Abstract
Device-to-Device (D2D) communications play a key role in the mobile communication networks. In spite of its benefits, new system architecture expose the D2D communications to unique security threats. Due to D2D users share the same licensed spectrum resources with the cellular users, both the cellular user and D2D receiver can eavesdrop each other's critical information. Thus, to maximize the secrecy rate from the perspective of physical layer security, the letter proposed a optimal power allocation scheme and subsequently to optimization problem of resource allocation is systematically investigated. The efficacy of the proposed scheme is assessed numerically.
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