NDLI: Improving physical-layer security for primary users in cognitive radio networks

Content Provider	IET Digital Library
Author	Xu, Ding Li, Qun
Abstract	In this study, the authors investigate the physical-layer security in a cognitive radio network where both the secondary user (SU) and the primary user (PU) are facing security threats from the malicious eavesdroppers. To protect the PU, the SU acts as a friendly jammer to interfere with the eavesdroppers by splitting a certain portion of the transmit power for sending the jamming noise. The problem of optimising SU scheduling, power allocation and power splitting ratio to maximise the SU ergodic secrecy rate subject to the PU secrecy outage constraint with imperfect channel state information available at the SU is investigated based on the dual optimisation method. In addition, a greedy algorithm is also proposed for minimising the PU secrecy outage probability. Simulation results indicate that the proposed algorithms are effective in improving the PU secrecy performance in terms of secrecy outage probability as well as providing secure communications for the SU.
Starting Page	2303
Ending Page	2310
Page Count	8
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 15, Oct (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.0323
Journal	IET Communications
Publisher Date	2017-07-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cognitive Radio Cognitive Radio Network Dual Optimisation Method Electromagnetic Compatibility Greedy Algorithm Interference Jamming Jamming Noise Malicious Eavesdroppers Minimisation Optimisation Technique Physical-layer Security Improvement Power Allocation And Power Splitting Ratio Primary User Probability PU Secrecy Outage Constraint PU Secrecy Outage Probability Minimisation Radio Link And Equipment Reliability Secondary User Statistics SU Scheduling Optimisation Problem Telecommunication Network Reliability Telecommunication Scheduling Telecommunication Security
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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