基于時隙ALOHA的RFID防沖突算法和隨機幀時隙防沖突算法的吞吐量研究
摘 要
無線射頻識別系統要實現同時閱讀現場多個 RFID 標簽的關鍵技術在于找到防沖突算法來解決 RFID 標簽發送數據的沖突問題。本文首先對基于時隙 ALOHA 的各種防沖突算法進行研究比較和分析,然后給出仿真結果;接著,說明各種不同的標簽預測方法和信息幀設置調整方法對系統響應時間和識別效率的影響;最后,針對自適應調整方法的防沖突算法及其實現方案進行了進一步仿真分析。
【關鍵詞】:防沖突算法;無線射頻識別; ALOHA;標簽預測;自適應調整
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 eva luates 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