Low-Complexity Buffer-Aided Link Selection with Outdated CSI and Feedback Errors

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorNomikos, Nikolaosen_US
dc.contributor.authorCharalambous, Themistoklisen_US
dc.contributor.authorVouyioukas, Demosthenesen_US
dc.contributor.authorKaragiannidis, George K.en_US
dc.contributor.departmentDepartment of Electrical Engineering and Automationen
dc.contributor.groupauthorDistributed and Networked Control Systemsen
dc.contributor.organizationUniversity of the Aegeanen_US
dc.contributor.organizationAristotle University of Thessalonikien_US
dc.date.accessioned2019-01-30T15:07:58Z
dc.date.available2019-01-30T15:07:58Z
dc.date.issued2018-08en_US
dc.description.abstractBuffer-aided relays can improve the diversity of multi-hop networks, however, they increase packet delays. Thus, various delay-aware protocols have been developed, but without considering the transmission diversity. Moreover, most works adopt ideal assumptions, such as symmetric links, perfect Channel State Information (CSI) and error-free feedback channels. So, we propose a Low-Complexity (LoCo) link selection algorithm, herein called LoCo - Link. The proposed algorithm may experience delays during CSI updates, and hence, by using outdated CSI its performance may deteriorate. To alleviate this issue, we next propose a distributed version of LoCo - Link (d - LoCo - Link) dealing with outdated CSI. In both algorithms, the source performs broadcasting towards multiple relays; when the packets are transmitted by a relay to the destination, they are discarded from all other relays. This coordination relies on feedback channels. For non error-free feedback channels, we propose a scheme in which the relays listen to the transmission of the best relay and drop duplicate packets. Results show that LoCo - Link surpasses other algorithms, by decreasing the delay in asymmetric networks. Moreover, d - LoCo - Link avoids diversity losses due to outdated CSI, while the effect of non error-free feedback channels is mitigated by taking advantage of the inter-relay channels.en
dc.description.versionPeer revieweden
dc.format.extent13
dc.format.extent3694 - 3706
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationNomikos, N, Charalambous, T, Vouyioukas, D & Karagiannidis, G K 2018, ' Low-Complexity Buffer-Aided Link Selection with Outdated CSI and Feedback Errors ', IEEE Transactions on Communications, vol. 66, no. 8, pp. 3694 - 3706 . https://doi.org/10.1109/TCOMM.2018.2821143en
dc.identifier.doi10.1109/TCOMM.2018.2821143en_US
dc.identifier.issn0090-6778
dc.identifier.issn1558-0857
dc.identifier.otherPURE UUID: 3752eb9f-a511-4caf-9a1b-32f724814992en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/3752eb9f-a511-4caf-9a1b-32f724814992en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85044716375&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/26026259/ELEC_nomikos_et_al_Low_complexity_ieee.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/36237
dc.identifier.urnURN:NBN:fi:aalto-201901301407
dc.language.isoenen
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartofseriesIEEE Transactions on Communicationsen
dc.relation.ispartofseriesVolume 66, issue 8en
dc.rightsopenAccessen
dc.subject.keywordasymmetric linksen_US
dc.subject.keywordBroadcastingen_US
dc.subject.keywordbuffer-aided relayingen_US
dc.subject.keyworddelayen_US
dc.subject.keywordDelaysen_US
dc.subject.keyworddiversityen_US
dc.subject.keywordDiversity receptionen_US
dc.subject.keywordlow-complexityen_US
dc.subject.keywordMarkov chainsen_US
dc.subject.keywordnon error-free feedbacken_US
dc.subject.keywordoutdated CSIen_US
dc.subject.keywordProtocolsen_US
dc.subject.keywordRelay networks (telecommunications)en_US
dc.subject.keywordRelay selectionen_US
dc.subject.keywordSignal to noise ratioen_US
dc.titleLow-Complexity Buffer-Aided Link Selection with Outdated CSI and Feedback Errorsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionacceptedVersion
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