【摘要】 无线识别感知平台(Wireless Identification and Sensing Platform,WISP)可以从RFID(Radio Frequency Identification)阅读器发射的超高频信号中获取能量,为其内置低功耗微控制器和传感器供电,将传感器采集的数据传递到阅读器。提出基于否定应答(Negative Acknowledgement,NAK)的数据传输方案,可以克服WISP因传递的数据包重复比率太高而浪费信道这一弊端。实验结果表明:所提方案可以有效地降低数据包的重复比率,提高有效吞吐率。更多还原

【Abstract】 The wireless identification and sensing platform(WISP)is able to harvest energy from the ultra-high-frequency(UHF)signals transmitted by the radio frequency identification(RFID)reader so as to power the microprocessor and sensors inside the WISP and deliver the data captured by the sensors to the reader.The NAK(negative acknowledgement)based data delivery scheme was presented which can remedy the problem of wasting channel in WISP due to high ratio of duplicated packets being transmitted.The experimental results show that the proposed scheme is able to reduce the ratio of duplicated packets and improve the effective throughput.更多还原