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Rf-tag reading system and rf-tag reader/writer control system, and interference avoidance method therefor

A technology of radio frequency tags and control systems, applied in the field of avoiding interference between query signals, can solve the problems of not being able to read RF tags, query signal interference, etc., and achieve the effect of reducing costs and recreating scheduling easily

Inactive Publication Date: 2006-08-16
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if there are multiple RF tag readers / writers and their respective antennas are close to each other, when multiple RF tag readers / writers simultaneously realize wireless communication , the inquiry signals respectively from these RF tag readers / writers may interfere with each other, thus the information of the RF tags may not be read

Method used

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  • Rf-tag reading system and rf-tag reader/writer control system, and interference avoidance method therefor
  • Rf-tag reading system and rf-tag reader/writer control system, and interference avoidance method therefor
  • Rf-tag reading system and rf-tag reader/writer control system, and interference avoidance method therefor

Examples

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Embodiment Construction

[0027] Embodiments of the present invention will be explained below with reference to the drawings. figure 1 is a block diagram illustrating the configuration of an RF (Radio Frequency) tag reading system according to a first embodiment of the present invention. exist figure 1 Among them, the RF tag reading system according to the first embodiment of the present invention includes RF tags 2a and 2b as reading references, antennas 3a and 3b for wireless communication with the RF tags 2a and 2b, antennas 3a for controlling RF tag readers / writers 4a and 4b for signals of and 3b, and a control system 1 for controlling the RF tag readers / writers 4a and 4b.

[0028] The RF tag readers / writers 4a and 4b control the antennas 3a and 3b to read IDs (identifiers: identification information) of the RF tags 2a and 2b and start or stop outputting RF signals.

[0029] The control system 1 includes a schedule creation unit 11 , a schedule control unit 12 , a schedule table 13 , and a commun...

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PUM

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Abstract

An RF-tag reading system is provided, in which a reading schedule for reading RF-tags, without interference among RF-tag readers / writers, can automatically be created. A schedule table is a table that stores the identifiers of RF-tag readers / writers to which schedule control should be applied; fields for storing the IDs of reference RF-tags are incorporated in the schedule table and utilized during creation of the schedule table. A schedule creation unit controls the RF-tag readers / writers to detect interference and then writes a reading schedule in the schedule table. A schedule control unit reads RF-tag information from the RF-tag readers / writers, while controlling timing in accordance with the contents of the schedule table.

Description

technical field [0001] The present invention relates to a radio frequency (RF) tag reading system, a radio frequency tag reader / writer control system, an RF tag reader / writer interference avoidance method used in the system, and an embodiment of the method This procedure, and more specifically, relates to avoiding interference between inquiry signals when a plurality of radio frequency tag readers / writers (readers) simultaneously perform wireless communication. Background technique [0002] When realizing wireless communication using an RF tag, the RF tag reader / writer can read out the ID (identifier: identification information) that the RF tag has. In this case, the RF tag reader / writer sends an inquiry signal to the RF tag, the RF tag receives the inquiry signal, and then generates a response signal. The RF tag reader / writer receives a response signal from the RF tag, and recognizes information of the RF tag. [0003] However, if there are multiple RF tag readers / writers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00H04B5/48
CPCG06K7/0008G06K7/10356
Inventor 木下聪
Owner NEC CORP