A Survey on Device to Device Communications

The demand for the network capacity from the first generation to the current age of technology is exponentially increasing and it leads to scarcity of resources. The increase in the number of users and applications also causes more power consumption. In the future, billions of heterogeneous connected devices will be there and everyone will expect high-quality services. All requirements are to get higher data rates, minimum network latency, greater number of connected devices and more throughput. The existing spectrum resources technologies are insufficient to meet all of these cellular customers’ requirements. Device-to-Device (D2D) communication is a potential strategy for increasing device performance by enabling direct transfer between user pairs that are close to each other. The benefits of employing D2D communication include lower network latency, reduced power consumption, greater throughput, spectrum reuse, and much more coverage area. Because D2D users use the same licensed spectrum as cellular users, interference control between cellular users and D2D users is regarded as one of the most essential concerns when D2D is introduced to cellular networks. We present a detailed review of the various state-of-the-art methodologies for interference management in D2D communication supported in cellular networks. The different D2D communication mode is also investigated using various scenarios for resource sharing between cellular and D2D users. Moreover power consumption techniques are also analyzed to improve the battery life conservation.