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Label anti-collision method and reader

A reader and anti-collision technology, which is applied in the field of tag anti-collision methods and readers, can solve the problems of affecting inventory efficiency and low splitting speed, and achieve the effects of reducing collision probability, increasing splitting speed, and splitting in advance

Active Publication Date: 2010-03-31
ZTE INTELLIGENT IOT TECH
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Problems solved by technology

[0008] In view of the low splitting speed of the current anti-collision method in the related art, which affects the efficiency of inventory, the present invention is proposed. For this reason, the main purpose of the present invention is to provide a tag anti-collision method and a reader to solve the above problems

Method used

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  • Label anti-collision method and reader
  • Label anti-collision method and reader
  • Label anti-collision method and reader

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Embodiment Construction

[0022] Functional Overview

[0023] In order to obtain higher label inventory efficiency, the present invention effectively improves the Binary Tree algorithm, and proposes a pre-split multi-tree label anti-collision scheme in the radio frequency identification system. The basic idea of ​​the scheme is: the reader is reading During the process of tagging, the tag selects the time slot to reply and a collision occurs, and the reader sends a collision command. After the tag receives the collision command, it does not divide the 0 branch into two, but dynamically implements multi-fork splitting to avoid multiple collisions and splits of the 0 branch. The process wastes time. The reader sends a successful instruction to the reader, and when the tag receives the successful instruction, it implements multi-fork splitting in advance according to the instruction, so that each branch reduces a collision.

[0024] Taking branch 0 to describe the leftmost sub-branch and branch 1 to desc...

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Abstract

The invention discloses a label anti-collision method and a reader. The label anti-collision method comprises the following steps: 1, the reader reads all labels and sends a collision order used for indicating all the labels to be divided into n branches; 2, the branch with a minimal value of a counter is taken as a current branch; 3, the reader reads the current branch, a step 4 is carried out under the condition that the labels inside the current branch are replied and collided, and otherwise, the step 2 is carried out again when the current branch is successfully replied, the labels of thenext branch of the current branch are divided into m sub-branches, counters of the labels inside the next branch and the sequential branches are all added with (m-2); 4, the reader sends a collision order used for indicating that the labels of the current branch are divided into p sub-branches, and each label inside the current branch respectively updates the value of the counter; 5, the sub-branch with the minimal value of the counter is taken as the current branch, and the step 3 is carried out again. By adopting the invention, forward separation is realized, and the counting efficiency is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a tag anti-collision method and a reader. Background technique [0002] In the practical application of RFID, under normal circumstances, one reader in the radio frequency field corresponds to multiple electronic tags. When the reader counts multiple electronic tags at the same time, channel contention will occur, resulting in collisions. The tag cannot send the information to the reader correctly, so a certain mechanism needs to be adopted to avoid or reduce the occurrence of collisions. [0003] At present, in the RFID international standard ISO 18000-6, Class A and Class C use the time slot ALOHA algorithm to solve the above collision problem, while Class B uses the BinaryTree algorithm to solve the above collision problem. Among them, the time slot ALOHA and Binary Trees are all based on time division multiple access methods. The following is a brief introduction to the slotted ALO...

Claims

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Application Information

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IPC IPC(8): G06K7/00
Inventor 焦红爱王立刘朝阳
Owner ZTE INTELLIGENT IOT TECH
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