A new pairing scheme for D2D with cellular users in underlay spectrum sharing

In today’s scenario, there is a huge demand for data and a high data rate. This is one of the major reasons for the advancement of communication technology from the first generation to the fifth-generation (5G). Device-to-device (D2D) communication has an active role in 5G. If implemented in the underlay cellular network mode, it can be useful to improve spectral efficiency; however, it creates interference to the cellular user devices (CUD). Here a new scheme for the pairing of D2D with cellular users in an underlay spectrum sharing model has been proposed. The objective is to enhance the total throughput of the cellular users and device-to-device users, to increase the data rate in a cell; maintaining a minimum SINR and transmit power for the cellular devices and device-to-device users both.