Mobile Networks and Applications

, Volume 24, Issue 2, pp 464–479 | Cite as

A Physical Layer Network Coding Based Modify-and-Forward with Opportunistic Secure Cooperative Transmission Protocol

  • Quoc-Tuan VienEmail author
  • Tuan Anh Le
  • Huan X. Nguyen
  • Tho Le-Ngoc


This paper investigates a new secure relaying scheme, namely physical layer network coding based modify-and-forward (PMF), in which a relay node linearly combines the decoded data sent by a source node with an encrypted key before conveying the mixed data to a destination node. We first derive the general expression for the generalized secrecy outage probability (GSOP) of the PMF scheme and then use it to analyse the GSOP performance of various relaying and direct transmission strategies. The GSOP performance comparison indicates that these transmission strategies offer different advantages depending on the channel conditions and target secrecy rates, and relaying is not always desirable in terms of secrecy. Subsequently, we develop an opportunistic secure transmission protocol for cooperative wireless relay networks and formulate an optimisation problem to determine secrecy rate thresholds (SRTs) to dynamically select the optimal transmission strategy for achieving the lowest GSOP. The conditions for the existence of the SRTs are derived for various channel scenarios.


Wireless relay networks Physical layer network coding Decode-and-forward Modify-and-forward Cooperative jamming 


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Faculty of Science and TechnologyMiddlesex UniversityLondonUK
  2. 2.Department of Electrical and Computer EngineeringMcGill UniversityMontrealCanada

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