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Communication method of label and reader-writer in radio frequency identification system

A technology of a radio frequency identification system and a communication method, which is applied in the field of communication between a reader and a tag in a radio frequency identification system, can solve the problems of not fully considering the security mechanism, insufficient information consideration, and the corresponding relationship between the tag states is not clear enough, and achieves state transition. The effect of flexibility, clear correspondence, and perfect communication mechanism

Active Publication Date: 2012-09-19
TIANJIN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EPCglobal GEN2 is designed around the reading of EPC codes, and does not consider enough other types of information carried by tags
The two types of operations of the reader are simple and easy to implement, but relatively speaking, the functional mechanism is not strict enough, for example, the security mechanism is not fully considered
In addition, the corresponding relationship between the operation process of the reader and the status of the tag is not clear enough

Method used

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  • Communication method of label and reader-writer in radio frequency identification system
  • Communication method of label and reader-writer in radio frequency identification system
  • Communication method of label and reader-writer in radio frequency identification system

Examples

Experimental program
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Embodiment Construction

[0028] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] Such as image 3 As shown, the specific process of the communication method between the reader and the tag provided by the present invention includes the following steps:

[0030] In the first step, when the undestroyed tag is powered on, it enters the ready state.

[0031] Before the reader starts the inventory, it first continuously transmits the radio frequency carrier to provide energy for the tag. After the tag that has not been destroyed is powered on, it initializes its own information, and then enters the preparation state, waiting to receive commands from the reader; the tag that has been destroyed directly enters the destruction state after powering on, and does not respond to any commands from the reader.

[0032] In the second step, the reader sends a classification command, and the tags change their respect...

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PUM

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Abstract

The invention discloses a communication method of a label and a reader-writer in a radio frequency identification system. The method comprises the following steps that: the label is electrified to enter a preparation state; the reader-writer sends classification commands, and a special label is selected to participate in the counting cycle; the reader-writer sends inquiry starting commands to start the label counting; the reader-writer sends a series of commands according to an anti-collision mechanism; one-way or two-way authentication is carried out after simplification; the reader-writer sends visit commands to obtain corresponding authority; and the reader-writer carries out operations such as reading, writing, erasing, locking or destroying and the like. The communication method has the advantages that the communication mechanism between the reader-writer and the label is more perfect, so the label state transfer is more flexible, and the corresponding relationship between the operation process and the label state is more definite.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, in particular to a communication method between a reader-writer and a tag in a radio frequency identification system. Background technique [0002] The radio frequency identification system consists of at least one reader and a tag, and the reader and the tag communicate in a wireless manner. The reader can send commands to the tags and get relevant information from the tags. [0003] Tags are divided into two types: active tags and passive tags. Active tags have power inside and can actively communicate with the reader; passive tags have no power inside and obtain energy from the electromagnetic waves sent by the reader. In the way of scattering, the relevant information is sent to the reader to complete the communication from the tag to the reader. The UHF RFID system adopts a passive working method. [0004] Currently, there are two main UHF radio frequency identificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00
Inventor 李建成王宏义杨青李聪
Owner TIANJIN INST OF ADVANCED TECH
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