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Loss label identification method of RF identification system with unknown label

A technology of radio frequency identification system and label identification, which is applied in the direction of electromagnetic radiation induction, instruments, induction record carriers, etc., can solve the problems of low identification accuracy and inability to effectively suppress interference from unknown labels, so as to improve identification efficiency, shorten identification time, The effect of reducing the impact

Inactive Publication Date: 2017-09-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies existing in the prior art, such as inability to effectively suppress unknown tag interference and low recognition accuracy, the present invention provides a lost tag identification method for a radio frequency identification system containing unknown tags, which can effectively suppress unknown tags and convert unknown tags The impact is reduced to the allowable range of the radio frequency identification system, and the utilization rate of time slots is effectively improved, and the identification efficiency of lost tags is improved

Method used

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  • Loss label identification method of RF identification system with unknown label
  • Loss label identification method of RF identification system with unknown label
  • Loss label identification method of RF identification system with unknown label

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Embodiment

[0078] see figure 1 , the existing tags in the RFID system are t1, t2, t3, t4, t5 and t6, the missing tags are t7, t8, t9 and t10, and the unknown tags are t11, t12, t13 and t14.

[0079] continue to see figure 1 , carry out the first round of unknown tag suppression on the above-mentioned radio frequency identification system, in the first round of unknown tag suppression process, the reading head sets the frame length f=N, N=10, generates a random number seed, and broadcasts the frame length and the random number seed . Each tag calculates the tag response time slot number after receiving the information broadcast by the above-mentioned reading head. The read head predicts the state of each slot and saves it in the f-bit vector EV 1 in, such as figure 1 The desired frame in . The reading head executes the frame, and each tag sends a 1-bit response information in the tag response time slot, and the reading head detects the actual state of each time slot, which is stored ...

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Abstract

The invention relates to a loss label identification method of an RF identification system with an unknown label. The identification method comprises two processes of unknown label suppression and lost label identification. In a known label suppression process, if a fact that a certain label is the known label is determined, the label enters a dormancy state and does not participate in a subsequent unknown label suppressing process and a lost label identification process. Through suppressing the known label, the identification method can effectively suppress the unknown label in an RF identification system, thereby reducing influence of the known label to the lost label identification process and improving identification precision. In the lost label identification process, each frame is divided into a plurality of subframes, and only a single time slot is reserved, thereby greatly shortening identification time.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification and the Internet of Things, and relates to a radio frequency identification system, in particular to a lost label identification method of a radio frequency identification system containing an unknown label. Background technique [0002] Radio Frequency Identification (English: Radio Frequency Identification, referred to as: RFID) system usually consists of a background server, one or more reading heads (English: Reader) and a large number of tags (English: Tag), the reading head can communicate with the radio frequency through the wireless channel Simple communication with tags within transmission range. The background server pre-stores the ID of each tag, and can exchange information with the reading head through wired or wireless methods. The most direct way to identify lost tags is that the reader broadcasts the ID of each tag one by one, and the tag immediately returns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00G06K7/10
CPCG06K7/0008G06K7/10069
Inventor 陈鸿龙林凯刘璐付金楠丁鑫旺石乐义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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