Show simple item record

dc.contributor.authorTalak, Rajat Rajendra
dc.contributor.authorKaraman, Sertac
dc.contributor.authorModiano, Eytan H
dc.date.accessioned2021-05-12T19:08:37Z
dc.date.available2021-05-12T19:08:37Z
dc.date.issued2020-08
dc.identifier.issn1063-6692
dc.identifier.issn1558-2566
dc.identifier.urihttps://hdl.handle.net/1721.1/130580
dc.description.abstractAge of information (AoI), defined as the time that elapsed since the last received update was generated, is a newly proposed metric to measure the timeliness of information updates in a network. We consider AoI minimization problem for a network with general interference constraints, and time varying channels. We propose two policies, namely, virtual-queue based policy and age-based policy when the channel state is available to the network scheduler at each time step. We prove that the virtual-queue based policy is nearly optimal, up to a constant additive factor, and the age-based policy is at-most a factor of 4 away from optimality. Comparison with previous work, which derived age optimal policies when channel state information is not available to the scheduler, demonstrates significant improvement in age due to the availability of channel state information. Our analysis relies on the age conservation law and age-square conservation law developed in this paper, which hold more generally and may be of independent interest.en_US
dc.description.sponsorshipNSF (Grants AST-1547331, CNS-1713725, and CNS-1701964)en_US
dc.description.sponsorshipArmy Research Office (Grant W911NF-17-1-0508)en_US
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/tnet.2020.2996237en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourceProf. Karaman via Barbara Williamsen_US
dc.titleImproving Age of Information in Wireless Networks With Perfect Channel State Informationen_US
dc.typeArticleen_US
dc.identifier.citationTalak, Rajat et al. "Improving Age of Information in Wireless Networks With Perfect Channel State Information." IEEE/ACM Transactions on Networking 28, 4 (August 2020): 1765-1778. © 2020 IEEEen_US
dc.contributor.departmentMassachusetts Institute of Technology. Laboratory for Information and Decision Systemsen_US
dc.relation.journalIEEE/ACM Transactions on Networkingen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2021-05-11T18:24:56Z
dspace.orderedauthorsTalak, R; Karaman, S; Modiano, Een_US
dspace.date.submission2021-05-11T18:24:58Z
mit.journal.volume28en_US
mit.journal.issue4en_US
mit.licenseOPEN_ACCESS_POLICY


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record