Effective age of information in real-time wireless feedback control systems

Chang, B., Kizilkaya, B. , Li, L., Zhao, G. , Chen, Z. and Imran, M. A. (2021) Effective age of information in real-time wireless feedback control systems. Science China Information Sciences, 64(2), 120303. (doi: 10.1007/s11432-020-3090-5)

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Abstract

Ultra-reliable and low-latency communication (URLLC) is one of the most important scenarios in forthcoming fifth generation (5G) cellular networks to ensure timely exchange of information and realize real-time wireless control. In URLLC, timely information update needs to be guaranteed since control performance, e.g., control cost and stability, is directly determined by timely control information update. In this paper, we introduce an effective age of information (EAoI) to evaluate the timeliness of information update in control process. We consider the control process with two phases: sensor to controller phase and controller to actuator phase. We adopt FGFS M/M/1/1 → M/M/1/2 and FGFS M/M/1/1* → M/M/1/2* tandem queuing models to represent control process and we use finite-state Markov Chains to describe control information updates. By studying state transitions, we calculate the average EAoI for both tandem queuing models. More importantly, we analyze throughput of wireless control systems and its relationship with average EAoI, which provides a guideline for URLLC system design in real-time feedback control systems. Simulation results show the advantage of using EAoI.

Item Type:Articles
Additional Information:This work was supported in part by National Natural Science Foundation of China (Grant No. 61631004).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad and Li, Dr Liying and Chang, Bo and Zhao, Dr Guodong and KIZILKAYA, BURAK
Authors: Chang, B., Kizilkaya, B., Li, L., Zhao, G., Chen, Z., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Science China Information Sciences
Publisher:Springer
ISSN:1674-733X
ISSN (Online):1869-1919
Published Online:20 January 2021
Copyright Holders:Copyright © 2021 Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature
First Published:First published in Science China Information Sciences 64(2): 120303
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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