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Radio communication apparatus and radio communication method

A wireless communication device and wireless communication technology, which are applied in the directions of cooperating devices, instruments, inductive record carriers, etc., can solve the problems of inability to eliminate the influence of noise, erroneous communication by bit conversion, and recurrence of errors.

Inactive Publication Date: 2008-10-22
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in many cases, when other wireless communication devices use a frequency close to that of a channel used for medium communication, errors such as bit omission errors or bit conversion errors occur due to the influence of generated noise. communication error
In this case, since the influence of noise cannot be removed even by retrying wireless communication using the same frequency, there is a high possibility that the error will occur again

Method used

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  • Radio communication apparatus and radio communication method
  • Radio communication apparatus and radio communication method
  • Radio communication apparatus and radio communication method

Examples

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Embodiment Construction

[0020] [1] Hereinafter, a first embodiment of the present invention will be described.

[0021] The first embodiment shows a case where the present invention is applied to an RFID reader / writer configured to use the UHF band of 952 to 954 MHz (1 to 9 radio channels ), read data stored in a memory of the RFID and write data to the memory by performing wireless communication with the RFID as a wireless communication medium.

[0022] figure 1 A schematic diagram of an RFID system using an RFID reader / writer is shown. The system consists of multiple RFID readers / writers ( figure 1 Only three RFID readers / writers 1-1, 1-2, 1-3 are shown), the host 2 as a high-level device for controlling the RFID reader / writer 1 and the read / write by each reader / writer 1 Multiple RFID 3( figure 1 Only 6 RFID 3-1, 3-2, 3-3, 3-4, 3-5, 3-6) components are shown.

[0023] Each RFID 3 has an antenna and an IC chip. The IC chip is provided with a power generator, a demodulator, a modulator, a stora...

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Abstract

Random radio channel is selected from multiple radio channels as a channel for medium communication and data communication is performed by using the channel for medium communication and at least one RFID (3). Particularly, the data communication with the RFID is determined whether to be ended normally, and the channel for medium communication is switched to another radio channel of multiple radio channels if the data communication is not ended normally.

Description

technical field [0001] The present invention relates to a wireless communication device such as a radio frequency identification (RFID) reader / writer configured to read, for example, in a non-contact manner by using electromagnetic waves in a UHF band, and a wireless communication method thereof. RFID data and write RFID data. Background technique [0002] In recent years, a wireless communication system called an RFID system has drawn attention. Such a system consists of small wireless communication media each having an IC chip and an antenna, and an RFID reader / writer that wirelessly communicates with the wireless communication media using electric fields or electromagnetic waves to write and read data in a non-contact manner. [0003] A unique ID such as a serial number set during manufacturing is stored in the IC chip of the RFID reader / writer. Wireless communication media can be thinned and easily attached to objects. Therefore, the wireless communication medium is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00G06K17/00H04B5/48
CPCG06K7/0008G06K7/10356
Inventor 铃木茂晃
Owner TOSHIBA TEC KK