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dc.contributor.authorPapazafeiropoulos, Anastasios
dc.contributor.authorKourtessis, Pandelis
dc.contributor.authorRenzo, Marco Di
dc.contributor.authorSenior, John M.
dc.contributor.authorChatzinotas, Symeon
dc.date.accessioned2019-07-31T16:13:00Z
dc.date.available2019-07-31T16:13:00Z
dc.date.issued2019-04-01
dc.identifier.citationPapazafeiropoulos , A , Kourtessis , P , Renzo , M D , Senior , J M & Chatzinotas , S 2019 , ' SDN-enabled MIMO Heterogeneous Cooperative Networks with Flexible Cell Association ' , IEEE Transactions on Wireless Communications , vol. 18 , no. 4 , 8637958 , pp. 2037-2050 . https://doi.org/10.1109/TWC.2019.2896154
dc.identifier.issn1536-1276
dc.identifier.otherPURE: 16194589
dc.identifier.otherPURE UUID: 455175c4-f332-4a49-bbd1-39099726f43b
dc.identifier.otherArXiv: http://arxiv.org/abs/1901.04280v1
dc.identifier.otherScopus: 85064076220
dc.identifier.otherORCID: /0000-0003-1841-6461/work/62751642
dc.identifier.urihttp://hdl.handle.net/2299/21507
dc.descriptionAccepted in IEEE TWC
dc.description.abstractSmall-cell densification is a strategy enabling the offloading of users from macro base stations (MBSs), in order to alleviate their load and increase the coverage, especially, for cell-edge users. In parallel, as the network increases in density, the BS cooperation emerges as an efficient design method towards the demands for drastic improvement of the system performance against the detrimental overall interference. We, therefore, model and scrutinize a heterogeneous network (HetNet) of two tiers (macro and small cells) with multiple-antenna BSs serving a multitude of users, which differ with respect to their basic design parameters, e.g., the deployment density, the number of transmit antennas, and transmit power. In addition, the tiers are enhanced with cell association policies by introducing the concept of the association probability. Above this and motivated by the advantages of cooperation among BSs, the small base stations (SBSs) are enriched with this property in their design. The SBS cooperation allows shedding light into its impact on the cell selection rules in multi-antenna HetNets. Under these settings, software-defined networking (SDN) is introduced smoothly to play the leading role in the orchestration of the network. In particular, heavy operations such as the coordination and the cell association are undertaken by virtue of an SDN controller performing and managing efficiently the corresponding computations due to its centralized adaptability and dynamicity towards the enhancement and potential scalability of the network. In this context, we derive the coverage probability and the mean achievable rate. Not only we show the outperformance of BS cooperation over uncoordinated BSs, but we also demonstrate that the SBS cooperation enables the admittance of more users from the macro-cell BSs (MBSs). Furthermore, we show that by increasing the number of BS antennas, the system performance is improved as the metrics under study reveal. Moreover, we investigate the performance of different transmission techniques, and we identify the optimal bias in each case when SBSs cooperate. Finally, we depict that the SBS densification is beneficial until a specific density value since a further increase does not increase the coverage probability.en
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofIEEE Transactions on Wireless Communications
dc.subjectMulti-antenna heterogeneous networks
dc.subjectoffloading
dc.subjectsmall-cell cooperation
dc.subjectsoftware-defined networking
dc.subjectstochastic geometry
dc.subjectComputer Science Applications
dc.subjectElectrical and Electronic Engineering
dc.subjectApplied Mathematics
dc.titleSDN-enabled MIMO Heterogeneous Cooperative Networks with Flexible Cell Associationen
dc.contributor.institutionSchool of Engineering and Technology
dc.contributor.institutionCentre for Engineering Research
dc.contributor.institutionCommunications and Intelligent Systems
dc.contributor.institutionCentre for Computer Science and Informatics Research
dc.contributor.institutionOptical Networks
dc.contributor.institutionOffice of the Vice-Chancellor
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85064076220&partnerID=8YFLogxK
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1109/TWC.2019.2896154
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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