基于二进制的RFID改进防碰撞算法

Improved RFID Anti-collision Algorithm Based on Binary

防碰撞算法是构成RFID系统的关键技术。在对现有算法分析基础上,论文提出一种改进的基于二进制搜索防碰撞算法,将功率自适应技术和二进制搜索算法相结合,先通过按一定的参数自动调节功率来控制阅读器通信范围,限制进入阅读器识别范围响应标签的数量,再对标签进行识别,从而降低了冲突发生的可能性,提高了标签的识别效率。通过对识别过程进行仿真结果表明,改进的算法改善了防碰撞性能,提高了RFID系统的标签识别效率。

Anti collision algorithm is the key technology of RFID.Based on the analysis of the existing algorithms,an improved anti-collision algorithm based on binary tree searching algorithm is put forward in the paper.Combining the adaptive power technology and binary search algorithm,first,automatically adjusts the power to control the reader communication range by a parameter.Restricted the number of tags access to the reader identification range,then identification the tag,thus reduces the possibility of conflict and improve the efficiency of tag identification.Through the simulation results of recognition process show that： the improved algorithm improves the anti-collision performance and improve the RFID system efficiency of label recognition.