Abstract: Aiming at the problem that the current D2D ( Device-to-Device) communication applied in the Internet of Vehicles, is only considering the resource utilization rate or system traversal capacity of the D2D multiplexing mode, but does not include other D2D modes into the system, an algorithm that takes into account resource allocation and mode selection is proposed. The communication resource utilization rate is improved by the priority multiplexing mode, the cellular mode is adopted for the D2D vehicle pair (D-UE:Device-to-device UsErs) that does not meet the multiplexing mode, the C-UE (Cellular UsErs) is adopted to meet the basic requirements of D-UE, and different resource access modes are allocated to D-UE considering factors such as vehicle and cellular users, BS ( Base Station) distance and signal-to-noise ratio between D-UE. Theoretical calculation and simulation results show that the proposed resource allocation and mode selection scheme can effectively improve the system capacity and D-UE QoS (Quality of Service).

Key words: D2D communication, resource allocation, mode selection, vehicle networking communication