Transmission Mode Selection and Interference Mitigation for Social Aware D2D Communication

To further increase the system capacity in cellular networks, establishing stable D2D (Device-to-Device) links with efficient power allocation is necessary due to the communication interferences. Existing works are mainly focused on the interference control and mitigation at the physical layer. However, the information from social interactions among D2D users are also helpful to improve the system performance. In this paper, we first evaluate the level of social ties and take it as the decision metric for transmission mode selection, which can effectively offload mobile traffic. Then a utility-based maximization game is proposed to reduce interference among D2D pairs. In this game, we use the effective social distance as the penalty coefficient, and perform distributed control of the transmission power for D2D communication. Numerical results demonstrate that the proposed scheme significantly improve the delivery ratio and reduce interference by only sacrificing a small amount of total utility.