Opportunistic Relaying and Random Linear Network Coding for Secure and Reliable Communication

Opportunistic relaying has the potential to achieve full diversity gain, while random linear network coding (RLNC) can reduce latency and energy consumption. In recent years, there has been a growing interest in the integration of both schemes into wireless networks in order to reap their benefits,...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 17; no. 1; pp. 223 - 234
Main Authors: Khan, Amjad Saeed, Chatzigeorgiou, Ioannis
Format: Journal Article
Language:English
Published: IEEE 01.01.2018
Subjects:
intercept probability
Jamming
outage probability
physical-layer security
Power system reliability
Probability
Protocols
random linear network coding
Relay selection
Relays
Reliability
Security
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Summary:Opportunistic relaying has the potential to achieve full diversity gain, while random linear network coding (RLNC) can reduce latency and energy consumption. In recent years, there has been a growing interest in the integration of both schemes into wireless networks in order to reap their benefits, while considering security concerns. This paper considers a multi-relay network, where relay nodes employ RLNC to encode confidential data and transmit coded packets to a destination in the presence of an eavesdropper. Four relay selection protocols are studied covering a range of network capabilities, such as the availability of the eavesdropper's channel state information or the possibility to pair the selected relay with a node that intentionally generates interference. For each case, expressions for the probability that a coded packet will not be recovered by a receiver, which can be either the destination or the eavesdropper, are derived. Based on those expressions, a framework is developed that characterizes the probability of the eavesdropper intercepting a sufficient number of coded packets and partially or fully recovering the confidential data. Simulation results confirm the validity and accuracy of the theoretical framework and unveil the security-reliability trade-offs attained by each RLNC-enabled relay selection protocol.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2017.2764891