Load balancing in hybrid VLC and RF networks based on blind interference alignment

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dc.contributor.author Qidan, Ahmad Adnan
dc.contributor.author Morales Céspedes, Máximo
dc.contributor.author García-Armada, Ana
dc.date.accessioned 2021-05-24T11:01:08Z
dc.date.available 2021-05-24T11:01:08Z
dc.date.issued 2020-04-13
dc.identifier.bibliographicCitation IEEE Access, 8, April 2021, Pp. 72512-72527
dc.identifier.issn 2169-3536
dc.identifier.uri http://hdl.handle.net/10016/32729
dc.description.abstract Visible light communications (VLC) are proposed for increasing the spectral efficiency and the number of devices served in indoor environments, while providing illumination through light emitting diodes (LED). For VLC, each optical access point (AP) provides a small and confined area of coverage. Since several sources of light are usually deployed in overlapping fashion in order to provide satisfactory illumination, VLC are limited by inter-cell interference. Moreover, transmission from a specific optical AP can be blocked by the elements of the scenario. On the other hand, radio-frequency (RF) systems such as WiFi are usually available in most of the indoor scenarios. In this work, we first propose a dynamic cell formation method for grouping the optical APs in multiple optical cells that cover a footprint each minimizing the inter-cell interference. After that, we use transmission based on blind interference alignment (BIA) in each optical cell. Considering the coexistence with RF systems based on orthogonal frequency division multiplexing (OFDM), a load balancing algorithm is proposed for managing the resources of the resulting hybrid VLC/RF network and determining the user association to each system. However, the complexity of this optimization problem is excessively high for practical VLC/RF networks. In order to obtain a suboptimal but tractable solution, we propose a decentralized optimization method based on Lagrangian multipliers. Simulation results show that the proposed scheme outperforms other approaches for user grouping and managing the resources of hybrid VLC/RF networks.
dc.description.sponsorship This work was supported in part by the Spanish National Project TERESA-ADA under Grant TEC2017-90093-C3-2-R and Grant MINECO/AEI/FEDER, UE, and in part by the research project GEOVEOLUZ-CM-UC3M funded by the call Programa de apoyo a la realización de proyectos interdisciplinares de I+D para jóvenes investigadores de la Universidad Carlos III de Madrid 2019-2020 under the frame of the Convenio Plurianual Comunidad de Madrid, Universidad Carlos III de Madrid
dc.format.extent 16
dc.language.iso eng
dc.publisher IEEE
dc.rights This work is licensed under a Creative Commons Attribution 4.0 License.
dc.rights Atribución 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by/3.0/es/
dc.subject.other Visible light communications
dc.subject.other Blind interference alignment
dc.subject.other User-centric
dc.subject.other Hybrid network
dc.subject.other Load balancing
dc.title Load balancing in hybrid VLC and RF networks based on blind interference alignment
dc.type article
dc.subject.eciencia Electrónica
dc.subject.eciencia Telecomunicaciones
dc.identifier.doi https://doi.org/10.1109/ACCESS.2020.2987545
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. TEC2017-90093-C3-2-R
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 72512
dc.identifier.publicationlastpage 72527
dc.identifier.publicationtitle IEEE Access
dc.identifier.publicationvolume 8
dc.identifier.uxxi AR/0000025244
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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