论文标题
按需新鲜度：优化查询过程的信息时代
Freshness on Demand: Optimizing Age of Information for the Query Process
论文作者
论文摘要
信息时代（AOI）已成为通信中的重要概念，因为它允许系统设计人员测量可用于远程监视或控制过程的信息的新鲜度。但是，其默认的定义假定随时使用新信息，这种情况并非总是如此，并且收集和使用的信息的瞬间取决于某个查询过程。我们提出了一个模型，该模型考虑了许多监视过程的离散时间性质，考虑到基于拉动的通信模型，在该模型中，信息的新鲜度仅在接收器生成查询时才很重要。然后，我们在查询（QAOI）的信息时代定义了一个更通用的指标，它适合基于拉的场景，并显示其优化如何与传统的基于基于推动的AOI优化的选择在使用数据包擦除通道（PEC）时非常不同。
Age of Information (AoI) has become an important concept in communications, as it allows system designers to measure the freshness of the information available to remote monitoring or control processes. However, its definition tacitly assumed that new information is used at any time, which is not always the case and the instants at which information is collected and used are dependent on a certain query process. We propose a model that accounts for the discrete time nature of many monitoring processes, considering a pull-based communication model in which the freshness of information is only important when the receiver generates a query. We then define the Age of Information at Query (QAoI), a more general metric that fits the pull-based scenario, and show how its optimization can lead to very different choices from traditional push-based AoI optimization when using a Packet Erasure Channel (PEC).
