On Secure CDRT with NOMA and Physical-Layer Network Coding

This paper proposes a new scheme to enhance the secrecy performance of non-orthogonal multiple access (NOMA)-based coordinated direct relay transmission (CDRT) systems with an untrusted relay. The physical-layer network coding (PNC) and the NOMA schemes are combined to improve spectrum efficiency. F...

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Published in:	IEEE transactions on communications Vol. 71; no. 1; p. 1
Main Authors:	Lei, Hongjiang, She, Xusheng, Park, Ki-Hong, Ansari, Imran Shafique, Shi, Zheng, Jiang, Jing, Alouini, Mohamed-Slim
Format:	Journal Article
Language:	English
Published:	New York IEEE 01.01.2023 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Coding Coordinated direct relay transmission Downlink Eavesdropping ergodic secrecy sum rate Jamming NOMA non-orthogonal multiple access Nonorthogonal multiple access physical layer security physical-layer network coding Relay Relays Security Signal to noise ratio Throughput Uplink
ISSN:	0090-6778, 1558-0857
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Abstract	This paper proposes a new scheme to enhance the secrecy performance of non-orthogonal multiple access (NOMA)-based coordinated direct relay transmission (CDRT) systems with an untrusted relay. The physical-layer network coding (PNC) and the NOMA schemes are combined to improve spectrum efficiency. Furthermore, inter-user interference and friendly jamming signals are utilized to suppress the eavesdropping ability of the untrusted relay without compromising the acceptance quality of legitimate users. Specifically, the far user in the first slot and the near user in the second slot act as jammers that generate jamming signals to ensure secure transmissions of confidential messages. We investigate the secrecy performance of the NOMA-based CDRT systems with the PNC scheme and derive the closed-form expression for the ergodic secrecy sum rate. The asymptotic analysis at a high signal-to-noise ratio is performed to obtain more insights. Finally, simulation results are presented to demonstrate the proposed scheme's effectiveness and the theoretical analysis's correctness.
AbstractList	This paper proposes a new scheme to enhance the secrecy performance of non-orthogonal multiple access (NOMA)-based coordinated direct relay transmission (CDRT) systems with an untrusted relay. The physical-layer network coding (PNC) and the NOMA schemes are combined to improve spectrum efficiency. Furthermore, inter-user interference and friendly jamming signals are utilized to suppress the eavesdropping ability of the untrusted relay without compromising the acceptance quality of legitimate users. Specifically, the far user in the first slot and the near user in the second slot act as jammers that generate jamming signals to ensure secure transmissions of confidential messages. We investigate the secrecy performance of the NOMA-based CDRT systems with the PNC scheme and derive the closed-form expression for the ergodic secrecy sum rate. The asymptotic analysis at a high signal-to-noise ratio is performed to obtain more insights. Finally, simulation results are presented to demonstrate the proposed scheme's effectiveness and the theoretical analysis's correctness.
Author	Park, Ki-Hong Jiang, Jing Shi, Zheng Ansari, Imran Shafique Alouini, Mohamed-Slim Lei, Hongjiang She, Xusheng
Author_xml	– sequence: 1 givenname: Hongjiang orcidid: 0000-0002-9070-6300 surname: Lei fullname: Lei, Hongjiang organization: School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China – sequence: 2 givenname: Xusheng surname: She fullname: She, Xusheng organization: School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China – sequence: 3 givenname: Ki-Hong orcidid: 0000-0002-6867-4277 surname: Park fullname: Park, Ki-Hong organization: CEMSE Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia – sequence: 4 givenname: Imran Shafique orcidid: 0000-0001-8461-6547 surname: Ansari fullname: Ansari, Imran Shafique organization: James Watt School of Engineering, University of Glasgow, Glasgow, United Kingdom – sequence: 5 givenname: Zheng orcidid: 0000-0003-3531-9217 surname: Shi fullname: Shi, Zheng organization: School of Intelligent Systems Science and Engineering, Jinan University, Zhuhai, China – sequence: 6 givenname: Jing orcidid: 0000-0003-3242-912X surname: Jiang fullname: Jiang, Jing organization: Shaanxi Key Laboratory of Information Communication Network and Security, Xi'an University of Posts and Telecommunications, Xi'an, Shaanxi, China – sequence: 7 givenname: Mohamed-Slim orcidid: 0000-0003-4827-1793 surname: Alouini fullname: Alouini, Mohamed-Slim organization: CEMSE Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
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SubjectTerms	Coding Coordinated direct relay transmission Downlink Eavesdropping ergodic secrecy sum rate Jamming NOMA non-orthogonal multiple access Nonorthogonal multiple access physical layer security physical-layer network coding Relay Relays Security Signal to noise ratio Throughput Uplink
Title	On Secure CDRT with NOMA and Physical-Layer Network Coding
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