The Age of Information (AoI) is an end-to-end metric frequently used to understand how "fresh" the information about a remote system is. In this paper, we present an experimental study of the relationship between AoI and the energy spent by the device that produces information, e.g. an IoT device or a monitoring sensor. Such a relationship has been almost neglected so far, but it is particularly important whenever the sensing side is battery-operated. The study is carried out in a scenario where access is achieved via the cellular network and information is transferred using MQTT, a popular messaging protocol in the IoT domain. Numerous parameters of operation are considered, and the most efficient solutions in all configurations are provided.

翻译：信息年龄（AoI）是一种常用于理解远程系统信息“新鲜度”的端到端指标。本文通过实验研究了AoI与信息产生设备（例如物联网设备或监测传感器）能耗之间的关系。这种关系迄今几乎被忽视，但在感知端由电池供电的情况下尤为重要。本研究在通过蜂窝网络接入并使用MQTT（物联网领域常用的消息协议）传输数据的场景下展开。我们考虑了多种运行参数，并给出了所有配置下最高效的解决方案。