Physical Layer Security Using Two-Path Successive Relaying

Physical Layer Security Using Two-Path Successive Relaying

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Relaying is one of the useful techniques to enhance wireless physical-layer security.Existing literature shows that employing full-duplex relay instead of conventional half-duplex relay improves secrecy capacity and secrecy outage probability, but this is at the price of sophisticated implementation.As an alternative, two-path successive relaying has been proposed to emulate operation of full-duplex relay by scheduling a pair of half-duplex relays to assist the source transmission alternately.However, the performance of two-path successive relaying in secrecy communication remains unexplored.

This paper proposes a secrecy two-path here successive relaying protocol for a scenario with one source, one destination and two half-duplex relays.The relays operate alternately in a time click here division mode to forward messages continuously from source to destination in the presence of an eavesdropper.Analytical results reveal that the use of two half-duplex relays in the proposed scheme contributes towards a quadratically lower probability of interception compared to full-duplex relaying.Numerical simulations show that the proposed protocol achieves the ergodic achievable secrecy rate of full-duplex relaying while delivering the lowest probability of interception and secrecy outage probability compared to the existing half duplex relaying, full duplex relaying and full duplex jamming schemes.