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Age of Information (AoI) is a metric and KPI that has been developed for measuring and controlling data freshness. Optimization of AoI in a real-life network requires adapting the rate and timing of transmissions to varying network…

Networking and Internet Architecture · Computer Science 2025-04-14 Sajjad Baghaee , Elif Uysal

The Age of Information (AoI) has recently gained recognition as a critical quality-of-service (QoS) metric for quantifying the freshness of status updates, playing a crucial role in supporting massive ultra-reliable and low-latency…

Systems and Control · Electrical Eng. & Systems 2024-10-17 Jingqing Wang , Wenchi Cheng , Wei Zhang

Ensuring timely and semantically accurate information delivery is critical in real-time wireless systems. While Age of Information (AoI) quantifies temporal freshness, Version Age of Information (VAoI) captures semantic staleness by…

Networking and Internet Architecture · Computer Science 2026-01-27 Haoyuan Pan , Sizhao Chen , Zhaorui Wang , Tse-Tin Chan

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

Popular methods to quantify transmitted data quality are the Age of Information (AoI), the Query Age of Information (QAoI), and the Age of Incorrect Information (AoII). We consider these metrics in a point-to-point wireless communication…

Information Theory · Computer Science 2025-03-18 Wanja de Sombre , Andrea Ortiz , Frank Aurzada , Anja Klein

Many emerging Internet of Things (IoT) applications rely on information collected by sensor nodes where the freshness of information is an important criterion. \textit{Age of Information} (AoI) is a metric that quantifies information…

Age of Information (AoI) measures the freshness of the information at a remote location. AoI reflects the time that is elapsed since the generation of the packet by a transmitter. In this paper, we consider a remote monitoring problem…

Networking and Internet Architecture · Computer Science 2019-05-14 Anis Elgabli , Hamza Khan , Mounssif Krouka , Mehdi Bennis

For status update systems operating over unreliable energy-constrained wireless channels, we address Weaver's long-standing Level-C question: do my packets actually improve the plant's behavior? Each fresh sample carries a stochastic…

Systems and Control · Electrical Eng. & Systems 2026-03-31 Youssef Ahmed , Arnob Ghosh , Chih-Chun Wang , Ness B. Shroff

Timely sampling and fresh information delivery are important in 6G communications. This is achieved by encoding samples into short packets/codewords for transmission, with potential decoding errors. We consider a broadcasting base station…

Information Theory · Computer Science 2023-09-13 Sumanth S Raikar , Rajshekhar V Bhat

Connected and autonomous vehicles (CAVs) rely heavily upon time-sensitive information update services to ensure the safety of people and assets, and satisfactory entertainment applications. Therefore, the freshness of information is a…

Systems and Control · Electrical Eng. & Systems 2024-03-15 Anik Mallik , Dawei Chen , Kyungtae Han , Jiang Xie , Zhu Han

The age of information (AoI) has become a central measure of data freshness in modern wireless systems, yet existing surveys either focus on classical AoI formulations or provide broad discussions of reinforcement learning (RL) in wireless…

Machine Learning · Computer Science 2025-12-29 Alimu Alibotaiken , Suyang Wang , Oluwaseun T. Ajayi , Yu Cheng

In this paper, we study a real-time monitoring system in which multiple source nodes are responsible for sending update packets to a common destination node in order to maintain the freshness of information at the destination. Since it may…

Information Theory · Computer Science 2019-08-20 Mohamed A. Abd-Elmagid , Harpreet S. Dhillon , Nikolaos Pappas

In this paper, we introduce a new data freshness metric, relative Age of Information (rAoI), and examine it in a single server system with various packet management schemes. The (classical) AoI metric was introduced to measure the staleness…

Information Theory · Computer Science 2019-07-02 Peng Zou , Omur Ozel , Suresh Subramaniam

Using environmental sensory data can enhance communications beam training and reduce its overhead compared to conventional methods. However, the availability of fresh sensory data during inference may be limited due to sensing constraints…

Signal Processing · Electrical Eng. & Systems 2025-11-04 Abolfazl Zakeri , Nhan Thanh Nguyen , Ahmed Alkhateeb , Markku Juntti

Age of information (AoI) measures information freshness at the receiver. AoI may provide insights into quality of service in communication systems. For this reason, it has been used as a cross-layer metric for wireless communication…

Systems and Control · Electrical Eng. & Systems 2020-05-06 Onur Ayan , H. Murat Gürsu , Sandra Hirche , Wolfgang Kellerer

Timely and efficient dissemination of service information is critical in compute-first networking systems, where user requests arrive dynamically and computing resources are constrained. In such systems, the access point (AP) plays a key…

Networking and Internet Architecture · Computer Science 2025-05-12 Jianpeng Qi , Chao Liu , Chengxiang Xu , Rui Wang , Junyu Dong , Yanwei Yu

This paper considers utilizing the knowledge of age gains to reduce the network average age of information (AoI) in random access with event-driven periodic updating for the first time. Built on the form of slotted ALOHA, we require each…

Information Theory · Computer Science 2024-07-01 Yuqing Zhu , Yiwen Zhu , Aoyu Gong , Yan Lin , Yuan-Hsuan Lo , Yijin Zhang

Deep neural networks (DNNs) have showcased remarkable performance across various tasks and are widely deployed on AI accelerators fabricated in advanced technology nodes for efficiency. As aging effects become more pronounced, timing and…

Hardware Architecture · Computer Science 2026-04-14 Tong Xie , Zuodong Zhang , Chao Yang , Yuan Wang , Runsheng Wang , Meng Li

Age of information (AoI) is an effective performance metric measuring the freshness of information and is particularly suitable for applications involving status update. In this paper, using the age violation probability as the metric,…

Information Theory · Computer Science 2023-08-11 Kuan-Yu Lin , Yu-Chih Huang , Yu-Pin Hsu

Age of information (AoI) is a powerful metric to evaluate the freshness of information, where minimization of average statistics, such as the average AoI and average peak AoI, currently prevails in guiding freshness optimization for related…

Information Theory · Computer Science 2023-11-29 Yuquan Xiao , Qinghe Du
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