Overview of D2D Communication Technology under 5G Cellular Network Coverage

At present, information technology is developing rapidly, and the number of various types of user terminals has surged. Although it has brought convenience to communication, it is accompanied by an increasing shortage of resources and the quality of communication cannot be guaranteed. How to effectively improve the utilization rate of wireless resources, the throughput of the communication system, and optimize the user experience and communication quality are the problems that need to be solved urgently. D2D communication has become a key technology in 5G communication by virtue of its ability to effectively improve spectrum utilization, reduce network load, reduce communication delay, and improve network performance. This article introduces D2D communication technology from four aspects: system model, key technology, application scenario, and future research direction.