and written.

  (2) When the IC card performs a predetermined process (file data read process or write process) after the file search, the priority change prohibition information is not given to the target file during the process. If the search priority of this file is increased and the specified process is not performed after the file search, or priority change prohibition information is given to the target file during the process , Do not change the search priority of the processing target file. As a result, the file definition information is arranged in the order of the most recent work. As a result, the file management information that has been recently worked in chronological order can reduce the search time. In addition, if there is management information that you do not want to move from the beginning of the management information storage area, files with that management information can be processed without changing the search order so that the time for searching for a specific file can be reduced. become. Also, the time for searching for a specific file can be shortened only when the file data is read and written.

  As described above, the IC card according to the present embodiment can rearrange the file definition information in the order of selection and work performed before. As a result, it is possible to improve the selection speed of the file that was previously worked.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

1 is a block diagram showing a schematic configuration of an IC card system according to an embodiment of the present invention. It is a block diagram which shows schematic structure of the IC card which concerns on one Embodiment of this invention. It is a figure which shows an example of several file definition information (file definition information (1)-(n)) stored in the definition information storage area. It is a flowchart which shows an example of the file selection process based on command reception in an IC card. It is a flowchart which shows an example of a definition information rearrangement process. It is a state transition diagram which shows an example of a definition information rearrangement process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Terminal, 2 ... IC card, 11 ... Main body, 12 ... Display, 13 ... Keyboard, 14 ... Card reader / writer, 21 ... Contact part, 22 ... Control part, 23 ... RAM, 24 ... ROM, 25 ... Nonvolatile memory

Claims (11)

An information storage medium comprising a card body in which a module is embedded,
The module is
Communication means for communicating with the media processing device;
Storage means for storing a plurality of files and storing a plurality of file management information for managing the plurality of files in a predetermined arrangement;
File selection means for selecting a predetermined file from the plurality of files based on a command received via the communication means;
Data processing means for executing predetermined processing based on the file selected by the file selection means;
Relocation means for relocating a plurality of file management information based on a file selection result by the file selection means;
An information storage medium comprising:   The information storage medium according to claim 1, wherein the rearrangement unit arranges file management information of the file selected by the file selection unit at the head of all file management information.   The information storage medium according to claim 1, wherein the rearrangement unit rearranges a plurality of file management information based on a file selection result by the file selection unit on condition that execution of a predetermined process by the data processing unit.   The information storage medium according to claim 3, wherein the predetermined process is at least one of file reading and writing. An information storage medium comprising a card body in which a module is embedded,
The module is
Communication means for communicating with the media processing device;
Storage means for storing a plurality of files, and storing a plurality of file management information for managing the plurality of files in a predetermined arrangement based on a priority given to the plurality of file management information;
File selection means for selecting a predetermined file from the plurality of files based on a command received via the communication means;
Data processing means for executing predetermined processing based on the file selected by the file selection means;
Relocation means for changing the priority given to the file management information of the file selected by the file selection means and rearranging the plurality of file management information based on the priority given to the plurality of file management information When,
An information storage medium comprising:   The rearrangement unit changes the priority assigned to the file management information of the file selected by the file selection unit to the highest priority, and the file management information to which the highest priority is given is included in all file management information The information storage medium according to claim 5, wherein the information storage medium is disposed at the top of the information storage medium.   The rearrangement unit changes the priority given to the file management information of the file selected by the file selection unit on the condition that execution of the predetermined processing by the data processing unit, and gives the plurality of file management information 6. The information storage medium according to claim 5, wherein the plurality of file management information are rearranged based on the priorities set.   The information storage medium according to claim 7, wherein the predetermined process is at least one of file reading and writing.   The rearrangement means, based on the priority change prohibition information given to the file management information of the file selected by the file selection means, the priority given to the file management information of the file selected by the file selection means The information storage medium according to claim 5, wherein the information storage medium is not changed. A file rearrangement method in an information storage medium constituted by a card body in which a module is embedded,
Storing a plurality of files and storing a plurality of file management information for managing the plurality of files in a predetermined arrangement;
Based on an external command, a predetermined file is selected from the plurality of files,
Performing a process based on the selected file;
Relocating the plurality of file management information based on the file selection result;
File relocation method. A file rearrangement method in an information storage medium constituted by a card body in which a module is embedded,
Storing a plurality of files and storing a plurality of file management information for managing the plurality of files in a predetermined arrangement based on a priority given to the plurality of file management information;
Based on an external command, a predetermined file is selected from the plurality of files,
Performing a process based on the selected file;
Changing the priority given to the file management information of the selected file, and rearranging the plurality of file management information based on the priority given to the plurality of file management information;
A file relocation method characterized by the above.

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