论文标题
关于状态更新系统中信息的年龄和价值
On Age and Value of Information in Status Update Systems
论文作者
论文摘要
由许多网络物理应用中产生的数据包的固有值（例如，由于信息内容或警报消息的精确度），我们考虑具有更新数据包的状态更新系统以及带有值的更新数据包以及其发电时间戳。生成后，状态更新数据包具有随机的初始值和确定性截止日期，之后它没有用处（最终的陈旧性）。在我们的模型中，数据包的价值随着时间的流逝（即使在接收之后）从其产生到消失时的最终造时间降低。接收器的信息值（VOI）是加性的，因为VOI是接收器持有的所有数据包的当前值的总和。我们研究了价值和服务时间之间潜在依赖性的各种排队学科，并为接收器的平均VOI提供封闭的表格表达式。数值结果说明了不同情况的平均VOI以及信息的平均年龄（AOI）和平均VOI之间的对比度。
Motivated by the inherent value of packets arising in many cyber-physical applications (e.g., due to precision of the information content or an alarm message), we consider status update systems with update packets carrying values as well as their generation time stamps. Once generated, a status update packet has a random initial value and a deterministic deadline after which it is not useful (ultimate staleness). In our model, value of a packet decreases in time (even after reception) starting from its generation to ultimate staleness when it vanishes. The value of information (VoI) at the receiver is additive in that the VoI is the sum of the current values of all packets held by the receiver. We investigate various queuing disciplines under potential dependence between value and service time and provide closed form expressions for average VoI at the receiver. Numerical results illustrate the average VoI for different scenarios and the contrast between average age of information (AoI) and average VoI.
