On Cooperative Relaying Schemes for Wireless Physical Layer Security

By Jiangyuan Li, Athina P. Petropulu, Steven Weber. IEEE Transactions on Signal Processing, 2010

409 citations recorded by the source corpus.

We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based security. Two different cooperation schemes are considered. In the first scheme, cooperating nodes retransmit a weighted version of the source signal in a decode-and-forward (DF) fashion. In the second scheme, referred to as cooperative jamming (CJ), while the source is transmitting, cooperating nodes transmit weighted noise to confound the eavesdropper. We investigate two objectives: i) maximization of the achievable secrecy rate subject to a total power constraint and ii) minimization of the total power transmit power under a secrecy rate constraint. For the first design objective, we obtain the exact solution for the DF scheme for the case of a single or multiple eavasdroppers, while for the CJ scheme with a single eavesdropper we reduce the multivariate problem to a problem of one variable. For the second design objective, existing work introduces additional constraints in order to reduce the degree of difficulty, thus resulting in suboptimal solutions. Our work raises those constraints, and obtains either an analytical solution for the DF scheme with a single eavesdropper, or reduces the multivariate problem to a problem of one variable for the CJ scheme with a single eavesdropper. Numerical results are presented to illustrate the proposed results and compare them to existing work.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/e4cdde7770d04a93a516cd2b895c5a2aa80cda58

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computer Networks and Communications

In Electrical and Electronic Engineering

Citations in the corpus

Spatially Selective Artificial-Noise Aided Transmit Optimization for MISO Multi-Eves Secrecy Rate Maximization (2013, background): “For example, [3]–[8], [13], [16], [17] restrict AN in the nullspace of the legitimate channel, [11] requires AN to cause no decrease in the legitimate channel’s mutual information, and [9], [18], [19] assume that transmit beamforming is employed to generate AN.”
Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges (2018, background): “Cooperative relay secure transmission with PHY layer security improvements have received significant attention [129]–[130].”
Optimal Cooperative Jamming to Enhance Physical Layer Security Using Relays (2011, methodology): “The works in [ 5 ] and [6] were the first few to investigate the use of CJ. However, their main limitation is that a total relay power constraint was considered and the optimal CJ solution was unknown.”
A Survey on Multiple-Antenna Techniques for Physical Layer Security (2017, background): “In [136], the optimal relay beamformers were designed with the goals of maximization of achievable secrecy rate and minimization of the total transmit power, respectively.”