JPH0620110A - Data processor using non-contact data carrier - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a data processing device using a contactless data carrier used for fee-based use of facilities and equipment, etc., even if multiple data carriers are accessed at the same time, it is possible to narrow down to a specific data carrier. Allow reading and writing. An ID number reading unit 25 of a data carrier 20 which has received a command from an ID number reading command unit 15 of a reader / writer 10 encodes an ID number of a memory 21 by a reading and coding unit 26 according to a coding rule to make a data carrier. Send back to 20. Decoding unit 1 from encoded data of data carrier 20
After the ID number is restored at 7, it is encoded at the encoding unit 18 and sent back to the data carrier 20. The data carrier 20 collates the ID number restored by the decoding unit 28 with the ID number of the memory 21 by the collating unit 28, and if they coincide with each other, thereafter, reading or writing of part or all of the memory 21 is continued. to approve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device using a non-contact data carrier used for paid use of facilities and equipment.

[0002]

2. Description of the Related Art Conventionally, as a data processing device using a non-contact data carrier known as a so-called data coin, which is used for paid use in a ski lift, a play facility, etc., for example, one shown in FIG. 3 is known. ing. In FIG.
Reference numeral 10 is a reader / writer, and 20 is a data carrier. The reader / writer 10 is fixedly installed, and has a control unit 11 and a reading unit 1.
2, a writing unit 13 and a transmission unit 14 are provided. The data carrier 20 is carried by a user as, for example, a pentant or a wrist watch, and includes a nonvolatile memory 21, such as an E ² PROM, a reading unit 22, a writing unit 23, and a transmission unit 24.

In the operation of such a data processing apparatus, when the data carrier 20 is brought close to the communicable distance of the reader / writer 10, for example, the operating power is supplied from the transmission section 14 of the reader / writer 10 by electromagnetic inductive coupling.
The transmission unit 24 of 0 receives the power and starts power on, and the reader / writer 10 can read and write the contents of the memory 21 of the data carrier 20.

[0004]

However, in the data processing device using such a non-contact data carrier, the data carrier adopting the coupling method of electrically connecting is one-to-one with the reader / writer. However, because of non-contact coupling, two data carriers 20A and 20B may simultaneously enter the communicable distance of the reader / writer 10 as shown in FIG. An error occurs when an access or read access is performed.

That is, two data carriers 20A, 20
When the read access is simultaneously performed to B, the reader / writer receives the data in which the read data of the data carriers 20A and 20B are mixed, and when the write access is performed at the same time, the same data is read as two data. Carrier 2
There was a risk of writing in 0A and 20B. The present invention has been made in view of such conventional problems,
It is an object of the present invention to provide a data processing device using a non-contact data carrier that can read and write only a specific data carrier even if a plurality of data carriers are simultaneously accessed.

[0006]

To achieve this object, the present invention is constructed as follows. Incidentally, the reference numerals of the embodiment drawings are also shown. First, the present invention is directed to a data processing device using a non-contact data carrier for writing data or reading data from the reader / writer 10 to the data carrier 20 by non-contact coupling.

In the present invention as such a data processing apparatus, first, the reader / writer 10 is responsive to the ID number read command means 16 for commanding the data carrier 20 to read the ID number, and the ID number read command. Decoding means 17 for restoring the ID number from the encoded code transmitted from the data carrier 20, and I restored by the decoding means 17.
Coding means 18 for coding the D number according to a predetermined coding rule or a different coding rule and transmitting it to the data carrier 20 is provided.

In addition, the data carrier 20 is provided with a memory 21 based on an ID number read command received from the reader / writer 10.
ID number reading means 2 for reading the unique ID number stored in
5, coding means 26 for coding the ID number read by the ID number reading means 25 according to a predetermined coding rule and transmitting it to the reader / writer 10, and a code returned from the reader / writer 10 after the transmission of this coded data. Decoding means 27 for restoring the ID number from the decoding code, and decoding means 27
The ID number restored in step 2 is collated with the ID number of the memory 21, and when it is determined that the ID numbers match, a collating means 28 for permitting access (reading or writing) of part or all of the memory 21 is provided.

[0009]

According to the data processing apparatus using the non-contact data carrier of the present invention having such a configuration, the ID number of the memory is read from the data carrier based on the command from the reader / writer and encoded. It responds as a code, restores the ID number from this encoded code, returns it to the data carrier as encoded data similarly encoded, and restores the ID number. The restored ID number and the memory ID
Only when a matching match with the number is obtained, subsequent memory access is permitted.

Therefore, even if two or more data carriers exist simultaneously in the communication area of the reader / writer, the ID
A process for permitting memory access based on the exchange of encoded data with a data carrier that has received a read command of a number is performed, and other data carriers are stored in the memory even if the ID number is restored from the encoded code. Since the ID number does not match, the memory access is not permitted, and the access target can be limited to one.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an embodiment showing one embodiment of the present invention. In FIG. 1, 10 is a reader / writer,
Control unit 11 using MPU, transmission unit 14, writing / reading unit 1
5, an ID number read command unit 16, a decoding unit 17, and an encoding unit 18 are provided.

Numeral 20 is a data carrier, and E ²
A non-volatile memory 21 using a PROM, a transmission unit 24,
An ID number reading unit 25, an encoding unit 26, a decoding unit 27, a collating unit 28, a writing / reading unit 29, and a permission gate unit 30 are provided. The memory 21 of the data carrier 20 has a unique I
The D number is stored. The ID numbers may be duplicated if the use of two or more data carriers for the reader / writer 10 can be stochastically sufficiently separated. Further, the ID number may be fixed data or variable data, or may be data obtained by adding variable data to fixed data.

The ID number reading unit 25 of the data carrier 20
When the ID number read command (ID number read command) from the ID number read command unit of the reader / writer 10 is received, the ID number of the memory 21 is read and sent to the encoding unit 26.
The encoding unit 26 uses the memory 2 according to a predetermined encoding rule.
The ID number read from 1 is converted into encoded data.
An appropriate coding rule can be used as the coding rule for generating the coded data from the ID number. Specifically, the following can be considered.

A predetermined code code is added to the ID number code for coding. A predetermined code code is subtracted from the ID number code for coding. Encoding is performed by multiplying the ID number code by a predetermined code coefficient. The encoded data encoded by the encoding unit 26 is decoded by the decoding unit 17 via the ID number read command unit 16 of the reader / writer 10.
The original ID number is restored from the encoded data by the inverse conversion of the same encoding rule as that of the data carrier 20 side. I of the data carrier 20 restored by the decoding unit 17
The D number is given to the encoding unit 18 under the control of the control unit 11, is converted into encoded data again according to the same encoding rule as the encoding unit 26 of the data carrier 20 or different encoding rule, and the data carrier 20 Sent to.

The coded data from the reader / writer 10 has its ID number restored in the decoding section 27 of the data carrier 20 and is given to the collating section 28. At this time, the collating unit 28
Is given an ID number directly read from the memory 21 by the ID number reading unit 25, and collation with the restored ID number is performed. If the ID number restored by the collating unit 28 and the ID number read out from the memory 21 match, the permission gate unit 30 is set in the permitting state, and the write / read unit 29 causes the memory 2
The access of 1 is continuously permitted thereafter. I in the collating unit 28
If the D numbers do not match, the prohibition state of the permission gate unit 30 is held.

Here, the memory 2 by the permission gate unit 30
As for the access permission of No. 1, only read access may be permitted, only write access may be permitted, and both write and read access may be permitted. . Further, the write or read access may be permitted for part or all of the memory 21.

Data transmission by non-contact coupling by the transmission units 14 and 24 of the reader / writer 10 and the data carrier 20 is performed by inductive coupling using an electromagnetic induction coil, for example. For example, from the reader / writer 10 to the data carrier 2
Regarding data transmission for 0, FSK modulation is performed on the reader / writer 10 side, and FSK demodulation is performed on the data carrier 20. At this time, the power supply power of the data carrier 20 is obtained by rectifying the FSK reception signal.

From the data carrier 20 to the reader / writer 10
The spread spectrum communication system is adopted for the data transmission to. That is, the transmission unit 24 of the data carrier 20 has, for example, a pseudo-random sequence corresponding to the data bit 1, for example, an M sequence, transmits the M sequence signal to the reader / writer 10 with the data bit 1, and transmits the M sequence with the data bit 0. Stop sending signals.

The transmission section 14 of the reader / writer 10 holds the same reference M-sequence signal as the M-sequence signal on the data carrier 20 side as a reference value, and calculates the correlation between the reference M-sequence signal and the received signal. When the peak value is obtained, the reception of the data bit 1 is determined, and when the peak value is not obtained, the reception of the data bit 0 is determined. Of course, other than electromagnetic inductive coupling, optical transmission or wireless transmission may be used.

FIG. 2 is a flow chart showing the processing operation in the embodiment of FIG. 1, and shows the respective processing of the reader / writer 10 and the data carrier 20 and the exchange between them. In FIG. 2, when the data carrier 20 enters the communicable area of the reader / writer 10, the data carrier 20 receives power from the reader / writer 10 and powers on and starts in step S201.
At 100, a ready response is returned to the test command issued periodically. The reader / writer 10 is step S101.
The presence / absence of the ready response is monitored in step S11. When the ready response is obtained, the process proceeds to step S102, and an ID number read command is issued.

In response to this ID number read command, the data carrier 20 reads the ID number from the memory in step S202, and transfers the coded data according to a predetermined coding rule in step S203. The reader / writer 10 receives the encoded data from the data carrier 20 and decodes the ID number in step S103. Then step S1
The ID number restored in 04 is encoded again according to the same coding rule or a different coding rule and sent to the data carrier 20.

The data carrier 20 has an ID from the encoded data transmitted from the reader / writer 10 in step S204.
ID that decrypts the number and is restored in the next step S205
The number is collated with the ID number read directly from the memory 21. As a result of this collation, if the two ID numbers match, the process proceeds to step S208, the access to the memory 21 is permitted, and based on the response of the access permission, the reader / writer 10 performs the write access to the data carrier 20 in the step S105. A read access is performed, and the data carrier 20 performs a write operation or a read operation according to the requested access in step S209.

On the other hand, if the ID numbers do not match in step S206, the flow advances to step S207 to hold the memory access prohibited state. When the ID numbers do not match, the reader / writer 10 repeats the processing of steps S102 to S104 and performs the retry operation for obtaining the memory access permission. Even if the retry operation for requesting access permission of this memory is performed, the ID
If the numbers still do not match, the reader / writer 10 abnormally terminates the access permission request processing for the data carrier 20 when the predetermined number of retries is reached.

By the processing operation of the present invention, even if two data carriers 20A and 20B exist in the communicable area of the reader / writer 10 as shown in FIG. 4, for example,
First, the ID number read command is received, and the data access can be focused on one data carrier for which the ID number read process is started, and the memory access is permitted to perform the reading or writing. Further, in the embodiment of FIG. 1, the ID number read from the data carrier 20 is converted into encoded data according to the encoding rule and sent to the reader / writer 10 to be restored, and again encoded and sent to the data carrier 20. Although it is restored and collated, the read ID number may be directly exchanged with the reader / writer.

[0025]

As described above, according to the present invention, even if the reader / writer is illegally used to read or write by using two or more data carriers at the same time, one data carrier is used. Since the memory access is narrowed down, the security performance of the data processing device using the contactless data carrier can be improved.

Further, even if there are two or more data carriers in the communicable area of the reader / writer, access can be focused on a specific data carrier, and therefore duplicate reading and writing on two or more data carriers is obviated. Can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing the processing operation of the present invention.

FIG. 3 is an explanatory view of a conventional device.

FIG. 4 is an explanatory diagram of a state in which two data carriers are included in a communication range of a reader / writer.

[Explanation of symbols]

 10: reader / writer 11: control unit (MPU) 14, 24: transmission unit 15, 29: write / read unit 16: ID number read command unit 17, 27: decoding unit 18, 26: encoding unit 20: data carrier 21: memory 25: ID number reading unit 28: collating unit 30: permission gate unit

Claims (3)

[Claims] 1. A data processing device using a non-contact data carrier for writing data or reading data from the reader / writer to the data carrier by non-contact coupling, wherein the reader / writer has an ID number assigned to the data carrier. ID number read command means for commanding reading, decoding means for restoring the ID number from the coded code transmitted from the data carrier in response to the ID number read command, and the ID number restored by the decoding means Is provided according to a predetermined encoding rule and is transmitted to the data carrier. The data carrier is provided with an ID received from a reader / writer.
ID number reading means for reading the unique ID number stored in the memory based on the number reading command, and coding for coding the ID number read by the ID number reading means according to a predetermined coding rule and transmitting it to the reader / writer. Means, decoding means for restoring the ID number from the encoded code returned from the reader / writer after transmitting the encoded data, and the ID number restored by the decoding means and the ID number of the memory. A data processing apparatus using a non-contact data carrier, characterized in that it is provided with collating means. 2. A data processing apparatus using the non-contact data carrier according to claim 1, wherein the collating means of the data carrier reads out a part or all of the memory when the ID numbers are determined to match. A data processing device using a contactless data carrier characterized by permitting. 3. A data processing device using the non-contact data carrier according to claim 1, wherein the collating means of the data carrier writes a part or all of the memory when it is determined that the ID numbers match. A data processing device using a contactless data carrier characterized by permitting.