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Active RFID reader anti-collision method and system based on multi-radio frequency module

A technology of multi-radio frequency modules and radio frequency modules, which is applied in the direction of instruments, induction recording carriers, computer components, etc., can solve problems such as data interference, communication conflicts, data mutual interference and collision, etc., to improve processing efficiency and processing speed, and improve security Effects on Sex and Reliability

Inactive Publication Date: 2016-07-06
UNIV OF ELECTRONICS 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

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  • Active RFID reader anti-collision method and system based on multi-radio frequency module
  • Active RFID reader anti-collision method and system based on multi-radio frequency module
  • Active RFID reader anti-collision method and system based on multi-radio frequency module

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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 anti-collision method and system for an active RFID reader with multiple radio frequency modules. Multiple radio frequency modules are set in the device, and each radio frequency module can only receive the corresponding anti-collision spread spectrum sequence code, thereby reasonably avoiding the collision of tag information. By combining code division technology, time division technology and improved dynamic time slot ALOHA algorithm, the processing efficiency and processing speed of electronic tags are improved, and the safety and reliability of system work are improved by using direct spread spectrum sequence technology communication, and Anti-collision performance.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00
Inventor 徐展邓翀刘丹叶翔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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