Research on D2D Communication

The significant development in mobile internet greatly enrich our daily life, meanwhile it challenges the capacity of the current cellular networks. The limited frequency resources are the main bottleneck of the development of cellular networks. Device-to-device(D2D) communication is a new technology that allows mobile terminals to directly communicate with each other by sharing the resources of cells under the control of cellular systems. D2D communication is introduced into cellular networks to improve resource utilization efficiency and increase system throughput. However, it also gives rise to many new challenges. We first introduce the system model and operating principle of D2D communication. Next a survey is made on the recent researches aiming to achieve D2D communication in cellular networks, including session set up, resource optimization, and application.