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吉林大学 通信工程学院,吉林 长春 130012
[ "王雪(1984-),女,吉林白山人,博士,吉林大学讲师,主要研究方向为无线传感器网络技术、RFID(射频识别)技术、超宽带通信技术和物联网等。" ]
[ "钱志鸿(1957-),男,吉林长春人,吉林大学教授,博士生导师,主要研究方向为近程无线网络通信技术、无线传感器网络技术、RFID(射频识别)技术、UWB (超宽带)通信技术和物联网等。" ]
[ "刘晓慧(1989-),女,吉林长春人,吉林大学硕士生,主要研究方向为射频识别技术。" ]
[ "程超(1984-),男,吉林长春人,吉林大学博士生,主要研究方向为无线网络技术。" ]
网络出版日期:2015-07,
纸质出版日期:2015-07-25
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王雪, 钱志鸿, 刘晓慧, 等. 改进的树型结构RFID防碰撞算法[J]. 通信学报, 2015,36(7):129-137.
Xue WANG, Zhi-hong QIAN, Xiao-hui LIU, et al. Improved tree structure anti-collision algorithm of RFID[J]. Journal on communications, 2015, 36(7): 129-137.
王雪, 钱志鸿, 刘晓慧, 等. 改进的树型结构RFID防碰撞算法[J]. 通信学报, 2015,36(7):129-137. DOI: 10.11959/j.issn.1000-436x.2015161.
Xue WANG, Zhi-hong QIAN, Xiao-hui LIU, et al. Improved tree structure anti-collision algorithm of RFID[J]. Journal on communications, 2015, 36(7): 129-137. DOI: 10.11959/j.issn.1000-436x.2015161.
将整棵大查询树分为若干分支,在每一个分支内进行标签识别,减少碰撞发生的概率。算法分为前缀确定和分支查询2个阶段,在前缀确定阶段读取所有标签前缀,每个前缀代表一个分支,依次遍历每一分支;查询过程采用后退式搜索策略和动态搜索方式。理论分析和仿真实验表明,算法能够从查询次数、时延、吞吐率多方面改善RFID系统的整体性能。
The whole big query tree is divided into several branches
and the work of tag recognition is executed in each branch
thus reducing the probability of tag collision.The proposed algorithm can be divided into prefix determination and branch query two phases.In the prefix determination phase
the prefix of every tag is identified
and each prefix denotes a branch.Traverse each branch by turns to recognize tags; in the branch query phase
backward search strategy and dynamic search method are used.Theoretical analysis and simulation experiment show that when the improved algorithm can improved the overall performance of RFID system from the aspects of the number of queries
time delay
and throughput.
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