Asymmetric ACK/NACK Detection for Ultra-Reliable Low-Latency Communications

Hamidreza Shariatmadari, Ruifeng Duan, Sassan Iraji, Riku Jantti, Zexian Li, Mikko A. Uusitalo

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

7 Citations (Scopus)
234 Downloads (Pure)


The fifth generation wireless systems are expected to encounter new services in order to provide connectivity for a wide range of applications. One of the considered services is ultra-reliable low-latency communications (URLLC), which has stringent requirements on availability, reliability, and latency. The communication efficiency of URLLC can be improved by employing error control protocols, such as automatic repeat request (ARQ) and hybrid ARQ (HARQ). However, this requires a reliable feedback channel to carry acknowledgement (ACK) and negative ACK (NACK) signals. Improving the detection reliability of ACK and NACK signals simultaneously entails allocating more resources for the feedback channel. Instead, we propose employing an asymmetric signal detection to provide a better protection for NACK signals compared to the ACK signals, without assigning more resources to the feedback channel. The simulation results show that the asymmetric signal detection can achieve a better resource utilization for URLLC.

Original languageEnglish
Title of host publication2018 European Conference on Networks and Communications, EuCNC 2018
Place of PublicationUnited States
Number of pages5
ISBN (Electronic)978-1-5386-1478-5
ISBN (Print)978-1-5386-1479-2
Publication statusPublished - 20 Aug 2018
MoE publication typeA4 Conference publication
EventEuropean Conference on Networks and Communications - Ljubljana, Slovenia
Duration: 18 Jun 201821 Jun 2018

Publication series

NameEuropean Conference on Networks and Communications
ISSN (Electronic)2575-4912


ConferenceEuropean Conference on Networks and Communications
Abbreviated titleEuCNC


  • 5G
  • control channel
  • feedback
  • M2M
  • MTC
  • resource allocations
  • ultra-reliable low-latency communications


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