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    Secrecy outage of threshold-based cooperative relay network with and without direct links

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    Author
    Chopra, K.
    Bose, R.
    Joshi, A.
    Date
    2018
    Journal
    Eurasip Journal on Information Security
    Publisher
    Springer International Publishing
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://dx.doi.org/10.1186/s13635-018-0077-8
    Abstract
    In this paper, we investigate the secrecy outage performance of a dual-hop decode-and-forward (DF) threshold-based cooperative relay network, both with and without the direct links between source-eavesdropper and source-destination. Without assuming that all the relays can always perfectly decode, here we consider that only those relays who satisfy predetermined threshold can correctly decode the message. We have investigated the outage probability of optimal relay selection scheme, when either full instantaneous channel state information (ICSI) or statistical channel state information (SCSI) of all the links is available. We have shown that CSI knowledge at the transmitter can improve secrecy, and the amount of improvement for the outage probability is more when the required rate is low and for low operating SNR. Asymptotic and diversity gain analysis of the secrecy outage for both the single relay and multi-relay system is obtained, when average SNRs of source-relay and relay-destination links are equal or unequal. We have shown that the improvement in predetermined threshold, eavesdropper channel quality, direct links, and required secrecy rate significantly affects the secrecy performance of the system. Copyright 2018, The Author(s).
    Keyword
    Decode-forward relay
    Dual-hop
    Relay selection
    Secrecy capacity
    Secrecy outage probability
    Threshold based
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047930712&doi=10.1186%2fs13635-018-0077-8&partnerID=40&md5=8334e6b44b367cb0078b018d122e4911; http://hdl.handle.net/10713/8834
    ae974a485f413a2113503eed53cd6c53
    10.1186/s13635-018-0077-8
    Scopus Count
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    UMB Open Access Articles 2018

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