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Information transmission methods and devices for radio frequency identification reader and tag

A radio frequency identification and reader technology, which is applied in the direction of recording carriers used by machines, instruments, and induction recording carriers, etc., can solve the problems of inability to adjust information transmission related parameters in time, inflexible solutions, poor versatility, etc., to reduce overhead and improve Reliability, effects of improving stability and efficiency

Active Publication Date: 2012-01-25
中国电子技术标准化研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an information transmission method and device for radio frequency identification readers and tags to solve the problem that the solutions in the prior art are not flexible enough, have poor versatility, and cannot be adjusted in time with changes in wireless channels and environments Issues related to information transmission parameters, and improve transmission reliability, spectrum utilization and anti-interference performance

Method used

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  • Information transmission methods and devices for radio frequency identification reader and tag
  • Information transmission methods and devices for radio frequency identification reader and tag
  • Information transmission methods and devices for radio frequency identification reader and tag

Examples

Experimental program
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Embodiment 1

[0033] figure 1 A flowchart of an information sending method for a radio frequency identification reader according to Embodiment 1 of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0034] S101. Read preamble information of a predetermined length and send it;

[0035] The wireless transmitter of the reader reads a pre-determined one or more bytes of preamble information sequence from the memory and sends it. The preamble sequence is a known information sequence agreed to be used by both parties of the wireless transceiver, and is used to help the receiving end complete initial synchronization. The reader as the master device will automatically detect the channel quality, and decide to use one or more bytes of preamble information sequence according to the channel quality.

[0036] S102. Read and send synchronization information of a predetermined length;

[0037] The wireless transmitter reads the synchronization information se...

Embodiment 2

[0081] Corresponding to Embodiment 1, this embodiment of the present invention provides an information receiving method for a radio frequency identification tag, figure 2 It is a flowchart of an information receiving method for a radio frequency identification tag according to Embodiment 2 of the present invention. Such as figure 2 As shown, the method includes the following steps:

[0082] S201. Receive and store preamble information of a predetermined length, and complete initial synchronization according to the preamble information;

[0083] The tag compares the first received information sequence of predetermined length with the locally stored information sequence of equal length. At the same time, the timing of the same local sequence is adjusted according to the timing position of the received sequence, so that the clocks of both parties are synchronized.

[0084] S202. Receive synchronization information of a predetermined length, and complete synchronization accor...

Embodiment 3

[0105] Embodiment 3 of the present invention provides an information sending method for a radio frequency identification tag. image 3 It is a flow chart of an information sending method for a radio frequency identification tag according to Embodiment 3 of the present invention. Such as image 3 shown, including the following steps:

[0106] S301. Read and send preamble information with a predetermined length;

[0107] S302. Read and send synchronization information of a predetermined length;

[0108] S303. Read and send the data length information of a predetermined length;

[0109] S304. Read and send frame option information, where the frame option information indicates the modulation mode, information rate, frame direction and frame type of information transmission;

[0110] S305. Determine whether an access command has been received;

[0111] S306. When the access command has been received, directly read and send the response data;

[0112] S307. Generate a verifica...

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PUM

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Abstract

The invention provides information transmission methods and devices for a radio frequency identification reader and tag. The information transmission method for the radio frequency identification reader comprises the following steps of: reading and transmitting preamble information with a preset length; reading and transmitting synchronous information with a preset length; reading and transmitting data length information with a preset length, wherein the data length information is used for representing the payload length of current transmission; reading and transmitting frame option information, wherein the frame option information is used for representing a modulation way, an information rate, a frame direction and frame type information; reading and transmitting message data information; performing error checking on the transmitted frame option information and message data information to generate checking results; and reading and transmitting the checking results. By utilizing the methods, an information transmission establishment process can be regulated and controlled for different channel environments so as to improve the information transmission reliability and the anti-interference performance and increase the frequency spectrum utilization rate.

Description

technical field [0001] The invention relates to a wireless communication technology, in particular to an information transmission method and device for a radio frequency identification reader and a label. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identify) is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. Radio frequency identification technology can identify high-speed moving objects and can identify multiple tags at the same time, and the operation is fast and convenient. The basic working principle of radio frequency identification technology is as follows: after the tag enters the reader's electromagnetic field coverage area, it receives the radio frequency signal sent by the reader, and sends out the product informatio...

Claims

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Application Information

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IPC IPC(8): G06K7/00G06K19/07
Inventor 王文峰王宏刚高林王晓磊冯敬李远威金倩夏娣娜耿力曹国顺
Owner 中国电子技术标准化研究所