Variable-rate incremental-redundancy HARQ for finite blocklengths

Incremental redundancy (IR) hybrid automatic repeat request (HARQ) is a staple component of modern wireless systems, instrumental for efficient and reliable low-latency communication. To further improve the performance, the blocklengths - and therefore the incremental rates - of the various transmis...

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Detalles Bibliográficos
Autores: Fu, Yu, Lozano Solsona, Angel, Yang, Hongwen
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Universitat Pompeu Fabra
Repositorio:Repositorio Digital de la UPF
OAI Identifier:oai:dnet:rdupf_______::fca396d8eaac155b8a626d9900fd7a08
Acceso en línea:https://hdl.handle.net/10230/73316
http://dx.doi.org/10.1109/OJCOMS.2025.3541238
Access Level:acceso abierto
Palabra clave:Blocklength allocation
Finite blocklength
Hybrid automatic repeat request
Incremental redundancy
Throughput
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spelling Variable-rate incremental-redundancy HARQ for finite blocklengthsFu, YuLozano Solsona, AngelYang, HongwenBlocklength allocationFinite blocklengthHybrid automatic repeat requestIncremental redundancyThroughputIncremental redundancy (IR) hybrid automatic repeat request (HARQ) is a staple component of modern wireless systems, instrumental for efficient and reliable low-latency communication. To further improve the performance, the blocklengths - and therefore the incremental rates - of the various transmissions can be released from being fixed. This paper optimizes these variable blocklengths in truncated IR-HARQ, with the goal of maximizing the overall throughput at any desired operating point (meaning any combination of signal-to-noise ratio and target error rate). The optimization relies on a finite-blocklength information-theoretical analysis, whereby the block error rate emerges as a function of the channel capacity and the channel dispersion. Numerical results confirm that the optimized variable-rate IR-HARQ significantly outperforms its fixed-rate counterpart, both with ideal codes and with a 5G commercial code. Additionally, a heuristic scheme that mimics the behavior of the optimized solution, but is simpler to implement, is set forth and shown to essentially attain the same performance.This work was supported in part by the China Scholarship Council; in part by MICIU under Grant PID2021-123999OB-I00 and Grant CEX2021-001195-M; in part by ICREA; and in part by the 5G Evolution Wireless Air Interface Intelligent R&D and Verification Public Platform Project under Grant 2022-229-220.Institute of Electrical and Electronics Engineers (IEEE)2026202620252026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/10230/73316http://dx.doi.org/10.1109/OJCOMS.2025.3541238reponame:Repositorio Digital de la UPFinstname:Universitat Pompeu FabraInglésIEEE Open Journal of the Communications Society. 2025;6:1413-22info:eu-repo/grantAgreement/ES/2PE/PID2021-123999OB-I00© 2025 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. For more information, see https://creativecommons.org/licenses/by-nc-nd/4.0/.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:dnet:rdupf_______::fca396d8eaac155b8a626d9900fd7a082026-06-12T07:21:37Z
dc.title.none.fl_str_mv Variable-rate incremental-redundancy HARQ for finite blocklengths
title Variable-rate incremental-redundancy HARQ for finite blocklengths
spellingShingle Variable-rate incremental-redundancy HARQ for finite blocklengths
Fu, Yu
Blocklength allocation
Finite blocklength
Hybrid automatic repeat request
Incremental redundancy
Throughput
title_short Variable-rate incremental-redundancy HARQ for finite blocklengths
title_full Variable-rate incremental-redundancy HARQ for finite blocklengths
title_fullStr Variable-rate incremental-redundancy HARQ for finite blocklengths
title_full_unstemmed Variable-rate incremental-redundancy HARQ for finite blocklengths
title_sort Variable-rate incremental-redundancy HARQ for finite blocklengths
dc.creator.none.fl_str_mv Fu, Yu
Lozano Solsona, Angel
Yang, Hongwen
author Fu, Yu
author_facet Fu, Yu
Lozano Solsona, Angel
Yang, Hongwen
author_role author
author2 Lozano Solsona, Angel
Yang, Hongwen
author2_role author
author
dc.subject.none.fl_str_mv Blocklength allocation
Finite blocklength
Hybrid automatic repeat request
Incremental redundancy
Throughput
topic Blocklength allocation
Finite blocklength
Hybrid automatic repeat request
Incremental redundancy
Throughput
description Incremental redundancy (IR) hybrid automatic repeat request (HARQ) is a staple component of modern wireless systems, instrumental for efficient and reliable low-latency communication. To further improve the performance, the blocklengths - and therefore the incremental rates - of the various transmissions can be released from being fixed. This paper optimizes these variable blocklengths in truncated IR-HARQ, with the goal of maximizing the overall throughput at any desired operating point (meaning any combination of signal-to-noise ratio and target error rate). The optimization relies on a finite-blocklength information-theoretical analysis, whereby the block error rate emerges as a function of the channel capacity and the channel dispersion. Numerical results confirm that the optimized variable-rate IR-HARQ significantly outperforms its fixed-rate counterpart, both with ideal codes and with a 5G commercial code. Additionally, a heuristic scheme that mimics the behavior of the optimized solution, but is simpler to implement, is set forth and shown to essentially attain the same performance.
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/10230/73316
http://dx.doi.org/10.1109/OJCOMS.2025.3541238
url https://hdl.handle.net/10230/73316
http://dx.doi.org/10.1109/OJCOMS.2025.3541238
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv IEEE Open Journal of the Communications Society. 2025;6:1413-22
info:eu-repo/grantAgreement/ES/2PE/PID2021-123999OB-I00
dc.rights.none.fl_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
dc.source.none.fl_str_mv reponame:Repositorio Digital de la UPF
instname:Universitat Pompeu Fabra
instname_str Universitat Pompeu Fabra
reponame_str Repositorio Digital de la UPF
collection Repositorio Digital de la UPF
repository.name.fl_str_mv
repository.mail.fl_str_mv
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