Analysis and Design of SCMA-Based Hybrid Unicast-Multicast Relay-Assisted Networks

Zhang, Hongjie; Wang, Xiaoxiang; Wang, Dongyu; Zhang, Yufang; Lan, Yanwen

doi:10.3390/s19020329

Cited by 4 publications

(6 citation statements)

References 31 publications

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“…Many works investigated the NOMA relaying, including the UE and dedicated relays, in numerous scenarios targeting the SE and EE enhancement [97][98][99][100][101][102][103]. The SCMA was recently considered in cooperation with relaying [104][105][106]. In particular, the authors of [105] proposed a joint optimization of power allocation, codebook assignment, and subcarrier pairing to maximize the sum rate in an SCMA-based UL network, while the outage probability analysis for UEs in an SCMA relaying system was reported in [106].…”

Section: Cooperation Among Devicesmentioning

confidence: 99%

A Survey on Non-Orthogonal Multiple Access: From the Perspective of Spectral Efficiency and Energy Efficiency

et al. 2020

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Non-orthogonal multiple access (NOMA) is a promising technology for next-generation wireless networks with emerging demands on low latency, high throughput, and massive connectivity. Unlike orthogonal multiple access, NOMA allows multiple users to share the same radio resources, which significantly improves spectral efficiency (SE). To achieve green wireless communications for numerous networked devices, NOMA helps reduce energy consumption while satisfying rate fairness and quality-of-experience requirements. The goal of this paper is to introduce the innovative approaches for NOMA in terms of the SE and energy efficiency, and discuss emerging technologies involved with NOMA. Further, its challenges and future research directions are highlighted.

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Section: Cooperation Among Devicesmentioning

confidence: 99%

A Survey on Non-Orthogonal Multiple Access: From the Perspective of Spectral Efficiency and Energy Efficiency

et al. 2020

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“…F-OFDM also offers resource allocation flexibility as bandwidth can be parted into variable sized subbands for different applications by applying dynamic numerology, as compared to the persistent numerology of OFDM for the whole spectrum [12]. The time-frequency resource sharing feature of code division multiple access (CDMA) and the division of bandwidth into subbands for multiple users feature of orthogonal frequency division multiple access (OFMDA) are combined to achieve sparse code multiple access (SCMA) mechanism for air interface in 5G [13]. The idea of resource sharing via code domain was pitched quite some time ago in [14].…”

Section: G Schemes For Air Interfacementioning

confidence: 99%

Medium Access-Based Scheduling Scheme for Cyber Physical Systems in 5G Networks

et al. 2020

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The development of the 5G mobile communication standard attempts to meet the future needs of data users. The impact of Cyber Physical Systems (CPS) is crucial in Internet of Things (IoT) and other emerging technologies. The design of medium access mechanisms for CPS such as radio resource scheduling schemes has a significant effect on network performance. Recent literature shows that limited work is available on uplink scheduling schemes, particularly in the 5G domain. Planning a network that can address the modern needs of users entails efficient CPS scheduling mechanisms such that resources are amicably distributed between users of contrasting priorities. The prime focus of this work is to design and develop an uplink radio resource scheduling framework for CPS-based future networks such as 5G. In the designed framework, scarce radio resources are sought to be distributed efficiently according to the service-based needs of users. The proposed scheduling scheme is a service aware (SA) scheduler designed for CPS in accordance with the 5G network peculiarities, intended to achieve higher throughput and reduced latency. The proposed SA scheduler supports multi-bearer traffic and is capable of providing resources in adverse channel conditions in an efficient manner. The SA scheduling mechanism’s performance is evaluated and compared with renowned scheduling algorithms such as blind equal throughput (BET), maximum throughput (MT), and proportional fair (PF) scheduling schemes. The simulation results obtained in a cellular environment demonstrate that the SA scheduler achieves acceptable cell throughput and end-to-end delay results in all scenarios and out-performs other contemporary scheduling schemes.

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“…NOMA is predicted to become popular in beyond fifth-generation cellular communications because of efficient spectrum utilization and cost-effectiveness [6]. It is useful for the PLC environment as well to support different devices for communication at different data speeds [2].…”

Section: Introductionmentioning

confidence: 99%

Wavelet-Transform-Based Sparse Code Multiple Access for Power Line Communication

et al. 2022

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This paper presents Discrete Wavelet Transformed Sparse Code Multiple Access (DWT-SCMA) in Power Line Communication (PLC) systems. In the present internet of things era, PLC provides an established infrastructure for low-cost and reliable indoor connectivity. PLC systems can benefit from the Sparse Code Multiple Access (SCMA) technique, which allows multiple users to access a frequency slot simultaneously to maximize spectrum efficiency. However, interuser interference arises in SCMA when numerous users map their data to the same frequency resource; this, in turn, is likely to be enhanced by the noisy PLC channel. This article adopts the intriguing aspects of DWT to address the interference difficulties. A mathematical model of the proposed technique is also presented and compared with Fast Fourier Transformed SCMA (FFT-SCMA). In the PLC environment, DWT-SCMA is found to outperform FFT-SCMA.

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Analysis and Design of SCMA-Based Hybrid Unicast-Multicast Relay-Assisted Networks

Cited by 4 publications

References 31 publications

A Survey on Non-Orthogonal Multiple Access: From the Perspective of Spectral Efficiency and Energy Efficiency

A Survey on Non-Orthogonal Multiple Access: From the Perspective of Spectral Efficiency and Energy Efficiency

Medium Access-Based Scheduling Scheme for Cyber Physical Systems in 5G Networks

Wavelet-Transform-Based Sparse Code Multiple Access for Power Line Communication

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