一种RFID多标签碰撞检测方法  

Method for Detecting the Collision of Multiple RFID Tags

作　　者：刘丹[1] 魏鹏[1] 谭杰[2] 李波[1] 王俊宇[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203 [2]中国科学院自动化研究所,北京100080

出　　处：《小型微型计算机系统》2009年第9期1890-1894,共5页Journal of Chinese Computer Systems

基　　金：国家"八六三"高技术研究发展计划基金项目(2006AA04A103)资助

摘　　要：提出一种适用于射频识别(RFID)读写器的多标签碰撞检测方法,并进行了电路实现和测试验证.该方法通过读写器数字接收机解码模块检测接收信号是否违反数据编码规则,判断标签的返回信号是否发生了碰撞,生成碰撞指示信号.测试表明该方法的正确率可达到99%,能为各种基于时隙ALHOA的随机型多标签防碰撞算法的实现提供有效支持.对几种常见的RFID多标签防碰撞算法的实测结果表明,应用碰撞检测技术后读写器的多标签识别速度提高了约30～40%.A method for detecting collision of multiple RFID （Radio Frequency Identification） tags is proposed and implemented in a RFID reader compliant with the ISO/IEC18000-6C standard. The collision flag for RFID tags are generated by the decode module of the digital receiver of RFID reader through detecting the received signals＇violations against the data encoding principals specified in the RFID standard. According to the test results, the precision of the proposed method is up to 99 percent, which makes it a reliable foundation for the implementation of ALOHA-based anti-collision algorithms in RFID readers. After adopting the proposed collision detection method in several anti-collision algorithms for multiple RFID tags, the test result shows that the identification throughput of RFID reader can be improved about 30 - 40 percent on average.

关 键 词：碰撞检测 射频识别 防碰撞 

分 类 号：TP331[自动化与计算机技术—计算机系统结构]