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RFID tag

A technology of RFID tags and tags, applied in the field of RFID tags, can solve the problems of reducing the convenience of using RFID and not being able to access data from a long distance

Inactive Publication Date: 2007-09-26
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the technology does not enable remote access to data that does not need to be protected
This reduces the convenience of using RFID

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] Fig. 1 shows a schematic configuration of an RFID tag according to a first embodiment of the present invention. As shown in FIG. 1 , an RFID tag 101 according to the first embodiment includes: a first antenna unit 1 for transmitting / receiving radio waves to / from an RFID reader / writer 200; radio wave; the first energy supply unit 2 is used to extract energy from the radio wave received by the first antenna unit 1; the data receiving unit 3 is used to carry out the command contained in the radio wave received by the first antenna unit 1 decode, and send the generated data to the control unit 5; the data sending unit 4 is used to encode the return data sent by the control unit 5 with the transmitted radio wave from the first antenna unit 1; the control unit 5 is used to Interprets commands contained in radio waves received by the first antenna unit 1 and accesses the storage unit 6 for storing ID, user data, etc.; and the external energy input unit 12 for inputting externa...

no. 2 example

[0060] The RFID tag 101 shown in FIG. 1 is configured such that the first antenna unit 1 and the second antenna unit 7 use the same communication frequency band. However, the frequency band of the first antenna unit 1 may be different from that of the second antenna unit 7 , and the RFID tag 101 may include another radio wave source for the second antenna unit 7 .

[0061] For example, as shown in FIG. 6 , the frequency band of the first antenna unit 1 is made different from that of the second antenna unit 7 , and a radio wave source 300 is provided for the second antenna unit 7 independently of the RFID reader / writer 200 .

[0062] According to the RFID tag 101', the second antenna unit 7 receives radio waves from the radio wave source 300 when the radio wave source 300 is located within the communicable distance L2 of the second antenna unit 7. Since the energy of the received radio waves is sufficiently high for the reception sensitivity of the second antenna unit 7, the se...

no. 3 example

[0065] In the first embodiment, all data stored in the storage unit 6 are protected from malicious access. However, it is conceivable that, depending on the type of data, some data does not require protection. Therefore, the third embodiment switches the storage unit for storage based on the data type, and sets only the data that needs to be protected as the target to avoid unauthorized access, thereby further improving the convenience of using data.

[0066] Fig. 8 shows a schematic configuration of an RFID tag according to a third embodiment of the present invention. The RFID tag 102 of the third embodiment has a configuration in which the storage unit 6 is divided into a protected storage unit 6A and an unprotected storage unit 6B. The protected storage unit 6A stores data that needs to be protected. The unprotected storage unit 6B stores data that does not require protection. The control unit 5 comprises two functional units, namely: an access prohibition unit 5C, which...

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PUM

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Abstract

An RFID tag includes an external power input unit, first antenna unit, first power supply unit, memory unit, and control unit. The external power input unit inputs external power. The first antenna unit receives power from a communication device. The first power supply unit extracts power from the radio wave received by the first antenna unit. The control unit operates upon receiving power from the first power supply unit and controls permission and inhibition of access from the communication device to the memory unit in accordance with presence / absence of input of power from the external power input unit.

Description

technical field [0001] The present invention relates to an RFID (Radio Frequency Identification) tag for data communication with a communication device such as a reader or reader / writer by radio waves. Background technique [0002] In recent years, RFID has rapidly become popular as an automatic identification technology using radio communication. A common RFID system includes an RFID tag attached to an item to identify the item, and a reader / writer for reading data stored in the RFID tag's memory or writing data into the RFID tag's memory (RFID Reader / Writer). [0003] One of the features of RFID technology is the contactless access to tag memory. This feature makes it possible to read data from or write data to the tag memory without opening the package, even when multiple items each attached with an RFIF tag are packed in a box. This technology can improve the efficiency of various business processes such as item receiving and shipping, so it is expected to be applied ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/073G06K19/077H04B5/48
CPCG06K19/07336
Inventor 多贺户裕树
Owner NEC CORP
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