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Age of Information: An Introduction and Survey
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TLDR
The current state of the art in the design and optimization of low-latency cyberphysical systems and applications in which sources send time-stamped status updates to interested recipients is described and AoI timeliness metrics are described.Abstract:
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 send time-stamped status updates to interested recipients. These applications desire status updates at the recipients to be as timely as possible; however, this is typically constrained by limited system resources. We describe AoI timeliness metrics and present general methods of AoI evaluation analysis that are applicable to a wide variety of sources and systems. Starting from elementary single-server queues, we apply these AoI methods to a range of increasingly complex systems, including energy harvesting sensors transmitting over noisy channels, parallel server systems, queueing networks, and various single-hop and multi-hop wireless networks. We also explore how update age is related to MMSE methods of sampling, estimation and control of stochastic processes. The paper concludes with a review of efforts to employ age optimization in cyberphysical applications.read more
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Semantics-Empowered Communication for Networked Intelligent Systems.
TL;DR: This work envisions a communication paradigm shift, which makes the semantics of information the foundation of the communication process, and shows significant reduction in both reconstruction error and cost of actuation error, as well as in the number of uninformative samples generated.
Journal ArticleDOI
Beyond Transmitting Bits: Context, Semantics, and Task-Oriented Communications
Deniz Gunduz,Zhijin Qin,Inaki Estella Aguerri,Harpreet S. Dhillon,Zhaohui Yang,Aylin Yener,Kai-Kit Wong,Chan-Byoung Chae +7 more
TL;DR: This tutorial summarizes the efforts to date, starting from its early adaptations, semantic-aware and task-oriented communications, covering the foundations, algorithms and potential implementations, and focuses on approaches that utilize information theory to provide the foundations.
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Peak Age of Information Distribution for Edge Computing With Wireless Links
TL;DR: This work model the communication and computation delay of such a system as two First Come First Serve (FCFS) queues in tandem, analytically deriving the full distribution of the PAoI for the tandems, which can represent a wide variety of realistic scenarios.
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Optimizing Information Freshness using Low-Power Status Updates via Sleep-Wake Scheduling
TL;DR: In this paper, the authors considered the problem of optimizing the freshness of status updates that are sent from a large number of low-power source nodes to a common access point, and designed the sleep-wake parameters for minimizing the weighted-sum peak AoI of the sources, subject to per-source battery lifetime constraints.
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Semantic Communications for Future Internet: Fundamentals, Applications, and Challenges
Wan Qing Yang,Hongyang Du,Zi Qin Liew,Wei Yang Bryan Lim,Zehui Xiong,Dusit Niyato,Xuefen Chi,Xuemin Sherman Shen,Chunyan Miao +8 more
TL;DR: In this paper , the authors provide a holistic review of SemCom, its applications in 6G networks, and the existing challenges and open issues with insights for further in-depth investigations.
References
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