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Zero-forcing precoding frame time slot anti-collision method for RFID system

A technology of zero-forcing precoding and frame time slot, applied in the field of multi-tag reading, which can solve problems such as collision

Inactive Publication Date: 2018-05-18
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a zero-forcing precoded frame time slot RFID system anti-collision method for the collision problem caused by simultaneous communication of tags in a radio frequency identification (RFID) system

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  • Zero-forcing precoding frame time slot anti-collision method for RFID system
  • Zero-forcing precoding frame time slot anti-collision method for RFID system
  • Zero-forcing precoding frame time slot anti-collision method for RFID system

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Embodiment Construction

[0092] The invention will be further illustrated by the following examples.

[0093] Assuming that there are enough tags around the reader, the number of tags is N, and the tag identification starts. , and compare the present invention with ISE-BS algorithm, DGBT algorithm and FSA algorithm, adopt Matlab simulation platform to simulate the total time slot number, throughput rate, collision time slot number and identification time of the method, and the number of tags N takes 50 as the interval Varies between [0,1000].

[0094] (1) Comparison of the total number of time slots.

[0095] image 3It is the comparative situation of the total number of time slots required by the present invention and ISE-BS algorithm, DGBT algorithm and FSA algorithm, as can be seen from the figure, the total time slots required by the present invention is far less than that required by other several algorithms of comparison The total number of time slots, when the number of tags reaches 1000, th...

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Abstract

The invention provides a zero-forcing precoding frame time slot anti-collision method for an RFID system and proposes a parallel anti-collision algorithm based on combination of zero-forcing precodingand a frame time slot ALOHA algorithm. Through the precoding technology, encoding is performed in advance before label transmission, so that error codes or collisions in a transmission and receivingprocess can be reduced. A simulation result indicates that when the total label number is 1000, the throughput rate is around 0.7 and is increased by about 83% compared with that of an ISE-BS algorithm, by about 20% compared with that of a DGBT algorithm, and by about 300% compared with that of an FSA algorithm. According to the invention, the throughput rate and the stability are improved and good application values are achieved in fields requiring quick identification of a large amount of labels.

Description

technical field [0001] The invention belongs to the multi-label reading technology in the communication field, and relates to an anti-collision method for labels in an RFID system. Background technique [0002] Radio Frequency Identification (RFID) is a two-way communication using the transmission characteristics of radio frequency signals and space coupling to realize the non-contact automatic identification technology of objects. With the deepening of today's Internet of Things technology and applications, RFID technology, as one of the core technologies of the Internet of Things, has become a research hotspot today and is widely used in logistics, intelligent transportation, bioelectronics and industrial automation. [0003] In radio frequency identification applications where a large number of tags are congested, conflicts between tags may easily occur in response to the query commands of readers at the same time, that is, tag collisions, or using common tag anti-collisi...

Claims

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Application Information

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IPC IPC(8): G06K7/00G06K7/10
CPCG06K7/0008G06K7/10029
Inventor 张小红张佳琦
Owner JIANGXI UNIV OF SCI & TECH
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