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作 者:王达[1,2] 李晓武[3] WANG Da;LI Xiaowu(Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan 430068,China;School of Information and Technology,Kunming University of Science and Technology,Kunming 650504,China;Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center,Hubei University of Technology,Wuhan 430068,China)
机构地区:[1]湖北工业大学太阳能高效利用湖北省协同创新中心,湖北武汉430068 [2]湖北工业大学湖北省电网智能控制与装备工程技术研究中心,湖北武汉430068 [3]昆明理工大学信息与自动化学院,云南昆明650504
出 处:《铁道学报》2018年第7期88-92,共5页Journal of the China Railway Society
基 金:昆明理工大学引进人才科研启动基金(KKSY201603016)
摘 要:在RFID的应用系统中,动态RFID系统受到越来越多的关注,在该系统中,标签附着在商品表面,在阅读器信号区内沿着固定路径移动,由于标签在信号区的时间有限,因此可能出现标签未识别就离开阅读器信号区。如果标签识别采用原有的基于静态场景的RFID的动态帧时隙ALOHA算法,会出现标签数估计错误问题,这是由于原有的动态帧时隙ALOHA算法没有考虑新标签会源源不断地进入阅读器信号区,这将导致标签识别效率的降低和标签丢失率的增加,本文中新进标签和移出标签对未识别标签数的影响被考虑在新的标签识别算法中。仿真结果表明,本文提出的协议可以有效提高标签识别效率并减少标签的丢失率。In the RFID application systems,more and more researchers pay attention to the dynamic RFID systems,where the tags that are attached to the surface of the commodity move along the fixed path in the reader signal area.Since the time of the tags staying in the signal area is limited,they may leave the reader signal area without being identified.If the tag identification uses the existing dynamic frame slotted ALOHA algorithms based on static RFID systems,there will be a tag estimation error problem.This is because the existing dynamic frame slotted ALOHA algorithm does not consider that continuous entrance of the new tags in the reader signal area will lead to the decrease of tag identification efficiency and the increase of tag loss rate.In the paper,the influence of tag entry and departure on the number of unidentified tags was considered in the new tag identification algorithm.The simulation results show that the proposed protocol can effectively improve the efficiency of tag identification and reduce the tag loss rate.
关 键 词:RFID 防碰撞协议 动态RFID系统 标签丢失率
分 类 号:TP311[自动化与计算机技术—计算机软件与理论]
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