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 …

Age of information (AoI) was introduced in the early 2010s as a notion to characterize the
freshness of the knowledge a system has about a process observed remotely. AoI was …

Information usually has the highest value when it is fresh. For example, real-time knowledge
about the location, orientation, and speed of motor vehicles is imperative in autonomous …

In this paper, we study how to optimally manage the freshness of information updates sent
from a source node to a destination via a channel. A proper metric for data freshness at the …

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 this work, we investigate the design of information-update systems, where incoming
update packets are forwarded to a remote destination through multiple servers (each server …

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 …

Information updates in multihop networks such as Internet of Things (IoT) and intelligent
transportation systems have received significant recent attention. In this paper, we minimize …

We consider a system consisting of N source nodes communicating with a common receiver.
Each source node has a buffer of infinite capacity to store incoming bursty traffic in the form …

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 …