射频识别系统中的防碰撞算法  

Anti-collision algorithm for RFID systems

作　　者：刘冬生[1] 邹雪城[1] 李泳生[1] 李孝煌[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第9期57-59,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：研究了多个射频识别RFID(radio frequency identification)电子标签被同时处理的防碰撞算法.分析了时隙ALOHA法和二进制搜索法两种可用于RFID系统中的防碰撞算法原理,给出了超高频频段RFID系统的防碰撞解决方案,ISO/IEC 18000-6 A型采用时隙ALOHA法,ISO/IEC 18000-6 B型采用二进制搜索法;已成功将二进制搜索法应用于基于ISO/IEC15693标准的无源高频(13.56 MHz)RFID电子标签芯片设计的实际项目中,整个芯片设计工艺采用了中芯国际(SMIC)2P3M 0.35μm带嵌入式EEPROM的混合信号CMOS技术,实验结果表明此芯片能够实现防碰撞功能.An anti-collision algorithm is studied to handle multiple radio frequency identification （RFID） tags simultaneously. The reason why both time slot ALOHA algorithm and binary tree one can be used in anti-collision algorithm for RFID system was analyzed. A scheme for RFID system working in UHF is proposed., time slot ALOHA anti-collision algorithm is used for ISO/IEC 18000-6 Type A and binary tree anti-collision algorithm for ISO/IEC 18000-6 Type B. The binary tree algorithm has been used successfully in a chip design of ISO/IEC15693-based passive RFID tag IC, operat- ing in the 13.56 MHz. SMIC 0.35μm three-metal two-poly mixed signal CMOS technology with embedded EEPROM was used in this design. The experimental results indicate that the anti-collision functions can be realized by the tag IC.

关 键 词：射频识别 防碰撞 时隙ALOHA法 二进制搜索法 标签芯片 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]