基于功率控制分组的RFID防碰撞算法改进

为了减少阅读器读取标签过程中的查询次数,降低标签发生碰撞的概率,提高系统效率,针对功率控制分组防碰撞算法不能根据标签数动态地进行组数划分,提出了一种改进算法。采用数学分析与二进制算法相结合的方法,找到最优组数,根据最优组数划分阅读器的读取区域,标签分布在划分的组中,阅读器依次读取不同组中的标签。通过划分组数,减少阅读器每次读取的标签数,从而降低标签碰撞的可能性。仿真结果表明,改进算法显著减少了碰撞次数,提高了系统效率。

An Improved RFID Anti-collision Algorithm Based on Power Control

In order to reduce the times readers read the tag in the process of query time, reduce the probability of tag collision and enhance the system efficiency, an improved algorithm is proposed, based on the power control clustering anti-collision algorithm given that the power control clustering algorithm is unable to partition the number of clusters dynamically according to the number of tags. By using the mathematical analysis combined with binary algorithm, the optimal number of clusters is found according to the different tag number and the interrogation zone is divided so that tags are distributed in each cluster and reader turn to read the tags in difference clusters. By dividing the number of group to reduce the number of tags reader reads, the possibility of tag collision is reduced. Simulation results show that the improved algorithm reduces the number of collisions and the system efficiency is enhanced.