基于时隙ALOHA的RFID防冲突算法和随机帧时隙防冲突算法的吞吐量研究
摘 要
无线射频识别系统要实现同时阅读现场多个 RFID 标签的关键技术在于找到防冲突算法来解决 RFID 标签发送数据的冲突问题。本文首先对基于时隙 ALOHA 的各种防冲突算法进行研究比较和分析,然后给出仿真结果;接着,说明各种不同的标签预测方法和信息帧设置调整方法对系统响应时间和识别效率的影响;最后,针对自适应调整方法的防冲突算法及其实现方案进行了进一步仿真分析。
【关键词】:防冲突算法;无线射频识别; ALOHA;标签预测;自适应调整
Abstract
The key technology in reading multiple tags simultaneously is to find an Anti-collision algorithm to solve the data transmission collision in RFID system. This paper first studies several Slotted ALOHA based Anti-collision algorithms, then compares、 analysis and gives out the simulation results; Second, the paper evaluates the influence on the total delay of identification and system efficiency when we try in different ways on tag estimation and frame size adjustment; Finally, the paper further simulates and analyses the adaptive adjustment Anti-collision algorithm, and gives out the results as well.
Keywords: Anti-collision algorithm;RFID;ALOHA;Tag Estimation;Frame Size
Adjustment;Adaptive adjustment