论文标题
反馈在有限的传输机会下在AOI优化中的作用
The Role of Feedback in AoI Optimization Under Limited Transmission Opportunities
论文作者
论文摘要
从遥控传感器安排更新是物联网（IoT）的关键任务。在这种情况下，信息时代的数学概念通常用于捕获接收到的数据的新鲜度。反过来，这与优化交换的频率有关，特别是对于资源约束（例如，能量限制）传感器而言。大多数对该主题的调查都假设发射器可以利用接收者端信息时代的知识来决定何时发送数据，即使通信渠道不可靠。实际上，跟踪更新的结果将需要更多的资源消费才能获得反馈。我们为一个有限的传感器研究了有限的时间范围内的最佳更新时间表，该传感器被允许执行有限数量的更新，这是IoT设备的典型特征。我们讨论了接收器的反馈作用，以及每当引起额外的能耗并因此允许传输较少数量的更新时，是否方便地要求它。我们在分析上确定了反馈成本的区域以及使用反馈可能是有益的渠道的可靠性。
Scheduling updates from remote sensors is a key task for the internet of things (IoT). In this context, the mathematical concept of age of information is often used to capture the freshness of received data. This is, in turn, relevant to optimize the frequency of the exchanges, especially for resource constrained (e.g., energy-limited) sensors. Most investigations on the subject assume that the transmitter can leverage knowledge of the age of information at the receiver side to decide when to send data, even when the communication channel is unreliable. In reality, tracking the outcome of the updates would require additional consumption of resources to acquire a feedback. We investigate the optimal schedule of updates over a finite time horizon for a resource-constrained sensor that is allowed to perform a limited number of updates, as typical of IoT devices. We discuss the role of the feedback from the receiver, and whether it is convenient to ask for it whenever this causes additional energy consumption and consequently allows the transmission of a lower number of updates. We analytically identify regions for the feedback cost and the reliability of the channel where making use of feedback may or may not be beneficial.
