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Wakeup signal matching method

A wake-up signal and matching method technology, applied in the field of radio frequency identification, can solve problems such as false wake-up of labels, achieve the effect of reducing volume, reducing cost, and solving false wake-up

Inactive Publication Date: 2012-06-27
TIANJIN ZHONGXING SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem solved by the present invention is to provide a wake-up signal matching method, device and tag, which can solve the defect of active tags being falsely awakened and reduce the power consumption

Method used

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Embodiment Construction

[0036] In order to solve the problem of false wake-up of active tags in the radio frequency identification system, this invention proposes a wake-up signal matching method, the core idea of ​​which is: when the reader communicates with the tag, it sends an air interface command to the tag, and the tag responds to the command of the reader to realize reading The communication between the reader and the tag; the command sent by the reader has a wake-up signal, that is, the notification tag switches from the dormant state to the working state.

[0037] Wherein, the wake-up signal is generally composed of several square waves with a fixed frequency. In order to better judge whether it is a wake-up signal, the present invention specifically adopts the method of 4 consecutive matching square waves. Because it is a square wave, there is no difference in phase. As long as 6 consecutive transition interrupts are caught, it can be considered that 4 square wave matches have been complete...

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Abstract

The invention discloses a wakeup signal matching method and device as well as a tag, which are applied to a radio frequency identification system. The wakeup signal matching method comprises the following steps of: sending a wakeup signal to the tag by a reader, wherein the wakeup signal is composed of a plurality of square waves with certain frequency; and judging whether the tag receives the wakeup signal in a square wave matching manner or not; if so, switching the tag from a dormant state to a working state. According to the method in the radio frequency identification system for solving the error wakeup of the active tag provided by the invention, the cost of the active tag is reduced, the defect of the mistaken wakeup of the active tag is solved, and the power consumption of the active tag is reduced. Furthermore, the volume of the active tag is reduced and various application fields can be met.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a wake-up signal matching method, device and label. Background technique [0002] Radio Frequency Identify (RFID for short) is a non-contact automatic identification technology that automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and can identify multiple tags at the same time, and the operation is fast and convenient. [0003] The RFID system mainly includes tags and readers. RFID includes passive radio frequency identification and active radio frequency identification, and the essential difference between the two lies in the tag side. Tags are specifically divided into active electronic tags, semi-active electronic tags and passive electronic tag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 李龙
Owner TIANJIN ZHONGXING SOFTWARE
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