Method and system for identifying lost tag of RFID system

A label and category technology, applied in the field of radio frequency identification, can solve the problems of lost labels, energy waste, and low time efficiency, and achieve the effect of improving utilization and reducing energy consumption

Active Publication Date: 2014-04-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, these research methods identify the missing tags for all tags in the monitoring range of the RFID system without distinguishing the tag categories, which will lead to inefficient time and waste of energy.

Method used

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  • Method and system for identifying lost tag of RFID system
  • Method and system for identifying lost tag of RFID system
  • Method and system for identifying lost tag of RFID system

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] see figure 1 , the embodiment of the present invention provides a kind of method of identification RFID system lost label, and this method comprises the following steps:

[0032] Step 101: The backend server uses a hash function to construct a Bloom filter bit vector according to the tags of a given category, and transmits the Bloom filter bit vector to the reader, and the reader sends it to all tags within the monitoring range ;

[0033] Step 102: Ea...

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Abstract

The invention provides a method for identifying a lost tag of an RFID system. The method for identifying the lost tag of the RFID system comprises the steps that a Bloom filter is used, the property whether an element exists in a set or not can be searched for, and tags in a set of an expected classification are activated to participate in the follow-up identification process; an empty time slot and a conflict time slot are made full use of on the basis of an ALOHA protocol, and identification of the lost tag in the classified RFID system is finally accomplished. According to the method for identifying the lost tag of the RFID system, the process of identifying the lost tag can be carried out by screening out the tags of the expected classification, the utilization rate of frames in the identification process is improved, and identification efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a method and system for identifying lost tags in an RFID system. Background technique [0002] As an emerging technology, Radio Frequency Identification (RFID) has been widely used in various applications such as warehouse management, logistics management and object tracking. Compared with existing bar code technology, RFID tags can be read wirelessly within a few feet (passive RFID tags) or even hundreds of feet (active RFID tags). At the same time, an RFID tag has storage and computing power, and it can automatically read data, avoiding the trouble of manual scanning. These new features of RFID make it superior to bar code technology, expanding the operating range and improving reading accuracy in a variety of applications. The current RFID system has two main characteristics. [0003] First, most of the existing RFID systems are subcategories. Becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 龚伟刘云浩
Owner TSINGHUA UNIV
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