论文标题
及时监视动态源，并通过多个无线传感器进行观察
Timely Monitoring of Dynamic Sources with Observations from Multiple Wireless Sensors
论文作者
论文摘要
信息时代（AOI）最近由于其与物联网感测和监视应用程序相关而受到了很多关注。在本文中，我们考虑了将AOI最小化的问题，在该系统中，多个传感器在多到多的关系中观察到一组来源，以及传感器观察到源取决于源状态的概率。该模型代表了许多实际情况，例如部署多个摄像机或麦克风以监视某些区域移动的对象的情况。我们将调度问题提出为马尔可夫决策过程，并展示如何获得年龄优化的调度策略。我们进一步考虑了问题的部分可观察到的变体，并设计了大型状态空间的近似策略。我们的评估表明，在考虑的情况下，近似政策效果很好，并且传感器可以观察到多种来源的事实是有益的，尤其是在源状态不确定性的情况下。
Age of Information (AoI) has recently received much attention due to its relevance in IoT sensing and monitoring applications. In this paper, we consider the problem of minimizing the AoI in a system in which a set of sources are observed by multiple sensors in a many-to-many relationship, and the probability that a sensor observes a source depends on the state of the source. This model represents many practical scenarios, such as the ones in which multiple cameras or microphones are deployed to monitor objects moving in certain areas. We formulate the scheduling problem as a Markov Decision Process, and show how the age-optimal scheduling policy can be obtained. We further consider partially observable variants of the problem, and devise approximate policies for large state spaces. Our evaluations show that the approximate policies work well in the considered scenarios, and that the fact that sensors can observe multiple sources is beneficial, especially when there is high uncertainty of the source states.
