Experimental evaluation of flexible duplexing in multi-tier MIMO networks

In this paper, we present an experimental evaluation of the performance benefits provided by flexible duplexing, an access technique that allows uplink and downlink cells to coexist within the same time-frequency resource blocks. In order to replicate a wireless multi-tier network composed of 1 macr...

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Autores: Fanjul Fernández, Jacobo, Fernández Díaz, Renzo Daniel, Ibáñez Díaz, Jesús María|||0000-0003-1275-8073, García Naya, José Antonio, Santamaría Caballero, Luis Ignacio|||0000-0003-0040-7436
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/19393
Acceso en línea:http://hdl.handle.net/10902/19393
Access Level:acceso abierto
Palabra clave:Flexible duplexing
Heterogeneous networks
Interference alignment
OFDM
MIMO testbed
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spelling Experimental evaluation of flexible duplexing in multi-tier MIMO networksFanjul Fernández, JacoboFernández Díaz, Renzo DanielIbáñez Díaz, Jesús María|||0000-0003-1275-8073García Naya, José AntonioSantamaría Caballero, Luis Ignacio|||0000-0003-0040-7436Flexible duplexingHeterogeneous networksInterference alignmentOFDMMIMO testbedIn this paper, we present an experimental evaluation of the performance benefits provided by flexible duplexing, an access technique that allows uplink and downlink cells to coexist within the same time-frequency resource blocks. In order to replicate a wireless multi-tier network composed of 1 macro-cell and 2 small cells, a measurement campaign has been conducted using an indoor wireless testbed comprised of a total of 6 multiple-input multiple-output (MIMO) software-defined radio (SDR) devices. Since each cell has a single active user, each uplink/downlink configuration can be identified with a different interference channel, over which interference alignment (IA) is used as an inter-cell interference management technique and compared to other existing methods. The obtained results show that flexible duplexing clearly outperforms the conventional time-division duplex (TDD) access approach, where all cells operate synchronized either in uplink or dowlink mode. Additionally, interference alignment consistently provides better results in most of the interference regimes when compared to minimum means quare error (MMSE)-based schemes. The impact of channel estimate quality on the different communication strategies is also studied. It is worth highlighting that the presented over-the-air (OTA) experiments represent the first implementation of IA with real-time precoding and decoding.The work of Jacobo Fanjul, Jesús Ibáñez and Ignacio Santamaria has been supported by the Ministerio de Economía, Industria y Competitividad (MINECO) of Spain, and AEI/FEDER funds of the E.U., under grant TEC2016-75067-C4-4-R (CARMEN), grant PID2019-104958RB-C43 (ADELE), and FPI grant BES-2014-069786. The work of José A. García-Naya has been funded by the Xunta de Galicia (ED431G2019/01), the Agencia Estatal de Investigación of Spain (TEC2016-75067-C4-1-R, RED2018-102668-T), and ERDF funds of the E.U. (AEI/FEDER, UE).SpringerOpenUniversidad de Cantabria20202020-09-24journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/19393EURASIP Journal on Wireless Communications and Networking, 2020, 2020:186reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/193932026-06-02T12:39:31Z
dc.title.none.fl_str_mv Experimental evaluation of flexible duplexing in multi-tier MIMO networks
title Experimental evaluation of flexible duplexing in multi-tier MIMO networks
spellingShingle Experimental evaluation of flexible duplexing in multi-tier MIMO networks
Fanjul Fernández, Jacobo
Flexible duplexing
Heterogeneous networks
Interference alignment
OFDM
MIMO testbed
title_short Experimental evaluation of flexible duplexing in multi-tier MIMO networks
title_full Experimental evaluation of flexible duplexing in multi-tier MIMO networks
title_fullStr Experimental evaluation of flexible duplexing in multi-tier MIMO networks
title_full_unstemmed Experimental evaluation of flexible duplexing in multi-tier MIMO networks
title_sort Experimental evaluation of flexible duplexing in multi-tier MIMO networks
dc.creator.none.fl_str_mv Fanjul Fernández, Jacobo
Fernández Díaz, Renzo Daniel
Ibáñez Díaz, Jesús María|||0000-0003-1275-8073
García Naya, José Antonio
Santamaría Caballero, Luis Ignacio|||0000-0003-0040-7436
author Fanjul Fernández, Jacobo
author_facet Fanjul Fernández, Jacobo
Fernández Díaz, Renzo Daniel
Ibáñez Díaz, Jesús María|||0000-0003-1275-8073
García Naya, José Antonio
Santamaría Caballero, Luis Ignacio|||0000-0003-0040-7436
author_role author
author2 Fernández Díaz, Renzo Daniel
Ibáñez Díaz, Jesús María|||0000-0003-1275-8073
García Naya, José Antonio
Santamaría Caballero, Luis Ignacio|||0000-0003-0040-7436
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Flexible duplexing
Heterogeneous networks
Interference alignment
OFDM
MIMO testbed
topic Flexible duplexing
Heterogeneous networks
Interference alignment
OFDM
MIMO testbed
description In this paper, we present an experimental evaluation of the performance benefits provided by flexible duplexing, an access technique that allows uplink and downlink cells to coexist within the same time-frequency resource blocks. In order to replicate a wireless multi-tier network composed of 1 macro-cell and 2 small cells, a measurement campaign has been conducted using an indoor wireless testbed comprised of a total of 6 multiple-input multiple-output (MIMO) software-defined radio (SDR) devices. Since each cell has a single active user, each uplink/downlink configuration can be identified with a different interference channel, over which interference alignment (IA) is used as an inter-cell interference management technique and compared to other existing methods. The obtained results show that flexible duplexing clearly outperforms the conventional time-division duplex (TDD) access approach, where all cells operate synchronized either in uplink or dowlink mode. Additionally, interference alignment consistently provides better results in most of the interference regimes when compared to minimum means quare error (MMSE)-based schemes. The impact of channel estimate quality on the different communication strategies is also studied. It is worth highlighting that the presented over-the-air (OTA) experiments represent the first implementation of IA with real-time precoding and decoding.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-09-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/19393
url http://hdl.handle.net/10902/19393
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv SpringerOpen
publisher.none.fl_str_mv SpringerOpen
dc.source.none.fl_str_mv EURASIP Journal on Wireless Communications and Networking, 2020, 2020:186
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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