NDLI: Improving physical layer security in untrusted relay networks: cooperative jamming and power allocation

Content Provider	IET Digital Library
Author	Lv, Lu Chen, Jian Yang, Long Kuo, Yonghong
Abstract	The inherent broadcast characteristics of wireless medium make wireless data transmission difficult to be shielded from unintended recipients. As such, secure communication over wireless channels becomes a critical issue in the design of wireless networks. In this study, the authors study cooperative jamming and power optimisation in untrusted relay networks to improve physical layer security. By exploiting the direct link, a source-based jamming (SBJ) scheme is proposed to hinder the untrusted relay from intercepting the confidential message. Considering the total power budget, a power allocation strategy is also proposed to optimally determine the power of source and untrusted relay as well as the power of information and jamming signals. Furthermore, to evaluate the secrecy performance of the proposed SBJ scheme with the power allocation strategy, tight lower bound of ergodic secrecy capacity and asymptotic secrecy outage probability are derived in closed form. Simulation verifies the advantages of the proposed SBJ scheme and the power allocation strategy.
Starting Page	393
Ending Page	399
Page Count	7
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 3, Feb (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0355
Journal	IET Communications
Publisher Date	2017-02-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic Secrecy Outage Probability Broadcast Communication Confidential Message Cooperative Communication Cooperative Jamming Cryptography Data Communication Electromagnetic Compatibility Ergodic Secrecy Capacity Inherent Broadcast Characteristic Interference Jamming Jamming Signal Optimisation Optimisation Technique Physical Layer Security Improvement Power Allocation Strategy Power Optimisation Probability Radio Link And Equipment Relay Network Reliability SBJ Scheme Secrecy Performance Evaluation Secure Communication Source-based Jamming Scheme Statistics Telecommunication Telecommunication Network Reliability Telecommunication Power Management Untrusted Relay Network Wireless Channel Wireless Data Transmission Wireless Medium Wireless Network Design
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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