一种基于多级功率的RFID阅读器能效增强算法研究

Enhanced energy efficiency algorithm of RFID reader based on multistage power

针对便携式射频识别(radio frequency identification,RFID)阅读器在低能效情况下使用时间有限,读取信息不准确的问题,提出自适应多级功率及动态时隙算法。该算法利用标签和阅读器通信过程中的3种不同状态,依据通信时隙的占用情况,估算出阅读器识别范围内标签的数量,再根据标签的估计值动态改变阅读器的功率电平。实验结果表明,随着标签数量的变化,阅读器功率电平动态调整,系统内标签的响应速率得到了有效的提高,且达到了减小能耗的目的。

To solve the problem that the using time of portable radio frequency identification （RFID）reader is limited, and its reading information is inaccurate in low efficiency, the self-adaptive multistage power and dynamic timeslot（AMPDT） al- gorithm is proposed. It uses the three different states in the process communication of tags and readers. Firstly, based on the occupation situation of the communication timeslot, the number of tags within range is estimated. Then, according to the estimate dynamic the power level of reader is adjusted. The results show that along with the change of tag number, reader power level dynamic adjustment, the response rate tags within the system have been effectively improved and achieve the purpose of reducing the energy consumption.