Adaptive optimal power allocation scheme based on intelligent user association for NOMA-VLC systems

IF 1.9 4区计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS

Optical Switching and Networking Pub Date : 2023-02-01 DOI:10.1016/j.osn.2022.100714

Qian Li, Tao Shang, Tang Tang

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引用次数: 2

Abstract

In this paper, the joint problem of user association and power allocation for non-orthogonal multiple access (NOMA)-visible light communication (VLC) systems is investigated. First, a novel intelligent user association (UA) method for multi-user NOMA-VLC is proposed to improve the multiplexing efficiency. Second, a new adaptive optimal power allocation scheme based on the UA method is presented and three corresponding mathematical optimization problems are established, aiming to optimize the system throughput while each user's illumination requirement, quality of service demand, eye safety, and transmission power limit are satisfied simultaneously. Third, for the error propagation at the NOMA receiver, the perfect and imperfect interference cancellations are considered in the established power allocation models. Finally, the numerical results demonstrate the superiority of the proposed scheme on the VLC network capacity under perfect and imperfect interference cancellation. Furthermore, it is also found that the proposed scheme could achieve higher system throughput by modifying users' field-of-views (FOVs).

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基于智能用户关联的NOMA-VLC系统自适应最优功率分配方案

本文研究了非正交多址（NOMA）-可见光通信（VLC）系统的用户关联和功率分配的联合问题。首先，提出了一种新的多用户NOMA-VLC的智能用户关联（UA）方法，以提高复用效率。其次，提出了一种新的基于UA方法的自适应最优功率分配方案，并建立了三个相应的数学优化问题，旨在优化系统吞吐量，同时满足每个用户的照明需求、服务质量需求、眼睛安全和传输功率限值。第三，对于NOMA接收机处的误差传播，在所建立的功率分配模型中考虑了完全和不完全干扰消除。最后，数值结果表明，在完全和不完全干扰消除的情况下，该方案在VLC网络容量上具有优越性。此外，还发现所提出的方案可以通过修改用户的视场（FOV）来实现更高的系统吞吐量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Switching and Networking COMPUTER SCIENCE, INFORMATION SYSTEMS-OPTICS

CiteScore

5.20

自引率

18.20%

发文量

审稿时长

77 days

期刊介绍： Optical Switching and Networking (OSN) is an archival journal aiming to provide complete coverage of all topics of interest to those involved in the optical and high-speed opto-electronic networking areas. The editorial board is committed to providing detailed, constructive feedback to submitted papers, as well as a fast turn-around time. Optical Switching and Networking considers high-quality, original, and unpublished contributions addressing all aspects of optical and opto-electronic networks. Specific areas of interest include, but are not limited to: • Optical and Opto-Electronic Backbone, Metropolitan and Local Area Networks • Optical Data Center Networks • Elastic optical networks • Green Optical Networks • Software Defined Optical Networks • Novel Multi-layer Architectures and Protocols (Ethernet, Internet, Physical Layer) • Optical Networks for Interet of Things (IOT) • Home Networks, In-Vehicle Networks, and Other Short-Reach Networks • Optical Access Networks • Optical Data Center Interconnection Systems • Optical OFDM and coherent optical network systems • Free Space Optics (FSO) networks • Hybrid Fiber - Wireless Networks • Optical Satellite Networks • Visible Light Communication Networks • Optical Storage Networks • Optical Network Security • Optical Network Resiliance and Reliability • Control Plane Issues and Signaling Protocols • Optical Quality of Service (OQoS) and Impairment Monitoring • Optical Layer Anycast, Broadcast and Multicast • Optical Network Applications, Testbeds and Experimental Networks • Optical Network for Science and High Performance Computing Networks