mmWave E-band D2D communications for 5G-underlay networks: Effect of power allocation on D2D and cellular users throughputs

High expectations are tied to the millimeter wave (mmWave) technology and device to device (D2D) communications to leverage the capacity and the spectrum efficiency in 5th generation (5G) systems. In this context, we carry out a resource allocation scheme designed to enable D2D communications underlay cellular network in the E-band. The proposed scheme aims to enhance the system throughput and alleviate the interference caused by dense networks of D2D pairs that share and reuse the same resource blocks of cellular users. We provide a formulation of the optimization problem and indicate its NP-hardness. A great deal of merit is given to our resource re-use solution as it managed to increase the overall system throughput and it achieved significant results in mitigating the interference. Moreover, we shed light on how the system evolves when the transmit powers of both user terminals and device terminals increases.