On vehicular safety message transmissions through LTE-Advanced networks

We also propose a scheme that uses both LTE-D2D and LTE-cellular communication for transmission of safety messages. Vehicles transmit their safety messages with longer periods to the central server. This location information is used to determine the possible D2D pairs, as well as centralized resource allocation for the following period. Vehicles use the allocated resources for transmission of their safety messages to their neighboring vehicles using D2D communication. The simulation results show the effectiveness of our solutions in the cellular-only approach. These results also show that the proposed D2D-cellular scheme can reduce the required resources, while satisfying the requirements of safety applications.