Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying

In this paper, we consider a cooperative orthogonal frequency division multiple access (OFDMA) system, where a source communicates with multiple users with the help of an untrusted relay. Since we assume no direct links between source and users because of the shadowing effect, the positive secrecy r...

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Autores principales:	Yifeng Jin, Xunan Li, Guocheng Lv, Meihui Zhao, Ye Jin
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Physical layer security OFDMA untrusted relay cooperative jamming resource allocation Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/4e76263535a34d76a79cbdb5e782bdc1
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spelling	oai:doaj.org-article:4e76263535a34d76a79cbdb5e782bdc12021-12-02T00:00:22ZSecure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying2169-353610.1109/ACCESS.2021.3130067https://doaj.org/article/4e76263535a34d76a79cbdb5e782bdc12021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9624978/https://doaj.org/toc/2169-3536In this paper, we consider a cooperative orthogonal frequency division multiple access (OFDMA) system, where a source communicates with multiple users with the help of an untrusted relay. Since we assume no direct links between source and users because of the shadowing effect, the positive secrecy rate of the system cannot be obtained directly. Addressing this issue, we employ the user-aided cooperative jamming method to improve the secrecy performance. With the aim of maximizing the weighted sum secrecy rate, we formulate a joint resource allocation problem of power allocation, subcarrier assignment and subcarrier pairing. By using the alternative optimization and the Lagrange dual method, we solve this non-convex problem efficiently. Furthermore, to reduce the calculation complexity, we propose two suboptimal algorithms. Numerical results are presented to demonstrate the advantage of the proposed algorithms compared with the benchmarks on the secrecy performance. Moreover, we show that our proposed algorithms are more sensitive to user priority weights than benchmarks.Yifeng JinXunan LiGuocheng LvMeihui ZhaoYe JinIEEEarticlePhysical layer securityOFDMAuntrusted relaycooperative jammingresource allocationElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 156818-156830 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physical layer security OFDMA untrusted relay cooperative jamming resource allocation Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Physical layer security OFDMA untrusted relay cooperative jamming resource allocation Electrical engineering. Electronics. Nuclear engineering TK1-9971 Yifeng Jin Xunan Li Guocheng Lv Meihui Zhao Ye Jin Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
description	In this paper, we consider a cooperative orthogonal frequency division multiple access (OFDMA) system, where a source communicates with multiple users with the help of an untrusted relay. Since we assume no direct links between source and users because of the shadowing effect, the positive secrecy rate of the system cannot be obtained directly. Addressing this issue, we employ the user-aided cooperative jamming method to improve the secrecy performance. With the aim of maximizing the weighted sum secrecy rate, we formulate a joint resource allocation problem of power allocation, subcarrier assignment and subcarrier pairing. By using the alternative optimization and the Lagrange dual method, we solve this non-convex problem efficiently. Furthermore, to reduce the calculation complexity, we propose two suboptimal algorithms. Numerical results are presented to demonstrate the advantage of the proposed algorithms compared with the benchmarks on the secrecy performance. Moreover, we show that our proposed algorithms are more sensitive to user priority weights than benchmarks.
format	article
author	Yifeng Jin Xunan Li Guocheng Lv Meihui Zhao Ye Jin
author_facet	Yifeng Jin Xunan Li Guocheng Lv Meihui Zhao Ye Jin
author_sort	Yifeng Jin
title	Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
title_short	Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
title_full	Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
title_fullStr	Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
title_full_unstemmed	Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying
title_sort	secure resource allocation for cooperative ofdma system with untrusted af relaying
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/4e76263535a34d76a79cbdb5e782bdc1
work_keys_str_mv	AT yifengjin secureresourceallocationforcooperativeofdmasystemwithuntrustedafrelaying AT xunanli secureresourceallocationforcooperativeofdmasystemwithuntrustedafrelaying AT guochenglv secureresourceallocationforcooperativeofdmasystemwithuntrustedafrelaying AT meihuizhao secureresourceallocationforcooperativeofdmasystemwithuntrustedafrelaying AT yejin secureresourceallocationforcooperativeofdmasystemwithuntrustedafrelaying
_version_	1718403982539358208

Secure Resource Allocation for Cooperative OFDMA System With Untrusted AF Relaying

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