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 …

An energy-harvesting sensor node that is sending status updates to a destination is
considered. The sensor is equipped with a battery of finite size to save its incoming energy …

This work is motivated by the need of collecting fresh data from power-constrained sensors
in the industrial Internet of Things (IIoT) network. A recently proposed metric, the Age of …

We consider an Internet of Things (IoT) monitoring system, in which an IoT device monitors a
physical process and transmits randomly generated status updates to its associated access …

In this letter, we deal with the age of information (AoI) for a sensor network with wireless
power transfer (WPT) capabilities. Specifically, we study a simple network topology, where a …

We consider the average age of information in G/G/1/1 systems under two service discipline
models. In the first model, if a new update arrives when the service is busy, it is blocked; in …

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 …

The freshness of status information is of great importance for time-critical Internet-of-Things
(IoT) applications. A metric measuring status freshness is the Age of Information (AoI), which …

This paper investigates a multi-node wireless powered communication network (WPCN),
where a hybrid access point (HAP) first charges an Internet of Thing (IoT) device wirelessly …