Optimization of Power Allocation for Full Duplex Relay-Assisted D2D Communication Underlaying Wireless Cellular Networks

This paper investigates the power allocation for full duplex relay-assisted D2D communication underlaying wireless cellular networks. Firstly, we derive the outage probability of the full duplex relay-assisted D2D link in an interference-limited scenario. Then, we formulate the power allocation problem by minimizing the outage probability while fulfilling the interference inflicted on the cellular user is below a predetermined threshold. Considering the maximum transmit power constraint of the source user and relay user, we find that the optimal solution should be on three possible boundaries of the feasible region. For each boundary, we obtain the optimal solution. Finally, simulation results are presented to validate the correctness and feasibility of the proposed optimal power allocation scheme.

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