A Survey of Key Techniques in Ordered Statistics Decoding (OSD) for Ultra-Reliable Low-Latency Communications

WANG Qianfan; GUO Yangeng; BI Sheng; WANG Yiwen; SONG Linqi; MA Xiao

doi:10.12263/DZXB.20251062

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A Survey of Key Techniques in Ordered Statistics Decoding (OSD) for Ultra-Reliable Low-Latency Communications

SURVEY AND REVIEW | 更新时间：2026-06-04

- A Survey of Key Techniques in Ordered Statistics Decoding (OSD) for Ultra-Reliable Low-Latency Communications
- ACTA ELECTRONICA SINICA Vol. 54, Issue 1, Pages: 466-478(2026)
- 作者机构：
  
  1.香港城市大学，香港 999077
  2.中山大学计算机学院，广东广州 510006
  3.华南理工大学，广东广州 510006
  4.香港城市大学深圳研究院，广东深圳 518000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of china(62301617;62471506;62371411);Guangdong Basic and Applied Basic Research Foundation(2025A1515011650);Young Talent Support Project of Guangzhou Association for Scienceand Technology(QT-2025-048);the Guangdong Provincial Quantum Science Strategic Initiative(GDZX2503001);Hong Kong SAR Research Grants Council’s General Research Fund(11217823)
- DOI：10.12263/DZXB.20251062
  CLC： TN911.22;TP301.6
- Received：16 December 2025，
  
  Accepted：13 January 2026，
  
  Published：25 January 2026
- 稿件说明：
移动端阅览
王千帆, 郭延庚, 毕胜, 等. 面向高可靠低时延通信的顺序统计译码（OSD）关键技术综述[J]. 电子学报, 2026, 54(01): 466-478.

WANG Qianfan, GUO Yangeng, BI Sheng, et al. A Survey of Key Techniques in Ordered Statistics Decoding (OSD) for Ultra-Reliable Low-Latency Communications[J]. Acta Electronica Sinica, 2026, 54(01): 466-478.
王千帆, 郭延庚, 毕胜, 等. 面向高可靠低时延通信的顺序统计译码（OSD）关键技术综述[J]. 电子学报, 2026, 54(01): 466-478. DOI：10.12263/DZXB.20251062

WANG Qianfan, GUO Yangeng, BI Sheng, et al. A Survey of Key Techniques in Ordered Statistics Decoding (OSD) for Ultra-Reliable Low-Latency Communications[J]. Acta Electronica Sinica, 2026, 54(01): 466-478. DOI：10.12263/DZXB.20251062

摘要

高可靠低时延通信（Ultra-Reliable Low-Latency Communication，URLLC）是5G的三大核心场景之一，其增强版本极高可靠极低时延通信（Hyper-Reliable Low-Latency Communication，HRLLC）场景也已成为6G六大场景之一。高可靠低时延类通信场景对传输时延与可靠性提出了极致要求，这为短码编译码技术带来了新的机遇与挑战。顺序统计译码（Ordered Statistics Decoding，OSD）是一种近似最大似然（Near-Maximum-Likelihood，Near-ML）译码性能的通用短码译码算法，其在该类场景中具有重要潜力，但过高的计算复杂度严重制约了OSD算法的实际应用。本文系统综述了OSD算法中测试错误模式（Test Error Pattern，TEP）在测试顺序、跳过机制与提前终止策略等方面的代表性成果和最新研究进展，并对未来潜在研究方向进行了总结展望。具体地，首先讨论了汉明重量顺序、软重量顺序及基于有序可靠位的逻辑重量顺序对译码性能与复杂度的影响，指出逻辑权重顺序可以获得可靠性和实现复杂度间的有效折中。其次，分类总结了几种跳过与终止机制，阐明其基本思想是通过动态软信息判断或概率决策来降低冗余重编码次数。进一步，重点探讨了基于软度量和基于额外校验的TEP生成、跳过、终止机制及其联合设计，表明此类方

法通过结构性约束与混合判断策略，在几乎不损失误帧率的前提下，将平均重编码次数降低1~2个数量级。数值结果显示，对于BCH（Bose-Chaudhuri-Hocquenghem）码

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10.15999985

2.87866688

，联合跳过机制在信噪比为

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6.01133299

2.37066650

处仅需十余次重编码，较原始OSD可减少超过

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5.84200001

2.28600001

的计算开销。最后，本文指出OSD在非二进制编码、时变信道适应性及硬件实现等方面仍面临挑战，尤其是对于码长更长的中码率区域，并展望了针对OSD算法的未来研究方向。

Abstract

Ultra-reliable low-latency communications (URLLC) is one of the three key scenarios in 5G

and its enhanced form

hyper-reliability low-latency communications (HRLLC)

has been proposed as one of the six typical scenarios for 6G. These services impose very stringent constraints on latency and reliability

presenting new opportunities and challenges for the coding and decoding of short-blocklength codes. Ordered statistics decoding (OSD) is a universal near-maximum-likelihood (Near-ML) decoding algorithm for short codes with strong potential in such scenarios

but its high computational complexity severely limits practical deployment. This paper surveys recent advances in OSD with a focus on the design of test error pattern (TEP)

including ordering rules

skipping mechanisms

and early termination strategies

and outlines future research directions. Specifically

we first examine Hamming-weight

soft-weight

and logical-weight TEP orderings

and show that logical-weight ordering achieves an effective balance between reliability and implementation complexity. We then review existing skipping and termination mechanisms

which exploit dynamic soft information or probabilistic decisions to avoid redundant re-encodings. Moreover

we concentrate on TEP generation

skipping

and termination schemes driven by soft metrics and additional parity checks

as well as their joint design. By combining structural constraints with hybrid decision strategies

such schemes can reduce the average number of re-encodings by one to two orders of magnitude with almost no loss in frame error rate. Simulation results show that

for the bose-chaudhuri-hocquenghem（BCH) code

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10.15999985

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a combined skipping mechanism requires only tens of re-encodings at an SNR of

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https://html.publish.testx.fzyun.io/rc-pub/api/common/picture?pictureId=109793605&type=

6.01133299

2.37066650

reducing the computational cost by more than

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5.84200001

2.28600001

compared to the original OSD algorithm. Finally

we discuss open challenges related to non-binary codes

time-varying channels

and hardware implementations for longer blocklengths and medium-rate codes

and outline several promising directions for future research.

关键词

Keywords

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WANG Xin-mei

Wang XinmeiDept.of Information Engineering

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