We summarize recent contributions in the broad area of age of information (AoI). In
particular, we describe the current state of the art in the design and optimization of low …

We examine multiple independent sources providing status updates to a monitor through
simple queues. We formulate an age of information (AoI) timeliness metric and derive a …

In applications of remote sensing, estimation, and control, timely communication is critical
but not always ensured by high-rate communication. This work proposes decentralized age …

A source provides status updates to monitors through a network with state defined by a
continuous-time finite Markov chain. An age of information (AoI) metric is used to …

In this paper, we study how to take samples at a data source for improving the freshness of
received data samples at a remote receiver. We use non-linear functions of the age of …

We consider a cache updating system with a source, a cache and a user. There are n files.
The source keeps the freshest version of the files which are updated with known rates λ i …

We consider a resource-constrained updater, such as Google Scholar, which wishes to
update the citation records of a group of researchers, who have different mean citation rates …

We consider an information update system where an information receiver requests updates
from an information provider in order to minimize its age of information. The updates are …

In this work, a wireless broadcast network with a base station (BS) sending random time-
sensitive information updates to multiple users under bandwidth constraint is considered. To …

Emerging applications, such as smart factories and fleets of drones, increasingly rely on
sharing time-sensitive information for monitoring and control. In such application domains, it …