JP2006072426A - Wireless ic tag, information processing system, wireless ic tag control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the reliability of a wireless IC tag by an error detection correcting function. <P>SOLUTION: An information processor 100 performs writing and reading to the wireless IC tag 30 through a reader/writer 200. At the time of reading, a control part 12 outputs an address signal and a write data signal 20, an error detection correction code generator 13 generates an error detection correction code 21, a composer 14 couples the write data signal 20 with the error detection correction code 21, and a memory 15 writes data with error detection correction code in the inner part. At the time of reading, the control part 12 outputs an address signal, and the memory 15 outputs data with error detection correction code according to the address signal. An error detection correction part 16 inspects the data with error detection correction code, outputs a non-correctable error signal 25 or a correctable signal, and corrects and outputs, in a case that the data are correctable, the data as a read data signal 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless IC tag, an information processing system, a wireless IC tag control method, and a program, and more particularly to a wireless IC tag, an information processing system, a wireless IC tag control method, and a program with improved reliability.

  Wireless IC tags include a read-only type, a read type, a write type, and the like, and a type in which a memory that stores data is mounted (for example, Patent Document 1).

  Further, as a technique for improving the reliability of the memory, there is an ECC (Error Collection Code) technique (for example, Patent Document 2).

JP 2003-317050 A JP 2000-163273 A

  The problem with the technique described in Patent Document 1 is that when an error occurs in a wireless IC tag, the error propagates.

  The reason is that no error correction function is installed.

  The technique described in Patent Document 2 relates to ECC, but is not configured to be used for a wireless IC tag.

  An object of the present invention is to realize a wireless IC tag, an information processing system, a wireless IC tag control method, or a program that detects and corrects an error in a built-in memory and improves reliability.

  The first wireless IC tag of the present invention detects a error by checking a memory for storing data and an error detection and correction code corresponding to the data as data with an error detection and correction code, and data with an error detection and correction code read from the memory. Otherwise, it has an error detection / correction unit that outputs data from the memory as read data and corrects the data and outputs it as read data when a correctable error is detected.

  A second wireless IC tag according to the present invention includes a memory that stores data and an error detection correction code corresponding to the data as data with an error detection correction code, and an error that generates an error detection correction code corresponding to the data and outputs the error detection correction code to the memory. Check the data with error detection and correction code read from the memory and the detection and correction code generator. If no error is detected, the data from the memory is output as read data. If a correctable error is detected, the data is corrected. And an error detection and correction unit that outputs the read data.

  The third wireless IC tag according to the present invention is the first or second wireless IC tag, and when the data with error detection and correction code is checked and an uncorrectable error is detected, an uncorrectable error signal is generated. It has the said error detection correction part to output, It is characterized by the above-mentioned.

  The fourth wireless IC tag of the present invention is the third wireless IC tag, which outputs a write instruction / read instruction signal and an address signal to the memory, and cannot be corrected from the error detection / correction unit. A control unit that inputs and outputs an error signal, a modulation demodulator that modulates an uncorrectable error signal from the control unit and outputs a carrier wave, and an antenna that transmits the carrier wave from the modulation demodulator. Features.

  A fifth wireless IC tag of the present invention is the first, second, or third wireless IC tag, and outputs the correctable error signal upon detecting a correctable error; And a counter that changes a count value in accordance with a correctable error signal from the error detection and correction unit.

  A sixth wireless IC tag according to the present invention is the fourth wireless IC tag, wherein the error detection and correction unit that outputs a correctable error signal when a correctable error is detected, and the correction from the error detection and correction unit And a counter that changes a count value according to a possible error signal.

  The seventh wireless IC tag of the present invention is the fifth wireless IC tag, wherein the counter outputs a correctable error frequent signal when the count value exceeds a preset threshold value, and the memory is written to the memory A control unit that outputs an instruction / read instruction signal and an address signal, inputs and outputs a correctable error frequent signal from the counter, and modulates the correctable error frequent signal from the control unit and outputs a carrier wave It has a demodulator and an antenna for transmitting a carrier wave from the modulation demodulator.

  The eighth wireless IC tag of the present invention is the sixth wireless IC tag, wherein the counter outputs a correctable error frequent signal when the count value exceeds a preset threshold value, and the counter The control unit that inputs and outputs a correctable error frequent signal, the modulation demodulator that modulates the correctable error frequent signal from the control unit and outputs a carrier wave, and the antenna that transmits the carrier wave from the modulation demodulator It is characterized by having.

  The first information processing system of the present invention includes: the fourth wireless IC tag; a reader / writer that receives a carrier wave from the fourth wireless IC tag, demodulates and outputs an uncorrectable error signal; And an information processing apparatus that inputs an uncorrectable error signal from the reader / writer and stores or displays the error signal therein.

  The second information processing system of the present invention receives the seventh or eighth wireless IC tag and a carrier wave from the seventh or eighth wireless IC tag, demodulates and corrects the error. It has a reader / writer that outputs a frequent signal, and an information processing device that inputs a correctable error frequent signal from the reader / writer and stores or displays it inside.

  The first wireless IC tag control method of the present invention examines data with error detection correction code read from a memory that stores data and corresponding error detection correction code as data with error detection correction code in the wireless IC tag. It includes a procedure, a procedure for outputting data from the memory as read data when no error is detected, and a procedure for correcting and outputting data as read data when a correctable error is detected.

  In the second wireless IC tag control method of the present invention, an error detection / correction code corresponding to data is generated in the wireless IC tag, and the error detection / correction code corresponding to the data is used as data with error detection / correction code as the memory. The data stored in the memory, the procedure for examining the data with error detection and correction code read from the memory, the procedure for outputting the data from the memory as read data if no error is detected, and the data when the correctable error is detected, And a procedure of correcting the error and outputting it as read data.

  A third wireless IC tag control method according to the present invention is the first or second wireless IC tag control method, wherein the data with error detection and correction code is checked, and if an uncorrectable error is detected, the correction is not possible. And a procedure for outputting a possible error signal.

  A fourth wireless IC tag control method according to the present invention is the third wireless IC tag control method, wherein a write instruction / read instruction signal and an address signal are output to the memory, and an uncorrectable error. And a procedure of modulating a signal and transmitting a carrier wave wirelessly.

  The first program of the present invention is a procedure for examining data with error detection and correction code read from a memory for storing data and corresponding error detection and correction code as data with error detection and correction code; The wireless IC tag executes a procedure for outputting data from the memory as read data and a procedure for correcting the data and outputting it as read data when a correctable error is detected.

  The second program of the present invention generates an error detection and correction code corresponding to data, stores the data and the corresponding error detection and correction code in the memory as data with an error detection and correction code, and reads from the memory A procedure for checking data with error detection and correction code, a procedure for outputting data from the memory as read data if no error is detected, and a procedure for correcting and outputting data as read data when a correctable error is detected. Is performed by the wireless IC tag.

  A third program according to the present invention is the first or second program, wherein the error detection / correction code-added data is checked, and when an uncorrectable error is detected, an uncorrectable error signal is output. The wireless IC tag is executed.

  A fourth program according to the present invention is the third program, wherein a write instruction / read instruction signal and an address signal are output to the memory, and an uncorrectable error signal is modulated to generate a carrier wave wirelessly. The wireless IC tag executes a transmission procedure.

  A ninth wireless IC tag according to the present invention is the first, second, third, fourth, fifth, sixth, seventh, or eighth wireless IC tag, wherein the rewritable area and the non-rewritable area. Including the memory.

  The effect of the present invention is that the reliability of the wireless IC tag is improved.

  Next, a first best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the first best mode for carrying out the present invention.

  Referring to FIG. 1, the first best mode for carrying out the present invention includes an information processing apparatus 100, a reader / writer 200, and a wireless IC tag 300.

  The information processing apparatus 100 is a computer such as a server, and processes data input from the wireless IC tag 300 via the reader / writer 200.

  The reader / writer 200 is a reading / writing device for the wireless IC tag 300, and transmits a control signal, reads data in the wireless IC tag 300, and writes data in the wireless IC tag 300 by wireless. Do. In the reader / writer 200, there is an antenna that transmits and receives a carrier wave (data signal and control signal) facing the antenna 10 of the wireless IC tag 300.

  The wireless IC tag 300 includes an antenna 10, a modulation demodulator 11, a control unit 12, an error detection / correction code generator 13, a combiner 14, a memory 15, and an error detection / correction unit 16.

  The antenna 10 has a function of transmitting a carrier wave (data signal and control signal) received wirelessly from the reader / writer 200 to the modulation demodulator 11, and a carrier wave (data signal and control signal received from the modulation demodulator 11). ) To the reader / writer 200 wirelessly.

  The modulation demodulator 11 demodulates the carrier wave input from the antenna 10, extracts the data and the control signal and outputs them to the control unit 12, and modulates the data input from the control unit 12 and the control signal into the carrier wave And a function of outputting to the antenna 10.

  The control unit 12 has a function of outputting the data input from the modulation demodulator 11 to the error detection and correction code generator 13 and the combiner 14 as a write data signal 20. Further, the control unit 12 outputs a control signal 22 (write instruction / read instruction signal and address signal) to the memory 15. The control unit 12 further includes a read data signal 23 from the error detection / correction unit 16 and a correctable error signal 26 (a signal indicating that an error has been detected in the data read from the memory 15 and the error has been corrected). ) And an uncorrectable error signal 25 (a signal indicating that an error is detected in the data read from the memory 15 but the error cannot be corrected).

  The error detection / correction code generator 13 has a function of generating an error detection / correction code 21 for the data input from the control unit 12 and outputting the error detection / correction code 21 to the synthesizer 14.

  The synthesizer 14 has a function of connecting the data input from the control unit 12 and the error detection / correction code 21 input from the error detection / correction code generator 13 and outputting the data to the memory 15 as data with an error detection / correction code.

  The memory 15 writes and holds the data with the error detection and correction code input from the synthesizer 14 according to the control signal 22 (write instruction / read instruction signal and address signal) from the control unit 12; It has a function of reading data with an error detection / correction code and outputting it to the error detection / correction unit 16.

  The error detection and correction unit 16 has a function of examining the data with the error detection and correction code read from the memory 15 and outputting the data portion as it is to the control unit 12 as it is if no error is detected. . The error detection and correction unit 16 has a function of checking the data with the error detection and correction code and outputting a correctable error signal 26 and a read data signal 23 in which the error is corrected to the control unit 12 when a correctable error is detected. Have. The error detection / correction unit 16 has a function of checking the data with the error detection / correction code and outputting an uncorrectable error signal 25 to the control unit 12 when an uncorrectable error is detected.

  Although an error detection and correction method is not defined, for example, a general ECC (Error Collection Code) can be used as the error detection and correction code 21.

  Next, the operation of the first best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 2 is a flowchart showing the operation of the first best mode for carrying out the present invention.

  FIG. 3 is a flowchart showing the operation of the first best mode for carrying out the present invention.

  FIG. 4 is a flowchart showing the operation of the first best mode for carrying out the present invention.

  First, an operation of writing data from the information processing apparatus 100 to the wireless IC tag 300 will be described.

  Referring to FIG. 2, when data is written from the information processing apparatus 100 to the wireless IC tag 300, the information processing apparatus 100 outputs a write instruction signal, an address (for the memory 15), and write data to the reader / writer 200. (FIG. 2, step T1). Next, the reader / writer 200 places the input write instruction signal, address, and write data on a carrier wave and wirelessly transmits them to the antenna 10 of the wireless IC tag 300 (step T2). The antenna 10 outputs the received carrier wave to the modulation demodulator 11 (step T3). The modulation demodulator 11 demodulates the carrier wave and outputs a write instruction signal, an address, and write data to the control unit 12 (step T4). The control unit 12 transmits the write data signal 20 to the error detection / correction code generator 13 and the synthesizer 14, and also sends a control signal 22 (write instruction / read instruction signal (write instruction) to the memory 15. , And an address signal) (step T5). The error detection / correction code generator 13 generates and outputs an error detection / correction code 21 for the input write data signal 20 (step T6). The synthesizer 14 connects the write data signal 20 and the error detection / correction code 21 and outputs the data to the memory 15 as data with an error detection / correction code (step T7). The memory 15 writes the data with the error detection and correction code from the synthesizer 14 in accordance with the control signal 22 from the control unit 12 (step T8).

  Next, an operation in which the information processing apparatus 100 reads data from the wireless IC tag 300 will be described.

  When the information processing apparatus 100 reads data from the wireless IC tag 300, the information processing apparatus 100 outputs a reading instruction signal and an address (for the memory 15) to the reader / writer 200 (step R1 in FIG. 3). Next, the reader / writer 200 places a read instruction signal and an address on a carrier wave and wirelessly transmits them to the antenna 10 of the wireless IC tag 300 (step R2).

  The antenna 10 outputs the received carrier wave to the modulation demodulator 11 (step R3). The modulation demodulator 11 demodulates the carrier wave and outputs a read instruction signal and an address to the control unit 12 (step R4). The control unit 12 outputs a control signal 22 (a write instruction / read instruction signal (read instruction) and an address signal) to the memory 15 (step R5). The memory 15 reads the data with the error detection / correction code from the inside in accordance with a write instruction / read instruction signal (instruction for reading) from the control unit 12, and outputs the data to the error detection / correction unit 16 (step R6).

  The error detection / correction unit 16 checks the data with the error detection / correction code (step R7). If no error is detected (step R7 / No), the error detection / correction unit 16 outputs the data as it is to the control unit 12 as a read data signal 23 as it is (step R8). The control unit 12 outputs the read data signal 23 input from the error detection / correction unit 16 to the modulation demodulator 11 (step R9). The modulation demodulator 11 modulates the read data signal, places it on a carrier wave, and outputs it to the antenna 10 (step R10). The antenna 10 wirelessly transmits the carrier wave from the modulation demodulator 11 (step R11).

  Next, the reader / writer 200 receives the carrier wave from the antenna 10 of the wireless IC tag 300, demodulates it, and outputs the read data to the information processing apparatus 100 (step R12). Next, the information processing apparatus 100 inputs read data from the reader / writer 200 and stores it in the internal storage device (step R13).

  Next, an operation when there is an error in the data recorded in the memory 15 of the wireless IC tag 300 will be described.

  When detecting an error (step R7 / Yes in FIG. 3), the error detection and correction unit 16 checks whether the error can be corrected or cannot be corrected (step Y1 in FIG. 4). If the error cannot be corrected (step Y1 / No), the error detection and correction unit 16 outputs an uncorrectable error signal 25 to the control unit 12 (step Y2). The control unit 12 outputs the uncorrectable error signal 25 input from the error detection / correction unit 16 to the modulation demodulator 11 (step Y3). The modulation demodulator 11 modulates the uncorrectable error signal, puts it on a carrier wave, and outputs it to the antenna 10 (step Y4). The antenna 10 wirelessly outputs the carrier wave from the modulation demodulator 11 (step Y5).

  Next, the reader / writer 200 receives the carrier wave from the antenna 10 of the wireless IC tag 300, demodulates it, and outputs an uncorrectable error signal to the information processing apparatus 100 (step Y6). Next, the information processing apparatus 100 receives an uncorrectable error signal from the reader / writer 200, stores it in the internal storage device (step Y7), and displays the presence of the uncorrectable error signal on a display or the like (step S7). Y8).

  If the error can be corrected (step Y1 / Yes), the error detection / correction unit 16 controls the correctable error signal 26 and the read data signal 23 which is data obtained by correcting the error based on the error detection / correction code. 12 (step Y9). The control unit 12 outputs the correctable error signal 26 and the read data signal 23 input from the error detection / correction unit 16 to the modulation demodulator 11 (step Y10). The modulation demodulator 11 modulates the correctable error signal and the read data signal, puts them on a carrier wave, and outputs them to the antenna 10 (step Y11). The antenna 10 wirelessly transmits the carrier wave from the modulation demodulator 11 (step Y12).

  Next, the reader / writer 200 receives and demodulates the carrier wave from the antenna 10 of the wireless IC tag 300, and outputs a correctable error signal and read data to the information processing apparatus 100 (step Y13). Next, the information processing apparatus 100 inputs a correctable error signal and read data from the reader / writer 200 and stores them in the internal storage device (step Y14). Next, the information processing apparatus 100 accumulates the number of input correctable error signals, and when the accumulated number exceeds a preset threshold value (step Y15 / Yes), the accumulated number of correctable error signals reaches the threshold value. Information indicating that it has been exceeded is displayed on a display or the like (step Y16).

  The wireless IC tag 300 may be a type in which a battery is mounted on itself or a type in which a battery is not mounted. In addition, when writing data to the memory 15, the error detection / correction code generator 13 generates the error detection / correction code 21 from the write data signal 20 received from the control unit 12. A configuration in which an error detection correction code is added and output, and the wireless IC tag 300 writes the error detection correction code in the memory 15 is also possible. In this case, the error detection / correction code generator 13 and the synthesizer 14 become unnecessary.

  If a single address memory 15 (or a register or the like) is used, no address is required.

  Next, an embodiment of the memory 15 will be described in detail with reference to the drawings.

  FIG. 5 is an explanatory diagram showing an example of the contents of the memory 15.

  Referring to FIG. 5, data with error detection / correction code is stored in each address of the memory 15. The memory 15 includes, for example, an ID area and a user area. The ID area is an area for storing an identification code of the wireless IC tag 300, and a unique value is written in a manufacturing factory or the like. The ID area can be read from the information processing apparatus 100 but cannot be written. The user area is an area that can be read and written from the information processing apparatus 100. For example, the ID area can be composed of a ROM (Read Only Memory), and the user area can be composed of an EPROM (Electronic Programmable Read Only Memory).

  As described above, in the first best mode for carrying out the present invention, there is an effect that the reliability of the wireless IC tag 300 is improved by the error detection and correction function.

  There is also an effect that the occurrence of an uncorrectable error can be easily observed.

  There is also an effect that it is possible to observe that correctable errors occur frequently.

  Next, a second best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 6 is a block diagram showing the configuration of the second best mode for carrying out the present invention.

  The second best mode for carrying out the present invention is a configuration in which a counter 18 is added in the wireless IC tag 300 of the first best mode for carrying out the present invention. The counter 18 has a function of inputting a correctable error signal 26 and changing the count value. The counter 18 includes a threshold register in which a threshold is set in advance. The counter 18 compares the count value with the threshold value in the threshold register, and outputs a comparison result signal 29 indicating the comparison result to the control unit 12.

  Next, the operation of the second best mode for carrying out the present invention will be described.

  FIG. 7 is a flowchart showing the operation of the second best mode for carrying out the present invention.

  With reference to FIG. 7, an operation when a correctable error exists in the data recorded in the memory 15 of the wireless IC tag 300 will be described.

  When the error can be corrected (step Y1 / Yes), the error detection / correction unit 16 outputs a correctable error signal 26 to the counter 18, and based on the correctable error signal 26 and the error detection / correction code. The data with the error corrected is output to the control unit 12 as a read data signal 23 (step Z1 in FIG. 7). The counter 18 changes the count value based on the correctable error signal 26 (for example, counts up), compares the count value with the threshold value in the internal threshold value register, and outputs a comparison result signal 29 indicating the comparison result. (Step Z2).

  When the comparison result signal 29 from the counter 18 indicates that “the count value exceeds the threshold value” (step Z3 / Yes), the control unit 12 and the error detection and correction unit 16 Is output to the modulation demodulator 11 (step Z4). If the comparison result signal 29 from the counter 18 does not indicate that “the count value exceeds the threshold” (step Z3 / No), the control unit 12 receives the read data signal 23 input from the error detection and correction unit 16. It outputs to the modulation demodulator 11 (step Z5).

  The correctable error frequent signal is input to the information processing apparatus 100 via the modulation demodulator 11 and the antenna 10 (step Z6), and further via the reader / writer 200 (step Z7). When the correctable error frequency signal is input, the information processing apparatus 100 displays information indicating that “correctable errors occur frequently” on a display or the like (step Z8).

  The operation of the second best mode for carrying out the present invention in steps Y11 to Y14 in FIG. 4 is the same as that of the present invention except that a correctable error frequent signal is used instead of the correctable error signal. This is the same as the first best mode for carrying out.

  The operations other than those described above are the same as those in the first best mode for carrying out the present invention, and thus description thereof will be omitted.

  As described above, in the second best mode for carrying out the present invention, the counter 18 provided in the wireless IC tag 300 is provided to count the number of occurrences of the correctable error signal 26. Therefore, the present invention is implemented. Compared to the first best mode for doing so, there is an effect that the processing load on the information processing apparatus 100 is reduced and the overall processing time is shortened.

  Next, a third best mode for carrying out the present invention will be described with reference to the drawings.

  A third best mode for carrying out the present invention is a method including the steps of FIGS. 2 to 4 and 7.

  Next, a fourth best mode for carrying out the present invention will be described with reference to the drawings.

  The fourth best mode for carrying out the present invention is a program when the wireless IC tag 300 is controlled by firmware. This program is stored and executed in a control store (not shown), and causes the wireless IC tag 300 to execute the steps of FIGS. 2 to 4 and 7. A program that causes the reader / writer 200 and the information processing apparatus 100 to execute the steps of FIGS. 2 to 4 and 7 is also possible.

The block diagram which shows the structure of the 1st best form for implementing this invention. The flowchart which shows operation | movement of the 1st best form for implementing this invention. The flowchart which shows operation | movement of the 1st best form for implementing this invention. The flowchart which shows operation | movement of the 1st best form for implementing this invention. FIG. 2 is an explanatory diagram illustrating an example of contents of a memory in FIG. 1. The block diagram which shows the structure of the 2nd best form for implementing this invention. The flowchart which shows the operation | movement of the 2nd best form for implementing this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antenna 11 Modulation demodulator 12 Control part 13 Error detection correction code generator 14 Synthesizer 15 Memory 16 Error detection correction part 18 Counter 20 Write data signal 21 Error detection correction code 22 Control signal 23 Read data signal 25 Uncorrectable error signal 26 Correctable error signal 29 Comparison result signal 100 Information processing device 200 Reader / writer 300 Wireless IC tag

Claims (19)

The data and the error detection and correction code corresponding to the data are stored as data with error detection and correction code, and the data with error detection and correction code read from the memory is examined. If no error is detected, the data from the memory is read and read. A wireless IC tag comprising: an error detection and correction unit that outputs data as read data when a correctable error is detected. Memory for storing data and corresponding error detection / correction code as data with error detection / correction code, error detection / correction code generator for generating error detection / correction code corresponding to data and outputting to the memory, and reading from the memory If the error detection and correction code-added data is checked and no error is detected, the data from the memory is output as read data, and when a correctable error is detected, the data is corrected and output as read data. A wireless IC tag comprising: 3. The wireless IC tag according to claim 1, further comprising: the error detection and correction unit that outputs an uncorrectable error signal when data with an error detection and correction code is checked and an uncorrectable error is detected. A control unit that outputs a write instruction / read instruction signal and an address signal to the memory, inputs and outputs an uncorrectable error signal from the error detection and correction unit, and an uncorrectable error signal from the control unit 4. The wireless IC tag according to claim 3, further comprising: a modulation demodulator that modulates a signal and outputs a carrier wave; and an antenna that transmits the carrier wave from the modulation demodulator. 2. The error detection and correction unit that outputs a correctable error signal when a correctable error is detected, and a counter that changes a count value according to a correctable error signal from the error detection and correction unit. 2. The wireless IC tag according to 2 or 3. 5. The error detection / correction unit that outputs a correctable error signal when a correctable error is detected, and a counter that changes a count value according to a correctable error signal from the error detection / correction unit. Wireless IC tag. The counter that outputs a correctable error frequent signal when the count value exceeds a preset threshold value, and the write instruction / read instruction signal and the address signal are output to the memory, and the correctable error frequent occurrence from the counter A control unit that inputs and outputs a signal, a modulation demodulator that modulates a correctable error frequent signal from the control unit and outputs a carrier wave, and an antenna that transmits the carrier wave from the modulation demodulator The wireless IC tag according to claim 5. The counter that outputs a correctable error frequent signal when the count value exceeds a preset threshold value, the control unit that inputs and outputs the correctable error frequent signal from the counter, and the correctable from the control unit The wireless IC tag according to claim 6, comprising: the modulation demodulator that modulates an error frequent signal and outputs a carrier wave; and the antenna that transmits the carrier wave from the modulation demodulator. 5. The wireless IC tag according to claim 4, a reader / writer that receives a carrier wave from the wireless IC tag, demodulates and outputs an uncorrectable error signal, and an uncorrectable error signal from the reader / writer And an information processing system that stores or displays the information in the information processing system. 9. The wireless IC tag according to claim 7 or 8, a reader / writer that receives a carrier wave from the wireless IC tag, demodulates and outputs a correctable error occurrence signal, and a correctable error from the reader / writer An information processing system comprising: an information processing device that inputs a frequent signal and stores or displays the signal in the inside. In the wireless IC tag, the procedure for examining the data with error detection correction code read from the memory for storing the data and the corresponding error detection correction code as data with error detection correction code, and if no error is detected, from the memory A wireless IC tag control method comprising: a procedure of outputting data as read data; and a procedure of correcting data and outputting it as read data when a correctable error is detected. A procedure for generating an error detection / correction code corresponding to the data in the wireless IC tag, storing the data and the corresponding error detection / correction code in the memory as data with an error detection / correction code, and detecting the error read from the memory It includes a procedure for checking data with a correction code, a procedure for outputting data from the memory as read data if no error is detected, and a procedure for correcting the data and outputting it as read data when a correctable error is detected. A wireless IC tag control method characterized by the above. 13. The wireless IC tag control method according to claim 11 or 12, further comprising a procedure of checking data with error detection and correction code and outputting an uncorrectable error signal when an uncorrectable error is detected. 14. The wireless IC according to claim 13, comprising: a procedure for outputting a write instruction / read instruction signal and an address signal to the memory; and a procedure for modulating an uncorrectable error signal and transmitting a carrier wave wirelessly. Tag control method. Procedure for examining data with error detection correction code read from memory storing data and corresponding error detection correction code as data with error detection correction code, and if no error is detected, output data from said memory as read data A program for causing a wireless IC tag to execute a procedure for performing correction and a procedure for correcting data and outputting it as read data when a correctable error is detected. A procedure for generating an error detection correction code corresponding to the data, storing the data and the corresponding error detection correction code in the memory as data with an error detection correction code, and examining the data with the error detection correction code read from the memory If the wireless IC tag executes a procedure, a procedure for outputting data from the memory as read data if no error is detected, and a procedure for correcting the data and outputting the read data when a correctable error is detected. A featured program. 17. The program according to claim 15 or 16, wherein when the uncorrectable error is detected by checking the data with error detection and correction code, the wireless IC tag executes a procedure for outputting an uncorrectable error signal. The wireless IC tag executes a procedure of outputting a write instruction / read instruction signal and an address signal to the memory and a procedure of modulating an uncorrectable error signal and transmitting a carrier wave wirelessly. 17. The program according to 17. 9. The wireless IC tag according to claim 1, comprising the memory including a rewritable area and a non-rewritable area.

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