计算机工程与应用 ›› 2012, Vol. 48 ›› Issue (16): 103-106.

• 网络、通信、安全 • 上一篇    下一篇

RFID系统标签防碰撞的研究与改进

孙文胜,刘先宝   

  1. 杭州电子科技大学 通信工程学院,杭州 310018
  • 出版日期:2012-06-01 发布日期:2012-06-01

Research and improvement on RFID system tags anti-collision

SUN Wensheng, LIU Xianbao   

  1. College of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
  • Online:2012-06-01 Published:2012-06-01

摘要: RFID系统中标签碰撞是一个常见问题。为解决该问题,基于Gen-2协议提出了一种改进算法,该算法考虑到阅读器对碰撞时隙和空闲时隙的响应时间不同,运用两个不同的C值动态调整Q值,并在碰撞的情况下对时隙进行局部调整,减少了标签的识别通信次数,提高了系统吞吐率,并通过仿真得到验证。

关键词: 防碰撞, Gen-2协议, 无线电频率识别(RFID), Q值

Abstract: In RFID systems, tag collision is a common problem. In order to solve this problem, an improved algorithm based on the Gen-2 protocol is proposed. This algorithm considers the different times of reader’s response to collision and idle slots, and uses two different C values to adjust Q value dynamically. When the tags collision, it will localize adjust slots. The algorithm will reduce the tags’ communication frequency, and increase system throughput rate. It has been verified by the simulation.

Key words: anti-collision, Gen-2 protocol, Radio Frequency Identification(RFID), Q value