213 Hits in 5.0 sec

Non-orthogonal HARQ for URLLC Design and Analysis [article]

Faisal Nadeem, Mahyar Shirvanimoghaddam, Yonghui Li, Branka Vucetic
2021 arXiv   pre-print
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]

Ali A. Esswie, Klaus I. Pedersen
2019 arXiv   pre-print
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]

Arjun Anand, Gustavo de Veciana
2018 arXiv   pre-print
, 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

Changsung Lee, Junsung Kim, Jaewook Jung, Jungsuk Baik, Jong-Moon Chung
2022 Computers Materials & Continua  
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

Trung-Kien Le, Umer Salim, Florian Kaltenberger
2020 IEEE Access  
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

Faisal Nadeem, Mahyar Shirvanimoghaddam, Yonghui Li, Branka Vucetic
2021 Entropy  
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

Thomas Jacobsen, Renato Abreu, Gilberto Berardinelli, Klaus Pedersen, Preben Mogensen, Istvan Z. Kovacs, Tatiana K. Madsen
2017 2017 IEEE Globecom Workshops (GC Wkshps)  
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]

Fatemeh Ghanami, Ghosheh Abed Hodtani, Branka Vucetic, Mahyar Shirvanimoghaddam
2020 arXiv   pre-print
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

Rashid Ali, Yousaf Bin Zikria, Ali Kashif Bashir, Sahil Garg, Hyung Seok Kim
2021 IEEE Access  
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]

Yan Liu, Yansha Deng, Maged Elkashlan, Arumugam Nallanathan, George K. Karagiannidis
2020 arXiv   pre-print
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

Ali A. Esswie, Klaus I. Pedersen
2018 IEEE Access  
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

Yan Liu, Yansha Deng, Maged Elkashlan, Arumugam Nallanathan, George K. Karagiannidis
2020 IEEE Journal on Selected Areas in Communications  
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]

Joao V. C. Evangelista and Georges Kaddoum and Zeeshan Sattar
2021 arXiv   pre-print
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]

Radosław Kotaba, Carles Navarro Manchón, Tommaso Balercia, Petar Popovski
2020 arXiv   pre-print
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

Fatima Ezzahra Airod, Houda Chafnaji, Halim Yanikomeroglu
2021 IEEE Open Journal of the Communications Society  
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
« Previous Showing results 1 — 15 out of 213 results