• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2011, Vol. 33 ›› Issue (10): 169-173.

• 论文 • 上一篇    下一篇

一种新的具有鲁棒性动态二进制时隙防碰撞算法

汪济洲,刘〓伟   

  1. (合肥学院电子信息与电气工程系,安徽 合肥 230061)
  • 收稿日期:2010-09-20 修回日期:2010-12-25 出版日期:2011-10-25 发布日期:2011-10-25

A New Robust Dynamically Slotted AntiCollision Algorithm

WANG Jizhou,LIU Wei   

  1. (Department of Electronic Information and Electrical Engineering,Hefei University,Hefei 230061,China)
  • Received:2010-09-20 Revised:2010-12-25 Online:2011-10-25 Published:2011-10-25

摘要:

在射频识别系统中,由于信道共享的原因,会发生标签碰撞现象,从而导致阅读器的漏读,因此防碰撞算法在射频识别系统的设计中占有极其重要的地位。现有传统的动态二进制时隙防碰撞算法具有对标签要求不高的优点,非常适用于采用被动标签的RFID系统,但实际使用过程中,由于距离等外界因素会出现弱标签现象,现有算法对此不具有鲁棒性。因此,本文提出一种新的具有鲁棒性动态二进制时隙防碰撞算法,该算法在传统的动态二进制时隙防碰撞算法的基础上,增加一个未确定的标签队列,大大提高了系统的鲁棒性。实验显示该算法比传统BSA识别次数减少55%,同时保证了较好的鲁棒性。

关键词: 射频识别系统, 防碰撞算法, 鲁棒性

Abstract:

An anticollision algorithm is very important in the RFID systems. The present DBS protocol is good for passive tags. However, in the real world, there is a high probability of the existence of a weak tag due to the long distance. The existing DBS is not robust against this problem. This paper presents a novel robust dynamically slotted anticollision algorithm based upon DBS. We suggest an uncertain queue to solve this problem based on DBS. The results show that the total number of identifications is reduced by 55% using this method compared to the conventional BSA with a good performance in robustness.

Key words: RFID system;anticollision algorithm;robust