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Multiple-label anti-collision method for radio frequency recognition

A radio frequency identification and multi-tag technology, applied in the field of multi-tag collision prevention of radio frequency identification, can solve the problem of wasting time slots in multi-tag inventory, and achieve the effect of saving inventory time, optimizing inventory process and reasonable process.

Active Publication Date: 2009-05-27
ZTE INTELLIGENT IOT TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a multi-tag anti-collision method for radio frequency identification, solve the waste problem of multi-tag counting time slots in the prior art, and improve the efficiency of tag counting

Method used

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  • Multiple-label anti-collision method for radio frequency recognition
  • Multiple-label anti-collision method for radio frequency recognition
  • Multiple-label anti-collision method for radio frequency recognition

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Embodiment Construction

[0030] In order to obtain higher tag access efficiency, the present invention effectively improves the Binary Tree algorithm.

[0031] The process of adopting the method of the present invention to carry out radio frequency identification multi-tag anti-collision is as follows, as figure 2 Shown:

[0032] In steps S1, S2 and S3, the reader selects the tags in the effective radio frequency field area. The reader sends an instruction to start counting the tags, and receives signals from the tags at the specified time slots.

[0033] Among them, the reader sends a selection command, and all tags perform condition matching after receiving the selection command, and the tags that meet the conditions enter the inventory process.

[0034] Step S4, after the tag receives the instruction to start counting, it initializes its own information, sets the counter to 0, and sends the tag information to the reader.

[0035] Step S5, the reader receives the tag reply information, which is ...

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Abstract

The invention discloses a method for anti-collision of multi-tags of radio frequency identification, which comprises the following steps: (a) a reader counts tags; (b) after receiving a command for beginning to count, the counter is set to be 0 and the tag replies to the reader; and (c) if correctly receiving the reply information of the tags, the reader sends a success confirmation instruction, the tags which correctly reply information exit from the counting process, and the counter value of the tags which do not correctly reply information subtracts 1; if the reader incorrectly receives the reply information of the tags, the reader sends a failure confirmation instruction, and the counter value of the tags, which is not 0, adds 1, and the tags with the counter value of 0 are divided; if the reader does not receive the reply information of the tags and incorrectly receives the return information of the tags at the last time slot, the reader sends a re-dividing instruction to the tags, the counter value of the tags, which is not 1, is remained, and the tags with the counter value of 1 are divided; and (d) the tags with the counter value of 0 reply to the reader, and the step (c) is carried out. The method improves counting efficiency of the multi-tags.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a radio frequency identification (RFID) multi-label anti-collision method. Background technique [0002] In the application of RFID technology, usually one reader corresponds to multiple electronic tags. When multiple tags are connected to the reader at the same time, collisions will occur, so the information in the tags cannot be correctly transmitted to the reader. Therefore, certain mechanisms need to be adopted to avoid collisions or reduce collisions. [0003] In the current international standard ISO 18000-6, ALOHA algorithm and Binary Tree algorithm are used to solve the collision. [0004] The basic feature of ALOHA is that the system divides the channel where the tags reply by time into several intervals (the intervals are called time slots), and requires the tags to choose one of the replies. In operation, the reader gives each tag a transmission probability (or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
CPCG06K7/10049G06K7/0008G06K7/10029
Inventor 周欢焦红爱张建
Owner ZTE INTELLIGENT IOT TECH
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