论文标题
具有优先级的多跳网络的信息年龄
Age of Information in Multi-hop Networks with Priorities
论文作者
论文摘要
信息年龄是实时状态更新跟踪应用程序中使用的新指标。它在目的地测量以来最后一个收到的数据包以来经过的时间。在本文中，我们考虑了两跳系统中关键和非关键状态更新的共存，网络为此分配了不同的调度优先级。具体而言，由于延迟性能较差，因此很高的优先级保留给遍历两个节点的数据包。我们获得年龄的分布及其自然上限称为峰值年龄。我们为优先更新提供了紧密的上限和下限，以及具有一般服务分布的数据包的非关键流动流的精确表达式。结果为年龄敏感的多跳系统设计提供了基本见解。
Age of Information is a new metric used in real-time status update tracking applications. It measures at the destination the time elapsed since the generation of the last received packet. In this paper, we consider the co-existence of critical and noncritical status updates in a two-hop system, for which the network assigns different scheduling priorities. Specifically, the high priority is reserved to the packets that traverse the two nodes, as they experience worse latency performance. We obtain the distribution of the age and its natural upper bound termed peak age. We provide tight upper and lower bounds for priority updates and the exact expressions for the non-critical flow of packets with a general service distribution. The results give fundamental insights for the design of age-sensitive multi-hop systems.
