Minimizing AoI under Covertness Constraints in Internet of Things Networks

Danyang Wang, Huimin Qin, Zan Li, Peihan Qi, Ning Zhang, Xianfu Chen, Keping Yu

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Covertly collecting the latest status information is great crucial for the controller to make decision in Internet of Things (IoT) networks. In this paper, age of information (AoI) is leveraged to evaluate the information freshness. To improve the information freshness, packet re-transmission is exploited at the transmitter, while the re-transmission increases the probability that the transmission behavior is being detected by the adversaries. Hence, we propose a time constrained re-transmission strategy to make a trade-off between the AoI and transmission covertness. Specifically, the maximum allowable re-transmission times have different effects on the AoI and transmission covertness. We formulate an optimization problem to minimize AoI under the constraint of system covertness. The closed-form expression of the average AoI and the expected probability of error detection are derived. Then, the number of maximum re-transmission time slots is optimized to minimize the average AoI. Finally, numerical results demonstrate that the optimal choice of the re-transmission times is the upper bound value of the consecutive transmission time slots that satisfies the covertness constraint. Proposed retransmission strategy can guarantee the information freshness under a given covertness constraint.
Original languageEnglish
Title of host publication2021 IEEE 3rd International Conference on Frontiers Technology of Information and Computer (ICFTIC)
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages694-700
ISBN (Electronic)978-1-6654-0605-5, 978-1-6654-0604-8
ISBN (Print)978-1-6654-0606-2
DOIs
Publication statusPublished - 12 Nov 2021
MoE publication typeA4 Article in a conference publication
EventIEEE 3rd International Conference on Frontiers Technology of Information and Computer, ICFTIC 2021 - Greenville, SC, USA
Duration: 12 Nov 202114 Nov 2021

Conference

ConferenceIEEE 3rd International Conference on Frontiers Technology of Information and Computer, ICFTIC 2021
Period12/11/2114/11/21

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