Joint Relay and Jammer Selection for Secure Two-Way Relay Networks

In this paper, we investigate joint relay and jammer selection in two-way cooperative networks, consisting of two sources, a number of intermediate nodes, and one eavesdropper, with the constraints of physical-layer security. Specifically, the proposed algorithms select two or three intermediate nod...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on information forensics and security 2012-02, Vol.7 (1), p.310-320
Main Authors: Chen, Jingchao, Zhang, Rongqing, Song, Lingyang, Han, Zhu, Jiao, Bingli
Format: Article
Language:English
Subjects:
Computer information security
Cooperative jamming
friendly jammer selection
Interference
Jammers
Jamming
Numerical models
Phases
Physical layer
physical-layer security
Protocols
Relay
Relay networks
relay selection
Relays
Security
Studies
Switches
Switching
two-way relay
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we investigate joint relay and jammer selection in two-way cooperative networks, consisting of two sources, a number of intermediate nodes, and one eavesdropper, with the constraints of physical-layer security. Specifically, the proposed algorithms select two or three intermediate nodes to enhance security against the malicious eavesdropper. The first selected node operates in the conventional relay mode and assists the sources to deliver their data to the corresponding destinations using an amplify-and-forward protocol. The second and third nodes are used in different communication phases as jammers in order to create intentional interference upon the malicious eavesdropper. First, we find that in a topology where the intermediate nodes are randomly and sparsely distributed, the proposed schemes with cooperative jamming outperform the conventional nonjamming schemes within a certain transmitted power regime. We also find that, in the scenario where the intermediate nodes gather as a close cluster, the jamming schemes may be less effective than their nonjamming counterparts. Therefore, we introduce a hybrid scheme to switch between jamming and nonjamming modes. Simulation results validate our theoretical analysis and show that the hybrid switching scheme further improves the secrecy rate.
ISSN:1556-6013
1556-6021
DOI:10.1109/TIFS.2011.2166386