Impact of Imperfect Spectrum Sensing on Age of Information in Energy Harvesting Cognitive Radios

Shiyang Leng, Aylin Yener

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The metric age of information (AoI) has recently been widely employed to quantify the freshness of the information delivered to the destination. This paper investigates long-term average AoI minimization of an energy harvesting secondary user (SU) in a cognitive radio network setting. Specifically, the paper focuses on the impact of imperfect spectrum sensing on AoI minimization in this setting. The SU makes a decision whether to sense the presence of a primary user, and if it determines the spectrum to be unoccupied, may send out a status update. Sensing and updating both cost energy and the sensing decision may be incorrect due to imperfect spectrum sensing. This setting is formulated as an infinite horizon partially observable Markov decision process (POMDP) to derive the optimal policy that minimizes the long-term average AoI of the SU. The existence of the optimal stationary sensing and update policy is proved and the threshold structure of the policy is shown. Numerical results are presented to demonstrate the SU's AoI performance.

Original languageEnglish (US)
Title of host publication2019 IEEE International Conference on Communications, ICC 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538680889
DOIs
StatePublished - May 2019
Event2019 IEEE International Conference on Communications, ICC 2019 - Shanghai, China
Duration: May 20 2019May 24 2019

Publication series

NameIEEE International Conference on Communications
Volume2019-May
ISSN (Print)1550-3607

Conference

Conference2019 IEEE International Conference on Communications, ICC 2019
CountryChina
CityShanghai
Period5/20/195/24/19

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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    Leng, S., & Yener, A. (2019). Impact of Imperfect Spectrum Sensing on Age of Information in Energy Harvesting Cognitive Radios. In 2019 IEEE International Conference on Communications, ICC 2019 - Proceedings [8761911] (IEEE International Conference on Communications; Vol. 2019-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICC.2019.8761911