摘要
ISO18000-6C协议采用时槽ALOHA算法解决多标签识别时产生的碰撞问题,可同时识别多个标签,协议中的Q值决定了解决碰撞时所用的时槽数。时槽数越多,标签越不容易碰撞,但识别时间却越长,因此,动态改变Q值可以在标签识别时间和识别标签数之间找到最佳点。在复杂环境下,采用多天线,并结合动态Q值算法,可提高多标签识别率,解决多标签识别效率和漏读率的问题。在多标签盘点过程中,利用Session参数来过渡天线间切换,使识别过的标签不会被下一个天线识别。仿真分析了这种多天线盘点多标签流程的性能。
The Slotted ALOHA algorithm of EPC-C1 G2 protocol is used to solve the collision problem in the multitag inventory. The Q value of protocol decides the slot count of anti-collision algorithm. If the amount of slot is larger,the collision of tags happens less,but the time of inventory of all tags becomes longer. The Q value is properly selected so that the best point between the inventory time and the number of tags can be found. In the complex situation,using multi-antenna and dynamic Q algorithm can improve the identification accuracy of tag. In the inventory of tags,utilizing session parameter can eliminate the trouble of switching antennas. Identified tags may not be queried by the next antenna.The performance of multi-antenna querying multi-tag is simulated and analyzed.
出处
《仪表技术》
2017年第12期20-23,共4页
Instrumentation Technology
关键词
超高频
射频识别
防碰撞算法
标签
会话参数
ultra-high frequency （UHF）
radio-frequency identification （ RFID ）
anti-collision algorithm
tag
session
