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Active RFID (radio frequency identification device) reader anti-collision method and system based on multiple radio frequency modules

A multi-radio frequency module, radio frequency module technology, applied in the direction of instruments, inductive record carriers, computer parts, etc., can solve the problems of communication conflict, data interference, data mutual interference and collision, etc., to improve safety and reliability, improve processing The effect of efficiency and processing speed

Inactive Publication Date: 2014-02-12
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0003] When the radio frequency identification system is working, there may be more than one electronic tag within the range of the reader at the same time, so if two or more electronic tags send data at the same time, there will be communication conflicts and data interference and collision; the same Sometimes it is also possible that multiple electronic tags are within the working range of multiple readers, and the data communication between them will also cause data interference

Method used

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  • Active RFID (radio frequency identification device) reader anti-collision method and system based on multiple radio frequency modules
  • Active RFID (radio frequency identification device) reader anti-collision method and system based on multiple radio frequency modules
  • Active RFID (radio frequency identification device) reader anti-collision method and system based on multiple radio frequency modules

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Embodiment Construction

[0027] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 Shown is the flow chart of the anti-collision method for active RFID readers based on the multi-radio frequency module in the embodiment of the present invention, specifically including:

[0029] S1. The wake-up module in the reader sends a wake-up signal to the active RFID tags within the coverage of the reader;

[0030] S2. The active RFID tag immediately monitors the surrounding signals after waking up from a periodic sleep state. If it detects the wake-up signal sent by the wake-up module, it uses the anti-collision spread spectrum sequence code to send a signal to the read-write module in the reader; otherwise, the tag Enter the periodic sleep state again;

[0031] S3. There are multiple radio frequency modules in the reading and writing module, and each radio frequency module can receive an anti-collision spread...

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Abstract

The invention discloses an active RFID reader anti-collision method and system based on multiple radio frequency modules. The method mainly comprises the following steps: an active RFID tag is arranged in an RFID system; the RFID and each radio frequency module can only receive a corresponding anti-collision spread spectrum sequence code, so that tag information collision is reasonably avoided. The method improves the processing efficiency and the processing rate of electronic tags through the combination of code division technology, time division technology and modified dynamic time slot ALOHA algorithm, and also improves the operation security and reliability of the system and the anti-collision property through spread spectrum sequence technology communication.

Description

technical field [0001] The invention belongs to the technical field of wireless radio frequency communication, and in particular relates to an anti-collision method and system design of an active RFID reader based on a multi-radio frequency module. Background technique [0002] Radio Frequency Identification (RFID) technology is a technology that realizes non-contact automatic identification through spatial coupling of radio frequency signals (alternating magnetic field or electromagnetic field). The core components of the radio frequency identification system are the reader (receives information from the electronic tag, and can realize the upper management of the entire application system by connecting with the computer) and the electronic tag (remotely wirelessly transmits the information stored by itself to the reader to identify Electronic tags represent the identity of items, people and appliances). [0003] When the radio frequency identification system is working, th...

Claims

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Application Information

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IPC IPC(8): G06K7/00
Inventor 徐展邓翀刘丹叶翔
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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