Age of Information: An Introduction and Survey
| Autor: | D. Richard Brown, Sanjit K. Kaul, Eytan Modiano, Yin Sun, Sennur Ulukus, Roy D. Yates |
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| Rok vydání: | 2021 |
| Předmět: |
Networking and Internet Architecture (cs.NI)
FOS: Computer and information sciences Queueing theory Information Age Computer Networks and Communications Computer science Wireless network Computer Science - Information Theory Information Theory (cs.IT) Distributed computing Control (management) Cyber-physical system Complex system 020206 networking & telecommunications 02 engineering and technology Variety (cybernetics) Computer Science - Networking and Internet Architecture 0202 electrical engineering electronic engineering information engineering State (computer science) Electrical and Electronic Engineering |
| Zdroj: | IEEE Journal on Selected Areas in Communications. 39:1183-1210 |
| ISSN: | 1558-0008 0733-8716 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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