信息网络安全

信息网络安全 ›› 2018, Vol. 18 ›› Issue (2): 34-39.doi: 10.3969/j.issn.1671-1122.2018.02.005

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基于帧时隙的RFID系统迫零预编码防碰撞算法研究

张小红(), 张佳琦   

  1. 江西理工大学信息工程学院, 江西赣州 341000
  • 收稿日期:2017-10-30 出版日期:2018-02-20 发布日期:2020-05-11
  • 作者简介:

    作者简介：张小红（1966—）,女,河北,教授,博士,主要研究方向为非线性动力学、视频保密通信;张佳琦（1994—）,女,江西,硕士研究生,主要研究方向为信息安全、RFID标签防碰撞算法。

  • 基金资助:
    国家自然科学基金[61363076,61763017];江西省自然科学基金[20161BAB202053,20161BAB206145];江西省研究生创新专项资金[YC2016-S318]

Research on the Zero-forcing Precoding Anti-collision Algorithm Based on Frame Slot for RFID System

Xiaohong ZHANG(), Jiaqi ZHANG   

  1. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China
  • Received:2017-10-30 Online:2018-02-20 Published:2020-05-11

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摘要：

文章针对RFID系统识别标签数量大量增多时,帧时隙ALOHA算法可能出现标签识别率降低和标签“饿死”等问题,提出一种基于帧时隙的迫零预编码算法。通过预编码技术使标签在发送之前提前编码,从而减少标签在传输或接收过程中发生误码或碰撞的情况。仿真结果表明,该算法提高了标签识别率和稳定性。当标签总数为1000时,文章算法的标签识别率为0.7左右,比ISE-BS算法提高了约83%,比DGBT算法提高了约20%,比FSA算法提高了约300%。

关键词: 射频识别, 防碰撞, 帧时隙ALOHA算法, 迫零预编码, 标签识别率

Abstract:

Aiming at the number of identification tags in RFID system increasing largely, tag identification rate reducing and tag starving may appear in frame-slotted ALOHA algorithm, this paper proposes a zero-forcing precoding algorithm based on frame time slot. The tags can be coded before be transferring with the technology of zero-forcing precoding, while reduces errors and collisions in the process of tags transmitting or be receiving. The simulation results show that the algorithm promotes the tag identification rate and the stability. When tags number is about 1000, tag identification rate of the algorithm is about 0.7. Compared with ISE-BS algorithm, DGBT algorithm and FSA algorithm, the algorithm enhances tag identification rate by 83%, 20% and 300% respectively.

Key words: radio frequency identification, anti-collision, frame-slotted ALOHA algorithm, zero-forcing precoding, tag identification rate

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