Performance Evaluation of D2D Communications for Next Generation Cellular Networks

Fifth-generation (5G) technology plays an essential role in proximate devices that provide a technology where the proximate devices communicate without assisting a base station. Device-to-device (D2D) and vehicle-to-vehicle (V2V) communications are emerging technology used to improve throughput and latency further. D2D communication is considered the most promising technology that utilizes existing cellular frequency bands. This technology plays a vital role in next-generation wireless technology due to its reliability, low-latency, and high-capacity communications. This paper analyzes and investigates the D2D communication based on underlay licensed spectrum in a lower 5G band using a single-cell scenario. This work also provides insights into spectral efficiency improvement based on spectrum sharing between cellular user equipment (CUE) and D2D UE. Simulation results show that the D2D pairs significantly improve the spectrum efficiency through CUEs by increasing the overall sum rate of the cellular network.