This paper reviews the potential channel decoding techniques for ultra-reliable low-latency communications (URLLC). URLLC is renowned for its stringent requirements including ultra-reliability, low end-to-end transmission latency, and packet-size flexibility. These requirements exacerbate the difficulty of the physical-layer design, particularly for the channel coding and decoding schemes. To satisfy the requirements of URLLC, decoders must exhibit superior error-rate performance \black{and} low decoding complexity. \black{Also, it is desired that decoders be universal} to accommodate various coding schemes. This paper provides a comprehensive review and comparison of different candidate decoding techniques for URLLC in terms of their error-rate performance and computational complexity for structured and random short codes. We further make recommendations of the decoder selections and suggest several potential research directions.

翻译：本文回顾了超可靠低延迟通信的潜在解码技术(URLLC)。URLC以其严格的要求而著称,包括超可靠性、低端至终端传输延迟度和包尺寸灵活性。这些要求加剧了物理层设计的困难,特别是频道编码和解码计划。为满足URLC的要求,解码器必须表现出较高的错误率性能\black{和}低解码复杂性。 \black{Alsoso,希望解码器普遍适用,以适应各种编码计划。本文全面审查和比较了URLC的各种候选解码技术的错误率性能和结构化及随机短码的计算复杂性。我们进一步提出解码器选择的建议,并提出若干潜在的研究方向。