D2D user and cellular user communication scheme based on NOMA

LTE network adopts non orthogonal multiple access to enhance network capacity and D2D to improve spectral efficiency. Allowing D2D users to share the spectrum resources of cellular users using non orthogonal multiple access technology can alleviate the current shortage of spectrum resources, but it will also introduce interference between D2D users and cellular users. This paper proposes a research scheme for the sharing between D2D users and cellular users based on non orthogonal multiple access (NOMA) technology. SIC technology is used to eliminate the interference between cellular users and D2D users. This scheme not only optimizes the system throughput by adjusting the transmission power of users, but also improves the performance of edge users. The simulation results show that the communication scheme between D2D users and cellular users based on NOMA is superior to the traditional cellular resource allocation scheme and interference control scheme in performance.