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Two-Stage Relay Selection for Enhancing Physical Layer Security in Non-Orthogonal Multiple Access
- Source :
- IEEE Transactions on Information Forensics and Security. 14:1670-1683
- Publication Year :
- 2019
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2019.
-
Abstract
- In this paper, we examine the physical layer security of a cooperative relay network where two source-destination pairs communicate through a decode-and-forward (DF) relay in the presence of multiple eavesdroppers. To safeguard the legitimate communications against eavesdropping, we propose a novel two-stage secure relay selection (TSSRS) with a non-orthogonal multiple access (NOMA) scheme to maximize the capacity of one source-destination pair, while guaranteeing the successful communication of the other source-destination pair. To explicitly reveal the benefits of our proposed scheme, we derive the exact and asymptotic expressions for its secrecy outage probability. As a benchmark, we also analyze the secrecy performance of the TSSRS strategy with an orthogonal multiple access (OMA) scheme. Both theoretical analysis and simulation results demonstrate that our proposed TSSRS-NOMA scheme significantly outperforms the TSSRS-OMA scheme when the transmit power at the source and relay is in the low and medium regimes. In addition, we show that the advantage of the TSSRS-NOMA scheme over the TSSRS-OMA scheme becomes obvious when the two source-destination pairs have profoundly different secrecy requirements.
- Subjects :
- Scheme (programming language)
021110 strategic, defence & security studies
Computer Networks and Communications
business.industry
Computer science
0211 other engineering and technologies
Physical layer
Eavesdropping
Data_CODINGANDINFORMATIONTHEORY
02 engineering and technology
Transmitter power output
law.invention
Relay
law
Benchmark (computing)
Safety, Risk, Reliability and Quality
business
computer
Selection (genetic algorithm)
Computer network
computer.programming_language
Subjects
Details
- ISSN :
- 15566021 and 15566013
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Information Forensics and Security
- Accession number :
- edsair.doi...........b65c88d283a61a1d731b9daeedc841a7