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 …

In recent years, the increasing demand to see the status of objects over the Internet leads to
an increase in the number of Internet of Things (IoT) applications. The unique nature of IoT …

We present a comprehensive steady-state analysis of threshold-ALOHA, a distributed age-
aware modification of slotted ALOHA proposed in recent literature. In threshold-ALOHA …

Information freshness is crucial for time-critical IoT applications, eg, monitoring and control.
We consider an IoT status update system with users, energy harvesting sensors, and a …

We consider a Random Access network with a number of nodes transmitting time-sensitive
information to a wireless base station. Packets are generated according to a stochastic …

This paper considers a wireless network with a base station (BS) conducting timely status
updates to multiple clients via adaptive non-orthogonal multiple access (NOMA)/orthogonal …

In this paper, a dense Internet of Things (IoT) monitoring system is studied in which a large
number of devices contend for transmitting timely status packets to their corresponding …

In this paper, we investigate the age minimization problem for a two-hop relay system, under
a resource constraint on the average number of forwarding operations at the relay. We first …

Age of Information (AoI) has turned to be an outright metric to evaluate information freshness
in Internet of Things (IoT) networks. In this work, we evaluate the average AoI of an uplink …

We consider a random access-based Internet of Things (IoT) system with periodic status
updates. Multiple IoT devices transmit time-stamped status updates, which are generated …