In the coming sixth generation (6G) communication era, to provide seamless and ubiquitous
connections, the space-air-ground-sea integrated network (SAGSIN) is envisioned to …

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 …

Abstract Space Information Network (SIN) is a multi-purpose heterogeneous network. Due to
the large-scale of SIN, its secure and stable operation is vulnerable to various threats. Much …

The effective operation of time-critical Internet of things (IoT) applications requires real-time
reporting of fresh status information of underlying physical processes. In this paper, a real …

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 …

Age of information (AoI) is gaining attention as a valuable performance metric for many IoT
systems, in which a large number of devices report time-stamped updates to a central …

In this paper, we investigate a network where N links contend for the channel using the well-
known carrier sense multiple access scheme. By leveraging the notion of stochastic hybrid …

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 star-topology wireless network for status update where a central node
collects status data from a large number of distributed machine-type terminals that share a …

We consider a joint sampling and scheduling problem for optimizing data freshness in multi-
source systems. Data freshness is measured by a non-decreasing penalty function of age of …