一种新的具有鲁棒性动态二进制时隙防碰撞算法

A New Robust Dynamically Slotted Anti-Collision Algorithm

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。

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 identifica tions is reduced by 55% using this method compared to the conventional BSA with a good performance in robustness.