Transmission Energy Minimization for Heterogeneous Low-Latency NOMA Downlink

Xu, Yanqing; Shen, Chao; Chang, Tsung-Hui; Lin, Shih‐Chun; Zhao, Yajun; Zhu, Gang

doi:10.1109/twc.2019.2950318

Cited by 69 publications

(39 citation statements)

References 36 publications

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“…Recently, there have been a few works on SPC in NOMA systems, which is considered as a promising solution to enhance the reliability, latency, and connectivity for wireless networks [29][30][31][32][33][34][35][36]. In particular, in [29], a two-user NOMA system with short-packets over Rayleigh fading channels was considered, in which the average BLER at users is derived to evaluate the system performance.…”

Section: A Related Workmentioning

confidence: 99%

“…In [31], X. Lai et al analyzed the performance of a cooperative NOMA SPC system over Rayleigh fading channels. Furthermore, the transmission energy minimization problem and packet scheduling for two-user downlink NOMA systems with strictly heterogeneous latency constraints were investigated in [32,33]. However, the works [29][30][31][32][33] only considered singleinput single-output (SISO) systems.…”

Section: A Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-m Fading: BLER and Minimum Blocklength Analysis

Tran

Sharma

Chatzinotas

et al. 2021

IEEE Trans. Veh. Technol.

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Recently, ultra-reliable and low-latency communications (URLLC) using short-packets has been proposed to fulfill the stringent requirements regarding reliability and latency of emerging applications in 5G and beyond networks. In addition, multiple-input multiple-output non-orthogonal multiple access (MIMO NOMA) is a potential candidate to improve the spectral efficiency, reliability, latency, and connectivity of wireless systems. In this paper, we investigate short-packet communications (SPC) in a multiuser downlink MIMO NOMA system over Nakagamim fading, and propose two antenna-user selection methods considering two clusters of users having different priority levels. In contrast to the widely-used long data-packet assumption, the SPC analysis requires the redesign of the communication protocols and novel performance metrics. Given this context, we analyze the SPC performance of MIMO NOMA systems using the average block error rate (BLER) and minimum blocklength, instead of the conventional metrics such as ergodic capacity and outage capacity. More specifically, to characterize the system performance regarding SPC, asymptotic (in the high signal-tonoise ratio regime) and approximate closed-form expressions of the average BLER at the users are derived. Based on the asymptotic behavior of the average BLER, an analysis of the diversity order, minimum blocklength, and optimal power allocation is carried out. The achieved results show that MIMO NOMA can serve multiple users simultaneously using a smaller blocklength compared with MIMO OMA, thus demonstrating the benefits of MIMO NOMA for SPC in minimizing the transmission latency. Furthermore, our results indicate that the proposed methods not only improve the BLER performance, but also guarantee full diversity gains for the respective users.

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Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-m Fading: BLER and Minimum Blocklength Analysis

Tran

Sharma

Chatzinotas

et al. 2021

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…The signals create inter-user interference, but the base station can employ successive interference cancellation (SIC), i.e., decode one of the signals and then subtract the corresponding codeword from the received signal, such that the other signal is interferencefree. As a result, NOMA can increase spectral efficiency and improve reliability [14], [55], [68]- [70].…”

Section: E Network Slicingmentioning

confidence: 99%

“…The work in [14] considered the issue of energy-efficient transmissions for URLLC multiuser channels. The work pointed out that the SIC technique may not always be feasible since there exist situations where none of the receivers can perform SIC and decode messages of the other users.…”

Section: E Network Slicingmentioning

confidence: 99%

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A Classification of the Enabling Techniques for Low Latency and Reliable Communications in 5G and Beyond: AI-Enabled Edge Caching

Mutalemwa

Shin

2020

IEEE Access

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Markov‐based analysis for cooperative HARQ‐aided NOMA transmission scheme in 5G and beyond

Al‐Zubi

Darabkh

Khattabi

et al. 2022

Trans Emerging Tel Tech

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In the fifth generation (5G) wireless communication system, the non‐orthogonal multiple access (NOMA) scheme has recently been proposed as a possible candidate for improving spectral efficiency. We look at power‐domain NOMA in this study, in which, multiple simultaneous transmissions are allowed at the same channel with different transmission powers. To achieve reliable transmissions in NOMA, the hybrid automatic repeat request (HARQ) scheme can be integrated into NOMA. The performance of a downlink NOMA system using the Type I HARQ method is investigated in this research. This type of HARQ does not entail expensive device which is considered one of the requirements for a massive 5G‐based Internet of Things network. Unfortunately, in the literature, it has been shown that deriving closed‐form expressions for the outage probabilities of HARQ‐aided NOMA systems is intractable due to the incorporation of multiple fractional random variables. Consequently, in this article, we follow a simple yet efficient methodology to study our considered HARQ‐aided NOMA system. The HARQ‐assisted NOMA system on the downlink is modeled as an absorbing discrete‐time Markov chain (DTMC). Thereafter, under perfect and imperfect channel estimation, we use this model to examine system performance in terms of outage probability and estimated number of retransmissions. Interestingly, we demonstrate that our DTMC‐based analysis is straightforward, repeatable, and accurate. Moreover, in this article, we propose a cooperative HARQ (CHARQ) scheme for the downlink NOMA system. According to CHARQ, the users cooperate with the base station in the retransmission process that will result in improving the performance of NOMA. Monte Carlo simulations have been conducted to not only verify the accuracy of our DTMC‐based analysis, but also manifest the superiority of CHARQ over HARQ.

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Transmission Energy Minimization for Heterogeneous Low-Latency NOMA Downlink

Cited by 69 publications

References 36 publications

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-m Fading: BLER and Minimum Blocklength Analysis

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-m Fading: BLER and Minimum Blocklength Analysis

A Classification of the Enabling Techniques for Low Latency and Reliable Communications in 5G and Beyond: AI-Enabled Edge Caching

Markov‐based analysis for cooperative HARQ‐aided NOMA transmission scheme in 5G and beyond

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