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Non-orthogonal HARQ for URLLC Design and Analysis
[article]
2021
arXiv
pre-print
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The proposed non-orthogonal HARQ (N-HARQ) utilizes non-orthogonal sharing of time slots for conducting retransmission. ...
The fifth-generation (5G) of mobile standards is expected to provide ultra-reliability and low-latency communications (URLLC) for various applications and services, such as online gaming, wireless industrial ...
CONCLUSION In this paper, we proposed a non-orthogonal HARQ (N-HARQ) strategy for delay-sensitive applications. ...
arXiv:2106.16144v1
fatcat:ixu6f5jqaravni4eign5rctqge
On the Ultra-Reliable and Low-Latency Communications in Flexible TDD/FDD 5G Networks
[article]
2019
arXiv
pre-print
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Specifically, we study the feasibility of the URLLC outage targets compared to the case with the 5G frequency division duplexing (FDD), and with numerous 5G design variants. ...
This paper presents a system level analysis of the URLLC outage performance within the 5G new radio flexible TDD systems. ...
URLLC RADIO LATENCY ANALYSIS The 3GPP 5G-NR release-15 standard has defined several slot format designs [6] . ...
arXiv:1909.11305v1
fatcat:7h5l5ny3srdhtn3t2hyjdh4sdu
Resource Allocation and HARQ Optimization for URLLC Traffic in 5G Wireless Networks
[article]
2018
arXiv
pre-print
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, link SINR , and QoS requirements; 2) resource allocation schemes in Orthogonal Frequency Division Multiple Access (OFDMA) based systems; and 3) Hybrid Automatic Repeat Request (HARQ) schemes. ...
Using a queuing network based model for the wireless system we characterize the effect of various design choices on the maximum URLLC load it can support, including: 1) system parameters such as the bandwidth ...
The line of work [15] , [16] on HARQ design and optimization for URLLC traffic is closely related to our work. ...
arXiv:1804.09201v2
fatcat:gycfgxj5grg6lekvrest4ugc5e
HARQ Optimization for PDCP Duplication-Based 5G URLLC Dual Connectivity
2022
Computers Materials & Continua
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The proposed DRO scheme derives the optimal HARQ retransmission attempts for different ANs by solving a nonlinear integer programming (NLIP) problem. ...
The performance of the proposed DRO scheme was evaluated using MATLAB simulation and is compared to the existing 5G HARQ support schemes. ...
To support URLLC traffic in 5G networks, novel design concepts have been proposed in the physical (PHY) and medium access control (MAC) layers. ...
doi:10.32604/cmc.2022.024824
fatcat:cjahqubugjge3enx47p64h7zxu
An overview of physical layer design for Ultra-Reliable Low-Latency Communications in 3GPP Releases 15, 16, and 17
2020
IEEE Access
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Before joining TCL, he worked with Intel Mobile Communications designing modems for high end smart phones and tablets. ...
The second 5G release, Release 16, was finalized in December 2019 and allows achieving improved metrics for latency and reliability to support new use cases of URLLC. ...
Moreover, if HARQ-ACK for URLLC PDSCH occurs in the same slot as HARQ-ACK for other eMBB/URLLC PDSCHs, all the HARQ-ACK information will be multiplexed together and transmitted over the PUCCH resource ...
doi:10.1109/access.2020.3046773
fatcat:zplh7ll7yjdozhm5k7tkh4tcl4
Delay-Sensitive NOMA-HARQ for Short Packet Communications
2021
Entropy
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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 ...
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 ...
This is because D-NOMA-HARQ is designed for target delay performance and uses less power and time slots by serving retransmission requests non-orthogonally with new arriving packets, whereas in S-NOMA-HARQ ...
doi:10.3390/e23070880
fatcat:yjoq5l3nzbgldh56td6h5pcwcm
System Level Analysis of Uplink Grant-Free Transmission for URLLC
2017
2017 IEEE Globecom Workshops (GC Wkshps)
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The views expressed in this paper are those of the authors and do not necessarily represent the project views. ...
The GF analysis can also be extended with the adoption of other enhancements, as a Non-Orthogonal Coded Access scheme like proposed in [19] , that increases the capacity and reduce collisions with additional ...
While the control signalling is typically designed to be very robust, the potential errors may not be negligible for the range of reliability expected for URLLC. ...
doi:10.1109/glocomw.2017.8269137
dblp:conf/globecom/JacobsenABPMKM17
fatcat:vveyfcdkgbck5lf3jbhr2shim4
Performance Analysis and Optimization of NOMA with HARQ for Short Packet Communications in Massive IoT
[article]
2020
arXiv
pre-print
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In this paper, we consider the massive non-orthogonal multiple access (NOMA) with hybrid automatic repeat request (HARQ) for short packet communications. ...
A simple yet efficient dynamic cell planning is also designed for the uncoordinated scenario. ...
The analysis and design are based on the infinitely long block length assumption. ...
arXiv:2010.00708v1
fatcat:ohucrj25xzavvce4ykj5ho23ta
URLLC for 5G and Beyond: Requirements, Enabling Incumbent Technologies and Network Intelligence
2021
IEEE Access
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DL HARQ feedback is fundamentally asynchronous and adaptive, while UL HARQ is synchronous and non-adaptive. ...
design in singular value decomposition based HARQ feedback. ...
.: URLLC for 5G and Beyond SAHIL GARG received the Ph.D. degree from the Thapar Institute of Engineering and Technology, Patiala, India, in 2018. ...
doi:10.1109/access.2021.3073806
fatcat:7ngx3ah5vzdyvcz4nkd2vvdyjy
Analyzing Grant-Free Access for URLLC Service
[article]
2020
arXiv
pre-print
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Specifically, we present a spatiotemporal analytical framework for the contention-based GF access analysis. ...
Current Long Term Evolution (LTE) system has been designed based on grantbased (GB) (i.e., dynamic grant) random access, which can hardly support the URLLC requirements. ...
GF HARQ schemes for URLLC requirements. ...
arXiv:2002.07842v2
fatcat:6kaixjquyjfilhl3stltgim5qa
Opportunistic Spatial Preemptive Scheduling for URLLC and eMBB Coexistence in Multi-User 5G Networks
2018
IEEE Access
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In this paper, a null-space-based spatial preemptive scheduler for joint URLLC and eMBB traffic is proposed for the densely populated 5G networks. ...
Analytical analysis and extensive system level simulations are conducted to evaluate the performance of the proposed scheduler against the state-of-the-art scheduler proposals from industry and academia ...
ACKNOWLEDGMENTS The authors would like to acknowledge the contributions of their colleagues in the project, although the views expressed in this contribution are those of the authors and do not necessarily ...
doi:10.1109/access.2018.2854292
fatcat:ted7e7n5mrhktf632s3dljdd44
Analyzing Grant-Free Access for URLLC Service
2020
IEEE Journal on Selected Areas in Communications
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Specifically, we present a spatio-temporal analytical framework for the contention-based GF access analysis. ...
Current Long Term Evolution (LTE) system has been designed based on grant-based (GB) (i.e., dynamic grant) random access, which can hardly support the URLLC requirements. ...
GF HARQ schemes for URLLC requirements. ...
doi:10.1109/jsac.2020.3018822
fatcat:nfsyao73zffy5dyv4726rzfwlq
Reliability and User-Plane Latency Analysis of mmWave Massive MIMO for Grant-Free URLLC Applications
[article]
2021
arXiv
pre-print
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with reactive and K-repetition hybrid automatic repeat request (HARQ) protocols. ...
We derive closed-form approximate expressions for the latent access failure probability and validate them using numerical simulations. ...
We assume that there are N S subcarriers reserved for grant-free URLLC transmissions and N P orthogonal preambles. ...
arXiv:2107.08151v1
fatcat:zreriq36uveilge37f7athukbm
How URLLC can Benefit from NOMA-based Retransmissions
[article]
2020
arXiv
pre-print
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The results show that NOMA can indeed lead to highly efficient system operation compared to the case in which all HARQ processes are run orthogonally. ...
The performance is investigated under two different assumptions about the Channel State Information (CSI) availability: statistical and instantaneous. ...
The shortcomings of HARQ can be mitigated with the help of non-orthogonal multiple access (NOMA). ...
arXiv:2007.04677v1
fatcat:yftmvwp3pbbyhmpnq3pobscb3e
HARQ in Full-Duplex Relay-Assisted Transmissions for URLLC
2021
IEEE Open Journal of the Communications Society
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Taking up these challenges, this article proposes a hybrid FD amplify-and-forward (AF)-selective decode-and-forward (SDF) relay-based system for URLLC. ...
Indeed, the HARQ roundtrip time (RTT) is known to include basic physical delays that may cause the HARQ abandonment for the 1 ms latency use case of URLLC. ...
However, for the sake of simplicity, we proceed in this study, with the case of sufficiently long codes since it has 9 Channel code design for URLLC with the fundamental capacity bound of Polyanskiy ...
doi:10.1109/ojcoms.2021.3055073
fatcat:6i5t2pqc6becfepbaen5fqliz4
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