Social-Trust and Power-Efficient Relay Selection for Device-to-Device Underlaying Distributed Shared Network

In distributed sharing network, limited by short transmission distance, users need to utilize device-to-device (D2D) communication technology to select idle relay users to support communication transmission and realize resource sharing. D2D communication technology is the core technology to realize resource sharing and information interaction in wireless communication system. This paper proposes a new relay selection strategy based on social-trust and power-efficient for device-to-device underlaying distributed shared network. It mainly involves two network architectures: physical transmission layer and social network layer. According to their own physical location information, users with strong social trust are selected as candidate relay users to prepare for subsequent relay communication. In addition, the optimal relay selection is achieved by considering the factors of quality of service (QoS) and power consumption. Simulation results show that the proposed algorithm has the lowest average power consumption compared to the existing methods.