In the Internet of things (IoT), the energy-saving of battery-powered IoT terminal is a key problem. To address it, a novel transceiver is proposed, and a transmission scheme is presented by exploiting the fading characteristic of the wireless channel. Based on the novel transceiver design, the IoT terminal can periodically observe the wireless channel gain and determine the appropriate time to upload information to the base station (BS). When the instantaneous wireless channel gain is lower than the wireless channel gain threshold that can be found using optimal stopping rules, the IoT keeps silent and continues to observe the wireless channel gain while when it is higher than the threshold, the IoT terminal uploads its information to the BS. We analyze the energy consumption performance of the proposed transmission scheme and compare it with that of the normal transmission scheme which transmits the information to the BS regardless of the instantaneous wireless channel gain. Simulations results show that the proposed transmission scheme significantly outperforms the normal ones especially under the scenarios featuring long information bits, low received signal-to-noise, and small Rician factor.

在物联网（IoT）中，电池供电的IoT终端的节能是一个关键问题。为了解决这个问题，提出了一种新颖的收发器，并通过利用无线信道的衰落特性提出了一种传输方案。基于新颖的收发器设计，IoT终端可以定期观察无线信道增益并确定将信息上载到基站（BS）的适当时间。当瞬时无线信道增益低于使用最佳停止规则可以找到的无线信道增益阈值时，IoT会保持沉默并继续观察无线信道增益，而当无线信道增益高于阈值时，IoT终端会上载其信息到BS。我们分析了所提出的传输方案的能耗性能，并将其与正常传输方案的能耗性能进行了比较，后者将信息传输到BS，而不考虑瞬时无线信道增益。仿真结果表明，所提出的传输方案明显优于常规传输方案，特别是在信息比特长，接收信噪比低，Rician因子小的情况下。