血液管理RFID多标签识别碰撞避免方法  

Multi-tag identification and collision avoidance with RFIDs in blood management

作　　者：田川 叶晓俊[1] 王祖良[2] 李鑫[3] 

机构地区：[1]清华大学软件学院,北京100081 [2]西京学院信息工程学院,西安710123 [3]装甲兵工程学院,北京100072

出　　处：《清华大学学报（自然科学版）》2017年第11期1121-1126,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金重大项目(61190110)

摘　　要：EPCglobal_Class1Gen2协议标准中的动态帧时隙ALOHA标签防碰撞Q算法没有完全消除空时隙,浪费了时序资源,在血液管理这种实时性要求高、标签数量大的情况下是不能接受的。该文提出一种多标签识别碰撞避免方法,将标签识别过程分为两次时隙预分配和标签识别2个阶段,消除了Class1Gen2协议的空时隙以提高时间利用率。对血液管理应用场景进行了数值仿真分析,结果表明该方法能够显著提高标签识别效率。The dynamic frame slotted ALOHA tag anti-collision Q algorithm in the EPCglobal Classl Gen2 protocol fails to remove empty slots, which leads to a waste of the slots. This is unacceptable in blood management which requires real-time handling and a large number of tags. A multi-tag identification and collision avoidance method was developed that divides the tag identification into two slot pre-assignments and tag identification. This helps eliminate empty slots in the Classl Gen2 protocol which improves availability. Simulations of a blood management system indicate that this method significantly improves tag identification efficiency.

关 键 词：射频识别 碰撞避免 动态帧时隙ALOHA 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术]