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Method for improving electron label reading efficiency based on power control

An electronic tag and reading efficiency technology, which is applied in the field of improving the reading efficiency of electronic tags based on power control, can solve problems such as performance degradation, and achieve the effects of reducing the number, reducing the probability of conflict, and achieving a large degree of freedom.

Inactive Publication Date: 2015-05-27
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Q algorithm is an anti-collision algorithm with excellent performance based on time slot Aloha, but when the number of electronic tags is large, like other anti-collision algorithms, the performance drops rapidly

Method used

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  • Method for improving electron label reading efficiency based on power control
  • Method for improving electron label reading efficiency based on power control
  • Method for improving electron label reading efficiency based on power control

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Embodiment Construction

[0028] The invention provides a method for reducing the collision of radio frequency identification (RFID) electronic tags and improving the reading efficiency of the electronic tags by following the EPC class1 gen2 standard without any modification to the underlying structure or communication protocol of the electronic tag. The present invention realizes the grouping of the electronic tags within the action range of the reader through power control, and then identifies each group of electronic tags respectively, thereby avoiding the decline of the identification performance of the reader due to the increase in the number of electronic tags.

[0029] From the electromagnetic field and antenna theory, it can be known that the greater the transmitting power of the reader antenna, the smaller its range of action, and the smaller the distance of the electronic tag that the reader can read, and vice versa. In the application environment with dense electronic tags, by reducing the re...

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Abstract

The invention discloses a method for improving electron label reading efficiency based on power control. The method comprises the following steps: A. setting an initial value of transmitting power of a reader antenna; B. determining whether the current transmitting power of the reader antenna is greater than the maximum of the transmitting power of the reader antenna, if yes, stopping the recognition process, and if no, carrying out a step C; C. reading the electron label by the reader; D. determining whether there is an unread electron label in an action range of the reader, if yes, carrying out the step C, and if no, carrying out a step E; and E. improving the transmitting power of the reader antenna and returning to the step B. The method in the invention reduces the quantity of the electron labels to be identified in the same identification frame by grouping the electron labels, thereby improving the reading efficiency of the electron label. Compared with other anti-collision algorithms that change algorithm designs, reader and the electron label communication protocols or hardware structures, the method provided in the invention is easier to realize. Furthermore, setting can be changed according to a practical situation in the method, so that the method has a great degree of freedom.

Description

technical field [0001] The invention relates to data reading of radio frequency identification (RFID) electronic tags, in particular to a method for improving the reading efficiency of electronic tags based on power control. Background technique [0002] In the RFID system, the reader and the electronic tag transmit data through a shared wireless channel, so when two or more electronic tags respond to the reader's request at the same time, the information sent by the electronic tag will not be read due to mutual interference. Reader recognition, which is what we call a collision phenomenon. The conflict of electronic tags increases the time for the reader to identify the electronic tags, which seriously affects the performance of the RFID system. [0003] At present, many scholars at home and abroad have proposed many excellent electronic tag anti-collision algorithms in the field of RFID tag anti-collision research. Hardware support, so it is difficult to apply in RFID ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00
Inventor 温加兴陈荣军谭洪舟
Owner SUN YAT SEN UNIV
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