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The Age of Information (AoI) is a performance metric that quantifies the freshness of data in systems where timely updates are critical. Most state-of-the-art methods typically assume that packets enter the monitored system with zero age,…

Information Theory · Computer Science 2025-12-01 Fernando Miguelez , Urtzi Ayesta , Josu Doncel , Maria Dolores Ugarte

Age of information (AoI) is a performance metric that captures the freshness of status updates. While AoI has been studied thoroughly for point-to-point links, the impact of modern random-access protocols on this metric is still unclear. In…

Information Theory · Computer Science 2021-12-03 Khac-Hoang Ngo , Giuseppe Durisi , Alexandre Graell i Amat

We investigate the age-of-information (AoI) in the context of random access networks, in which transmitters need to send a sequence of information packets to intended receivers over shared spectrum. We establish an analytical framework that…

Information Theory · Computer Science 2020-09-22 Howard H. Yang , Ahmed Arafa , Tony Q. S. Quek , H. Vincent Poor

New technologies for sensing and communication act as enablers for cooperative driving applications. Sensors are able to detect objects in the surrounding environment and information such as their current location is exchanged among…

Multiagent Systems · Computer Science 2023-10-12 Julian Heinovski , Jorge Torres Gómez , Falko Dressler

While age of Information (AoI) has gained importance as a metric characterizing the fresh-ness of information in information-update systems and time-critical applications, most previous studies on AoI have been theoretical. In this chapter,…

Networking and Internet Architecture · Computer Science 2021-06-07 Elif Uysal , Onur Kaya , Sajjad Baghaee , Hasan Burhan Beytur

Age of Information (AoI) has gained importance as a Key Performance Indicator (KPI) for characterizing the freshness of information in information-update systems and time-critical applications. Recent theoretical research on the topic has…

Networking and Internet Architecture · Computer Science 2019-08-29 Hasan Burhan Beytur , Sajjad Baghaee , Elif Uysal

Age-of-information (AoI) is a metric quantifying information freshness at the receiver. It captures the delay together with packet loss and packet generation rate. However, the existing literature focuses on average or peak AoI and neglects…

Information Theory · Computer Science 2020-02-28 Onur Ayan , H. Murat Gürsu , Arled Papa , Wolfgang Kellerer

Age of information (AoI) is an effective measure to quantify the information freshness in wireless status update systems. It has been further validated that the peak AoI has the potential to capture the core characteristics of the aging…

Systems and Control · Electrical Eng. & Systems 2024-06-05 Yuquan Xiao , Qinghe Du , George K. Karagiannidis

Age of Information (AoI) has become an important concept in communications, as it allows system designers to measure the freshness of the information available to remote monitoring or control processes. However, its definition tacitly…

Networking and Internet Architecture · Computer Science 2022-02-02 Federico Chiariotti , Josefine Holm , Anders E. Kalør , Beatriz Soret , Søren K. Jensen , Torben B. Pedersen , Petar Popovski

Age of Information (AoI) has become an important concept in communications, as it allows system designers to measure the freshness of the information available to remote monitoring or control processes. However, its definition tacitly…

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 captures the time elapsed from the status being…

Networking and Internet Architecture · Computer Science 2020-03-25 Rui Li , Qian Ma , Jie Gong , Zhi Zhou , Xu Chen

Age-of-information (AoI) is a novel metric that measures the freshness of information in status update scenarios. It is essential for real-time applications to transmit status update packets to the destination node as timely as possible.…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-01-15 Qiaobin Kuang , Jie Gong , Xiang Chen , Xiao Ma

A new timeliness metric, called Age-of-Information (AoI), has recently attracted a lot of research interests for real-time applications with information updates. It has been extensively studied for various queueing models based on the…

Information Theory · Computer Science 2023-02-17 Zhongdong Liu , Yu Sang , Bin Li , Bo Ji

Age of Information (AoI) is a crucial metric for quantifying information freshness in real-time systems where the sampling rate of data packets is time-varying. Evaluating AoI under such conditions is challenging, as system states become…

Information Theory · Computer Science 2025-07-08 Jin Xu , Weiqi Wang , Natarajan Gautam

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 gateway. This is the case, for instance, of remote sensing,…

Networking and Internet Architecture · Computer Science 2021-02-16 Andrea Munari

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-latency cyberphysical systems and applications in which sources…

Information Theory · Computer Science 2020-07-20 Roy D. Yates , Yin Sun , D. Richard Brown , Sanjit K. Kaul , Eytan Modiano , Sennur Ulukus

Age of Information (AoI), namely the time that has elapsed since the most recently delivered packet was generated, is receiving increasing attention with the emergence of many real-time applications that rely on the exchange of…

Information Theory · Computer Science 2024-05-08 Xinlu Dai , Cyril Leung

The freshness of status updates is imperative in mission-critical Internet of things (IoT) applications. Recently, Age of Information (AoI) has been proposed to measure the freshness of updates at the receiver. However, AoI only…

Information Theory · Computer Science 2020-03-03 Wenrui Lin , Xijun Wang , Chao Xu , Xinghua Sun , Xiang Chen

The age of information (AoI) performance metric for point-to-point wireless communication systems is analytically studied under Rician-faded channels and when the receiver is equipped with multiple antennas. The general scenario of a…

Information Theory · Computer Science 2022-01-03 Nikolaos I. Miridakis , Theodoros A. Tsiftsis , Guanghua Yang

Age of information (AoI) is a recently proposed metric for measuring information freshness. AoI measures the time that elapsed since the last received update was generated. We consider the problem of minimizing average and peak AoI in a…

Information Theory · Computer Science 2019-12-10 Rajat Talak , Sertac Karaman , Eytan Modiano
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