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Binary splitting method based on free timeslot elimination

A technology of binary splitting and idle time slot, which is applied in the anti-collision of UHF RFID multi-tag, and the binary splitting field based on the elimination of idle time slot can solve the problems of long coordination transmission time, low identification efficiency and high identification delay. The effect of reducing the number of transmissions and coordination time, less hardware resources, and reducing system complexity

Active Publication Date: 2015-12-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, such as low identification efficiency, long coordination transmission time, high identification delay, and high complexity.

Method used

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  • Binary splitting method based on free timeslot elimination
  • Binary splitting method based on free timeslot elimination
  • Binary splitting method based on free timeslot elimination

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Embodiment Construction

[0025] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments. Such as figure 1 Shown is a binary splitting method based on idle time slot elimination of the present invention, which specifically includes the following steps:

[0026] S1: The reader initializes the identification process. In the initialization phase, the tag counter T c , the random number generator Q, and the identification bits F are both 0, where both Q and F are binary numbers 0 or 1.

[0027] S2: The reader sends a query command, all unrecognized tags within the working range of the reader (unrecognized tags T c ≥0, hereafter use T c ≥0 means unrecognized tag) Received the query command from the reader.

[0028] S3: If the label counter value T c =0, then return data to the reader-writer; the returned data is specifically: when the tag’s identification bit F=0, then the tag returns a 1-bit Q signal to the reader-writer, and Q is a...

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Abstract

The invention discloses a binary splitting method based on free timeslot elimination. A bit identification position is introduced into a binary splitting algorithm, in the identification process, pre-grouping is conducted on tags by means of the identification position, and then splitting recognition is conducted on each group of the tags by means of a binary random number splitting thought. The method particularly comprises the steps that the tag with a timer showing zero is in an active state, when the identification position F is zero, a one-bit Q signal is sent to a reader-writer, and when the identification position F is one, ID data are sent to the reader-writer; the reader-writer gives response and feedback to different feedback signals according to received tags to make the tags execute corresponding operations. Compared with a traditional binary splitting algorithm, by means of the binary splitting method based on free timeslot elimination, free timeslots produced in the recognition process are thoroughly eliminated, therefore, the time coordination cost in the recognition process can be saved, and the recognition efficiency is improved; in addition, partial collision arbitration is completed by being assisted through the Q signal, the information transmission quantity is effectively reduced, and the system energy consumption is reduced.

Description

technical field [0001] The invention belongs to the ultra-high frequency (UHF) radio frequency identification (RFID) multi-label anti-collision technology in the field of wireless communication, and in particular relates to a binary splitting method based on idle time slot elimination. Background technique [0002] Rapid identification is an urgent need for modern radio frequency identification (radiofrequency identification, RFID) systems, especially in the fields of logistics management, supply chain management, food production, bioelectronics and pharmaceuticals, and industrial automation. In most industrial applications, passive ultra-high frequency (UHF) RFID is more popular due to its advantages such as long communication distance, fast recognition speed, large storage capacity, and low cost. A typical application of RFID systems is to attach a large number of On high density products, then identify them quickly and efficiently. In order to realize the tracking and id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00
Inventor 苏健文光俊李建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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