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RFID system and communication method performed by the same

Inactive Publication Date: 2009-08-06
INTELLECTUAL DISCOVERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The present invention provides an RFID system for maintaining a constant strength of a signal transmitted from an RFID tag to an RFID reader, regardless of a distance between the RFID reader and the RFID tag.

Problems solved by technology

Also, since a passive type RFID reader aims at a long-distance recognition, receiving a signal that exceeds a certain level, e.g., from a nearby RFID tag, may cause a problem with a recognition rate of an RFID tag signal.

Method used

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  • RFID system and communication method performed by the same
  • RFID system and communication method performed by the same
  • RFID system and communication method performed by the same

Examples

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Embodiment Construction

[0028]Hereinafter, the present invention will be described in detail by explaining exemplary embodiments of the invention with reference to the attached drawings. Like reference numerals in the drawings denote like elements.

[0029]FIG. 1 is a block diagram of an RFID system 100 according to an embodiment of the present invention.

[0030]Referring to FIG. 1, the RFID system 100 includes an RFID reader 105 and an RFID tag 101. The RFID reader 105 and the RFID tag 101 communicate with each other wirelessly.

[0031]The RFID reader 105 sends a signal to the RFID tag 101 in order to extract information stored in the RFID tag 101. The RFID reader 105 measures a strength of a signal received from the RFID tag 101, and creates control information by using the measured value to include the control information in an output signal. The control information includes a value which sets an amplification amount of the signal sent from the RFID tag 101 so that strength of the signal received by the RFID r...

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Abstract

Provided is an RFID system and method for maintaining a constant strength of a signal transmitted from an RFID tag to an RFID reader, regardless of a distance between the reader and tag. The RFID signal strength measuring reader measures a signal strength received from the RFID tag, creates control information used to set an amplification amount of the RFID tag by using a value of the measured strength to include the control information in an output signal, and sends the output signal to the RFID tag. The RFID tag, if the signal sent from the RFID reader is received, extracts internal information from the received signal, sends the information to the RFID reader as an output signal, and extracts the control information included in the signal sent from the RFID reader to adjust a strength of the output signal according to a value of the control information.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2008-0010367, filed on Jan. 31, 2008, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a radio frequency identification (RFID) system that comprises an RFID reader and an RFID tag and performs mutual communication, and a communication method performed by the RFID system.[0004]2. Description of the Related Art[0005]Radio frequency identification (RFID) technology is a radio frequency recognition technology, which identifies an object by using a radio frequency ranging, that is a radio frequency band, from MHz to GHz, without contacting the object. A wide radio frequency band makes it possible to use various types of frequencies and utilize different frequencies according to particular applications.[0006]An RFID sys...

Claims

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Application Information

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IPC IPC(8): H04Q5/22
CPCH04B5/0062G08C17/02G06K7/10366G06K7/10297H04B5/77G06K17/00H04B5/48
Inventor JEON, KI-YONGYOON, CHANG-SEOKCHO
Owner INTELLECTUAL DISCOVERY CO LTD
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