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Peer-to-Peer Networking and Applications

Erschienen in:

11.06.2021

Energy efficiency maximization for beyond 5G NOMA-enabled heterogeneous networks

verfasst von: Wali Ullah Khan, Xingwang Li, Asim Ihsan, Zain Ali, Basem M. Elhalawany, Guftaar Ahmed Sardar Sidhu

Erschienen in: Peer-to-Peer Networking and Applications | Ausgabe 5/2021

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Abstract

Non-orthogonal multiple access (NOMA) is expected to play a critical role in heterogeneous networks (HetNets) for beyond fifth-generation (5G) wireless systems. The unrivaled benefits of NOMA along with the multi-tier architecture of HetNets has the potential to significantly improve the performance of cellular networks. Motivated by such possibilities, this article provides a new resource optimization scheme for efficient cellular device association and optimal power control in NOMA-enabled HetNets. Our objective is to maximize the energy efficiency of the proposed HetNets while guaranteeing the signal decoding and minimum rate of each cellular device. The problem of cellular device association and power control is jointly formulated as a non-convex optimization. Since the problem of energy efficiency is coupled with both devise association and power control, it contains high complexity and, hence, it is very difficult to obtain the joint solution. To obtain an efficient solution and reduce the complexity, we decouple the original problem into two subproblems for efficient device association and optimal power control. For any given power allocation of base stations (BSs), we first adopt dual theory for cellular device association, and then a new sequential quadratic programming (SQP) is employed to calculate the optimal power control. Later, we also present the benchmark suboptimal power control method which is based on Karush-Kuhn-Tucker conditions. Monte Carlo simulation results unveil that the proposed NOMA resource optimization scheme in HetNets can significantly improve the system performance compared to the benchmark NOMA and orthogonal multiple access (OMA) schemes.

Vorheriger Artikel Deep learning application for sensing available spectrum for cognitive radio: An ECRNN approach

Nächster Artikel Space-air-ground integrated networks for future IoT: Architecture, management, service and performance

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In this paper, we consider a single-carrier for communication in all cells. The multi-carrier communication can certainly further enhance the system performance, but we leave it for the future work to focus on efficient user association and optimal power control.

Due to novelty and complexity of the considered network setup, it is not straightforward to provide a direct comparison to the other studies in the literature. Thus, we resort to comparing the proposed scheme with the KKT-based scheme.

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Titel: Energy efficiency maximization for beyond 5G NOMA-enabled heterogeneous networks
verfasst von: Wali Ullah Khan
Xingwang Li
Asim Ihsan
Zain Ali
Basem M. Elhalawany
Guftaar Ahmed Sardar Sidhu
Publikationsdatum: 11.06.2021
Verlag: Springer US
Erschienen in: Peer-to-Peer Networking and Applications / Ausgabe 5/2021
Print ISSN: 1936-6442
Elektronische ISSN: 1936-6450
DOI: https://doi.org/10.1007/s12083-021-01176-5

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