Reliability Improvement Using Power Control in Device-to-Device Networks

In this paper, a new power control scheme is proposed to improve the reliability of a Device-to-Device (D2D) communication. The proposed scheme is optimal in terms of the probability of successful transmission. All transmitters in the network form a homogeneous Poisson Point Process (PPP). The complementary cumulative distribution function (CCDF) of the transmit power is derived at D2D receiver by using a complex channel model. In order to obtain the optimal transmission power of D2D communication, an expected transmission scale function Z is designed, based on the CCDF of transmit power which is obtained in the above procedure. The optimum transmit power is calculated through maximizing function Z for different D2D communication distance and different noisevariance. The numerical results show that the transmit power of D2D link is effectively controlled. Our scheme achieves better performance on success probability than the fixed power scheme in good channel condition and their performances maintain the same in poor channel condition.