主动式标签的RFID系统防碰撞算法研究

Research on Anti-collision Algorithm for an Active Tag RFID System

利用防碰撞算法解决标签的碰撞问题是射频识别系统中的一项关键技术。在分析了避免冲突的载波侦听的随机多址接入方式(CSMA)以及基于CSMA技术的标签防碰撞算法的基础上,将预约机制与载波侦听技术相融合,提出了一种新的预约机制的主动标签的RFID防碰撞算法,给出了该算法的实现原理。利用Matlab软件平台对多种防碰撞算法的吞吐量和时延性能进行了分析,通过分析比较发现新算法在提高系统吞吐量和时延性能上的具有优越性。

The application of anti-collision algorithms in solving the problem of labels＇ collision in a RFID system is one of the key technologies. This paper introduces the carrier sense multiple access with collision avoidance （CSMA/CA）, and the anti-collision al- gorithm based on the CSMA technique ; and a new algorithm of anti-collision is proposed by integrating the appointment mechanism with the CSMA Technology. The realization of the principle of the algorithm is given, which indicates that the new algorithm has some ad- vantages on enhancing throughput rate and delay comparing with other algorithms by means of Matlab.