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Radio-frequency identification label anti-collision method based on secant iteration

A radio frequency identification tag and identification tag technology, which is applied in the field of anti-collision radio frequency identification tags based on chord iteration iteration, and can solve problems such as the inability to guarantee global throughput performance.

Active Publication Date: 2017-04-26
XIJING UNIV
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Problems solved by technology

The highest single frame recognition efficiency does not guarantee the highest global throughput performance

Method used

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  • Radio-frequency identification label anti-collision method based on secant iteration
  • Radio-frequency identification label anti-collision method based on secant iteration
  • Radio-frequency identification label anti-collision method based on secant iteration

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specific Embodiment approach

[0099] Such as image 3 , Figure 4 And attached Figure 5 Shown, a kind of radio frequency identification tag anti-collision method based on chord iteration iteration, its specific embodiment is:

[0100] attached image 3 Given n=900, Q=1200 label estimation chord iteration example. The experimental parameters are: estimated x l , when ε=0.001.x 0 =0.3Q=360,x 1 = 0.6Q = 720, estimate x u time x 0 =1.3Q=1560and x 1 =1.6Q=1920.

[0101] attached image 3 display, solve for x l and x u The number of iterations is 5 times. Using the experimental results in Table 1, the reader sends two tentative commands QueryT(495) and QueryT(1200) with Q=923-428=495 and 1620-420=1200 as parameters respectively. N sl =189,189 / 495=0.3816,N su = 315, 315 / 1200 = 0.2624, so The estimated error is |923-900| / 900=2.5%, and such an estimated accuracy can better meet the requirements for adjusting the recognition frame length. If the theoretical value E[P(Q,n,1)]=425.4 of the number o...

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Abstract

A radio-frequency identification label anti-collision method based on secant iteration is provided; the radio-frequency identification label anti-collision method comprises the following steps: using a secant iteration method to estimate a residual label number; adaptively and dynamically adjusting a subsequent frame length according to the principle that a to-be-identified label number is equal to the frame length, thus realizing the optimal identification efficiency. The secant iteration method can estimate the pseudo solution formed by the residual label number; two probe frames are broadcasted, and probe identification rates are recorded so as to determine the pseudo solution, thus eliminating same. The embodiment shows that the residual label number estimate precision by the method can be above 97%, thus satisfying label anti-collision estimate precision requirements. The global throughput performance of the radio-frequency identification label anti-collision method is greatly than a conventional international standard Q algorithm, thus reaching an ideal system.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, and in particular relates to an anti-collision method for radio frequency identification tags based on chord iteration. Background technique [0002] Radio frequency identification technology (RFID) has been more and more widely used in food traceability, blood management and other fields. The radio frequency identification system consists of a reader, an electronic tag (referred to as a tag) and a back-end processing system. The tag is usually attached to the object to be identified, and the back-end processing system realizes data exchange through the wireless channel between the reader and the tag, and then realizes the identification, positioning and intelligent control of the attached object. [0003] In practical applications, due to the large scale of objects to be identified, it is required to quickly identify many tags in batches. Due to cost constraints, tags ge...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
CPCG06K7/10019
Inventor 王祖良
Owner XIJING UNIV
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