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Label anti-collision method for radio frequency recognition system

一种射频识别系统、标签的技术，应用在标签防碰撞领域，能够解决分支浪费等问题

Active Publication Date: 2009-05-13
ZTE INTELLIGENT IOT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, after the 0 branch inventory is completed, the subsequent branch will waste a lot of time performing a split process similar to the 0 branch

Method used

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  • Label anti-collision method for radio frequency recognition system
  • Label anti-collision method for radio frequency recognition system
  • Label anti-collision method for radio frequency recognition system

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Embodiment Construction

[0029] In order to obtain higher label counting efficiency, the present invention effectively improves the Binary Tree algorithm, and proposes a parallel splitting binary tree label anti-collision method. The details are as follows: the reader starts to count the tags and waits for the tags to reply; all the tags start to reply, if the tag replies successfully, the tags are counted, if the tag replies collide, the tags are divided into two subsets, which are called left branch tags and right branch tags , the left branch tag replies to the reader, and the right branch tag must wait for the left branch tag to be counted before replying; if the tag reply is successful, the left branch tag is counted and the right branch tag starts to be counted. If the tag reply collides, the left branch tag Re-split to get a new left branch label and a new right branch label, the new left branch label replies to the reader, and the new right branch label must wait for the new left branch label t...

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PUM

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Abstract

The invention provides a tag anti-collision method of a radio frequency identification system. A reader begins to count tags, and waits replies from the tags; all the tags begin to reply; if the tags reply success, counting of the tag is finished, if the tags reply collision, the tags are split into two subsets, namely, left branch tags and right branch tags, the left branch tags reply the reader, the right branch tags reply only after the left branch tags are counted; if the left branch tags reply success, the counting of left branch tags is finished, the right branch tags are counted, if the tags reply collision, the left branch tags are re-split to obtain new left branch tags and new right branch tags, the new left branch tags reply the reader, and the new right branch tags reply only after the new left branch tags are counted; the steps are repeated till all the tags are counted. The method is characterized in that a plurality of branch tags are obtained in at least one splitting during the tag splitting process.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a tag anti-collision method in the field of radio frequency identification (RFID). Background technique [0002] In the actual application of RFID, in many cases, one reader corresponds to multiple electronic tags in the radio frequency field. When the reader counts multiple electronic tags at the same time, there will be channel contention and collision, and the electronic tags cannot send the information to the reader correctly. Therefore, certain mechanisms need to be adopted to avoid collisions or reduce collisions. [0003] In the existing RFID international standard ISO 18000-6, Type A and Type C use the slotted ALOHA algorithm, while Type B uses the Binary Tree (binary tree) algorithm to solve the collision problem. Both slotted ALOHA and Binary Tree are based on time division multiple access. [0004] The slotted ALOHA algorithm divides time into several discrete ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
CPCG06K7/10019G06K7/0008
Inventor 焦红爱张建杜江
Owner ZTE INTELLIGENT IOT TECH
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