Anti-collision method and device of RFID system, computer readable storage medium and device

An anti-collision and labeling technology, applied in the field of radio frequency identification, can solve the problems of ALOHA algorithm identification efficiency decline, low throughput rate, and reduce the amount of one-time identification of the system

Active Publication Date: 2019-03-08
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the Framed Slotted ALOHA (Framed Slotted ALOHA, FSA) algorithm has the following disadvantages: when the number of tags is much larger than the number of slots in the data frame, the possibility of tag collision increases; when the number of tags is much smaller than the number of slots in the data frame time slot waste
[0008] However, the length of the data frame that the reader can provide is limited (the maximum is N max =256), when the number of tags within the reading range of the reader is much greater th

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  • Anti-collision method and device of RFID system, computer readable storage medium and device
  • Anti-collision method and device of RFID system, computer readable storage medium and device
  • Anti-collision method and device of RFID system, computer readable storage medium and device

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Embodiment 1

[0067] An embodiment of the present invention provides an anti-collision method for an RFID system. The RFID system mainly includes a tag to be identified, a reader, and a background management system. The tag to be identified is equipped with a random number generator T and a random number storage S, which is installed on the material or employee card; the reader is installed on the workstation, and transmits the data it reads to the controller through zigbee wireless technology , and receive the commands issued by the computer from the controller; the management system includes the controller and the computer, the controller and the reader communicate through the zigbee wireless network, and connect with the computer through RS232.

[0068] Such as figure 1 As shown, the method of the embodiment of the present invention includes:

[0069] Step S100: Estimate the number n of tags to be identified, group the tags to be identified according to the number n of tags to be identi...

Embodiment 2

[0102] The embodiment of the present invention provides a kind of anti-collision device of RFID system, such as Figure 4 As shown, the device includes:

[0103] The grouping module 10 is used to estimate the number n of tags to be identified, group the tags to be identified according to the number n of tags to be identified, and determine the length of the data frame corresponding to each group of tags to be identified according to the number of tags to be identified in each group.

[0104] The current group initialization module 20 is used to select a group of unrecognized tags to be identified as the current group, and determine the initial value of the time slot parameter Q and the number of frame time slots M according to the number of tags to be identified in the current group, wherein Q's The value of the initial value should satisfy the data frame length 2 Q It is closest to the number of tags to be identified in the current group, and the initial value of M is 2 Q ....

Embodiment 3

[0127] The method or device described in the above-mentioned embodiments provided in this specification can implement business logic through a computer program and record it on a storage medium, and the storage medium can be read and executed by a computer to achieve the effect of the solution described in Embodiment 1 of this specification . Therefore, the present invention also provides an anti-collision computer-readable storage medium for an RFID system, including a processor and a memory for storing processor-executable instructions. When the instructions are executed by the processor, the RFID system of Embodiment 1 is implemented. The steps of the anti-collision method.

[0128] The method adopted in the embodiment of the present invention continues the advantages of the dynamic frame time slot ALOHA algorithm, which is highly versatile and easy to implement, and at the same time solves the problem that some tags in the dynamic frame time slot algorithm cannot always be...

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Abstract

The invention discloses an anti-collision method and device of an RFID system, a computer readable storage medium and a device, and belongs to the technical field of radio frequency identification. The method comprises the steps of S100 estimating the number of labels, and grouping the labels; S200 determining the time slot parameters according to the number of labels of the current group; S300 sending a command with time slot parameters to the tag, and after the tag receives the command, generating a random number to serve as a time slot value; S400 simultaneously receiving the response signal of the tag when three time slots are opened each time, and marking the time slots as idle time slots, successful time slots or collision time slots according to the condition of the response signal;S500 adjusting time slot parameters according to the number of idle time slots, the number of successful time slots and the number of collision time slots; if the successful time slot is 0, returningto the step S200; otherwise, returning to the step S300; The method is high in universality, is simple and easy to realize, solves the label starvation problem, reduces the possibility of label collision, improves the identification efficiency of the system, and optimizes the system performance.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to an anti-collision method, device, computer-readable storage medium and equipment of an RFID system. Background technique [0002] RFID refers to radio frequency identification technology (Radio Frequency IDentification), which identifies the information in the electronic tag through spatial coupling, and feeds back the acquired information to the reader to realize the data exchange between the reader and the electronic tag. This technology has the advantages of high safety, anti-pollution, fast recognition speed, large data capacity, fast and convenient reading, and dynamic change of label data. It has been widely used in logistics transportation, personnel management, automated production and other fields. [0003] During the identification process of the RFID system, it is often the case that multiple tags send information to the reader at the same time. ...

Claims

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Application Information

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IPC IPC(8): G06K7/10
CPCG06K7/10029
Inventor 李艳萍高焕兵隋守刚王琪朱青
Owner SHANDONG JIANZHU UNIV
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