Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing

In this paper, we consider a novel cooperative underlay cognitive radio network based on non-orthogonal multiple access (CR-NOMA) with adaptive relay selection and power allocation. In secondary networks, dedicated relay assistance and user assistance are used to achieve communication between the ba...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Suoping Li, Wenwu Liang, Vicent Pla, Nana Yang, Sa Yang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cognitive radio networks non-orthogonal multiple access underlay spectrum sharing relay selection power allocation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/443192bcda1248ac8a6b5722804a5374
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:443192bcda1248ac8a6b5722804a5374
record_format	dspace
spelling	oai:doaj.org-article:443192bcda1248ac8a6b5722804a53742021-11-11T15:24:12ZTwo-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing10.3390/app1121104332076-3417https://doaj.org/article/443192bcda1248ac8a6b5722804a53742021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10433https://doaj.org/toc/2076-3417In this paper, we consider a novel cooperative underlay cognitive radio network based on non-orthogonal multiple access (CR-NOMA) with adaptive relay selection and power allocation. In secondary networks, dedicated relay assistance and user assistance are used to achieve communication between the base station and the far (and near) user. Here, a two-stage adaptive relay selection and power allocation strategy is proposed to maximize the achievable data rate of the far user while ensuring the service quality of near user. Furthermore, the closed-form expressions of outage probability of two secondary users are derived, respectively, under interference power constraints, revealing the impact of transmit power, number of relays, interference threshold and target data rate on system outage probability. Numerical results and simulations validate the advantages of the established cooperation and show that the proposed adaptive relay selection and power allocation strategy has better outage performance.Suoping LiWenwu LiangVicent PlaNana YangSa YangMDPI AGarticlecognitive radio networksnon-orthogonal multiple accessunderlay spectrum sharingrelay selectionpower allocationTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10433, p 10433 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cognitive radio networks non-orthogonal multiple access underlay spectrum sharing relay selection power allocation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	cognitive radio networks non-orthogonal multiple access underlay spectrum sharing relay selection power allocation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Suoping Li Wenwu Liang Vicent Pla Nana Yang Sa Yang Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
description	In this paper, we consider a novel cooperative underlay cognitive radio network based on non-orthogonal multiple access (CR-NOMA) with adaptive relay selection and power allocation. In secondary networks, dedicated relay assistance and user assistance are used to achieve communication between the base station and the far (and near) user. Here, a two-stage adaptive relay selection and power allocation strategy is proposed to maximize the achievable data rate of the far user while ensuring the service quality of near user. Furthermore, the closed-form expressions of outage probability of two secondary users are derived, respectively, under interference power constraints, revealing the impact of transmit power, number of relays, interference threshold and target data rate on system outage probability. Numerical results and simulations validate the advantages of the established cooperation and show that the proposed adaptive relay selection and power allocation strategy has better outage performance.
format	article
author	Suoping Li Wenwu Liang Vicent Pla Nana Yang Sa Yang
author_facet	Suoping Li Wenwu Liang Vicent Pla Nana Yang Sa Yang
author_sort	Suoping Li
title	Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
title_short	Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
title_full	Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
title_fullStr	Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
title_full_unstemmed	Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing
title_sort	two-stage adaptive relay selection and power allocation strategy for cooperative cr-noma networks in underlay spectrum sharing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/443192bcda1248ac8a6b5722804a5374
work_keys_str_mv	AT suopingli twostageadaptiverelayselectionandpowerallocationstrategyforcooperativecrnomanetworksinunderlayspectrumsharing AT wenwuliang twostageadaptiverelayselectionandpowerallocationstrategyforcooperativecrnomanetworksinunderlayspectrumsharing AT vicentpla twostageadaptiverelayselectionandpowerallocationstrategyforcooperativecrnomanetworksinunderlayspectrumsharing AT nanayang twostageadaptiverelayselectionandpowerallocationstrategyforcooperativecrnomanetworksinunderlayspectrumsharing AT sayang twostageadaptiverelayselectionandpowerallocationstrategyforcooperativecrnomanetworksinunderlayspectrumsharing
_version_	1718435362195374080

Two-Stage Adaptive Relay Selection and Power Allocation Strategy for Cooperative CR-NOMA Networks in Underlay Spectrum Sharing

Ejemplares similares