Computing-aided update for information freshness in the internet of things

Minghao Fang, Xijun Wang, Chao Xu, Howard H. Yang, Tony Q.S. Quek

研究成果: Conference contribution

3 引文 斯高帕斯(Scopus)

摘要

Age of information (AoI), a notion that measures the information freshness, is an important performance metric for real-time applications in Internet of Things (IoT). With the surge of computing resources at the IoT devices, it is possible to preprocess the information packets that contain the status update before sending them to the destination so as to lighten the transmission burden. However, the additional time and energy expenditure induced by computing also make the optimal updating a non-trivial problem. In this paper, we consider a real-time IoT monitoring system, where the computing-aided IoT device is capable of preprocessing the status update. A joint preprocessing and transmission policy is devised to minimize the average AoI at the destination and the energy consumption at the IoT device. Due to the difference in the processing rate and the transmission rate and the difference in the idle duration and the active duration, this problem is formulated as an average cost semi-Markov decision process (SMDP) and then transformed into a discrete-time Markov decision process (MDP). We show that the optimal policy is of threshold type with respect to the AoI. Equipped with this, a low-complexity relative policy iteration algorithm is proposed to obtain the optimal policy of the SMDP. Finally, simulation results demonstrate the optimal policy structure in different cases and show that the proposed policy outperforms two baseline policies.

原文English
主出版物標題IEEE INFOCOM 2021 - IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2021
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781665404433
DOIs
出版狀態Published - 2021 5月 10
事件2021 IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2021 - Virtual, Online
持續時間: 2021 5月 92021 5月 12

出版系列

名字IEEE INFOCOM 2021 - IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2021

Conference

Conference2021 IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2021
城市Virtual, Online
期間21-05-0921-05-12

All Science Journal Classification (ASJC) codes

  • 人工智慧
  • 電腦網路與通信
  • 硬體和架構
  • 資訊系統與管理
  • 安全、風險、可靠性和品質

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