Next Article in Journal
Compression Helps Deep Learning in Image Classification
Next Article in Special Issue
Low-Latency Short-Packet Transmission over a Large Spatial Scale
Previous Article in Journal
Neural-Network Quantum States for Spin-1 Systems: Spin-Basis and Parameterization Effects on Compactness of Representations
Previous Article in Special Issue
List Decoding of Arıkan’s PAC Codes
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Entropy
Volume 23
Issue 7
10.3390/e23070880
entropy-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Delay-Sensitive NOMA-HARQ for Short Packet Communications

by
Faisal Nadeem
*,
Mahyar Shirvanimoghaddam
,
Yonghui Li
and
Branka Vucetic
Centre for IoT and Telecommunications, School of Electrical and Information Engineering, The University of Sydney, Sydney, NSW 2006, Australia
*
Author to whom correspondence should be addressed.
Entropy 2021, 23(7), 880; https://doi.org/10.3390/e23070880
Submission received: 9 May 2021 / Revised: 25 June 2021 / Accepted: 6 July 2021 / Published: 9 July 2021
(This article belongs to the Special Issue Short Packet Communications for 5G and Beyond)
Browse Figures
Versions Notes

Abstract

This paper investigates the two-user uplink non-orthogonal multiple access (NOMA) paired with the hybrid automatic repeat request (HARQ) in the finite blocklength regime, where the target latency of each user is the priority. To limit the packet delivery delay and avoid packet queuing of the users, we propose a novel NOMA-HARQ approach where the retransmission of each packet is served non-orthogonally with the new packet in the same time slot. We use a Markov model (MM) to analyze the dynamics of the uplink NOMA-HARQ with one retransmission and characterize the packet error rate (PER), throughput, and latency performance of each user. We also present numerical optimizations to find the optimal power ratios of each user. Numerical results show that the proposed scheme significantly outperforms the standard NOMA-HARQ in terms of packet delivery delay at the target PER.
Keywords: finite blocklength; HARQ; non-orthogonal multiple access; ultra-reliable and low latency communication finite blocklength; HARQ; non-orthogonal multiple access; ultra-reliable and low latency communication

Share and Cite

MDPI and ACS Style

Nadeem, F.; Shirvanimoghaddam, M.; Li, Y.; Vucetic, B. Delay-Sensitive NOMA-HARQ for Short Packet Communications. Entropy 2021, 23, 880. https://doi.org/10.3390/e23070880

AMA Style

Nadeem F, Shirvanimoghaddam M, Li Y, Vucetic B. Delay-Sensitive NOMA-HARQ for Short Packet Communications. Entropy. 2021; 23(7):880. https://doi.org/10.3390/e23070880

Chicago/Turabian Style

Nadeem, Faisal, Mahyar Shirvanimoghaddam, Yonghui Li, and Branka Vucetic. 2021. "Delay-Sensitive NOMA-HARQ for Short Packet Communications" Entropy 23, no. 7: 880. https://doi.org/10.3390/e23070880

APA Style

Nadeem, F., Shirvanimoghaddam, M., Li, Y., & Vucetic, B. (2021). Delay-Sensitive NOMA-HARQ for Short Packet Communications. Entropy, 23(7), 880. https://doi.org/10.3390/e23070880

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop