Freshness on Demand: Optimizing Age of Information for the Query Process

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

Age of Information (AoI) has become an important concept in communications, as it allows system designers to measure the freshness of the information available to remote monitoring or control processes. However, its definition tacitly assumes that new information is used at any time, which is not always the case. Instead instants at which information is collected and used are dependent on a certain query process. We propose a model that accounts for the discrete time nature of many monitoring processes, by considering a pull-based communication model in which the freshness of information is only important when the receiver generates a query. We then define the Age of Information at Query (QAoI), a more general metric that fits the pull-based scenario, and show how its optimization can lead to very different choices from traditional push-based AoI optimization when using a Packet Erasure Channel (PEC).

Original languageEnglish
Title of host publicationICC 2021 - IEEE International Conference on Communications
Number of pages6
PublisherIEEE
Publication date23 Jun 2021
Pages1-6
ISBN (Print)978-1-7281-7123-4
ISBN (Electronic)978-1-7281-7122-7
DOIs
Publication statusPublished - 23 Jun 2021
Event2021 IEEE International Conference on Communications Workshops (ICC Workshops) - Montreal, Canada
Duration: 14 Jun 202123 Jun 2021

Conference

Conference2021 IEEE International Conference on Communications Workshops (ICC Workshops)
Country/TerritoryCanada
CityMontreal
Period14/06/202123/06/2021
SeriesI E E E International Conference on Communications
ISSN1550-3607

Keywords

  • Age of Information
  • networked control systems

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