论文标题
超出年龄：状态更新系统中及时保证的信息紧迫
Beyond Age: Urgency of Information for Timeliness Guarantee in Status Update Systems
论文作者
论文摘要
及时的状态更新对于涉及远程监控和控制的未来应用至关重要，例如自动驾驶和工业物联网（IIOT）。已经提出了信息年龄（AOI）来衡量状态更新的新鲜度。但是，它无法捕获关键的系统上下文信息，该信息表明状态信息的随时间变化的重要性以及状态的动态演变。在本文中，我们提出了一个基于上下文的指标，即信息的紧迫性（UOI），以评估状态更新的及时性。与AOI相比，新的指标同时结合了随时间变化的上下文信息和动态状态的演变，这可以对基于上下文的自适应状态更新方案进行分析，以及更有效的远程监视和控制。研究了具有更新频率约束的状态更新终端的平均UOI的最小化，并提出了基于更新的自适应方案。仿真结果表明，所提出的方案实现了近距离的性能，计算复杂性低。
Timely status updating is crucial for future applications that involve remote monitoring and control, such as autonomous driving and Industrial Internet of Things (IIoT). Age of Information (AoI) has been proposed to measure the freshness of status updates. However, it is incapable of capturing critical systematic context information that indicates the time-varying importance of status information, and the dynamic evolution of status. In this paper, we propose a context-based metric, namely the Urgency of Information (UoI), to evaluate the timeliness of status updates. Compared to AoI, the new metric incorporates both time-varying context information and dynamic status evolution, which enables the analysis on context-based adaptive status update schemes, as well as more effective remote monitoring and control. The minimization of average UoI for a status update terminal with an updating frequency constraint is investigated, and an update-index-based adaptive scheme is proposed. Simulation results show that the proposed scheme achieves a near-optimal performance with a low computational complexity.
