On the Role of Age of Information in the Internet of Things

By Mohamed A. Abd-Elmagid, Nikolaos Pappas, Harpreet S. Dhillon. IEEE Communications Magazine, 2018

358 citations recorded by the source corpus.

In this article, we provide an accessible introduction to the emerging idea of Age of Information (AoI) that quantifies freshness of information and explore its possible role in the efficient design of freshness-aware Internet of Things (IoT). We start by summarizing the concept of AoI and its variants with emphasis on the differences between AoI and other well-known performance metrics in the literature, such as throughput and delay. Building on this, we explore freshness-aware IoT design for a network in which IoT devices sense potentially different physical processes and are supposed to frequently update the status of these processes at a destination node (e.g., a cellular base station). Inspired by recent interest, we also assume that these IoT devices are powered by wireless energy transfer by the destination node. For this setting, we investigate the optimal sampling policy that jointly optimizes wireless energy transfer and scheduling of update packet transmissions from IoT devices with the goal of minimizing long-term weighted sum-AoI. Using this, we characterize the achievable AoI region. We also compare this AoI-optimal policy with the one that maximizes average throughput (throughput-optimal policy), and demonstrate the impact of system state on their structures. Several promising directions for future research are also presented.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering, Epidemiology

View Paper: https://www.semanticscholar.org/paper/9e13cc363eb2fe7a644d7164409bba8c3cef4dc7

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computer Networks and Communications

1. Mohammad Mahdi Azari
2. Björn E. Ottersten
3. Symeon Chatzinotas
4. Sofie Pollin

In Electrical and Electronic Engineering

1. Mohammad Mahdi Azari
2. Björn E. Ottersten
3. Symeon Chatzinotas
4. Sofie Pollin
5. Emil Björnson

Citations in the corpus

• Beyond Transmitting Bits: Context, Semantics, and Task-Oriented Communications (2022, neutral): “Interested readers are advised to refer to well-known books and overview articles on this topic, such as [282], [283], [284], and [285], for a”
• Evolution of Non-Terrestrial Networks From 5G to 6G: A Survey (2021, methodology): “1The classical definition of network delay has been recently augmented by the concept of Age of Information (AoI) [150].”