Resource Allocation Schemes for D2D Communication used in VANETs

Many researchers have recently proposed using LTE to support traffic safety and transportation efficiency applications in vehicular ad hoc networks (VANETs). The device-to-device (D2D) communication technique underlay LTE network has been considered as an effective way to potentially conduct vehicle-to-vehicle (V2V) communications. Since the vehicular communication environment has different characteristics compared with conventional cellular systems, efficient resource allocation strategies for D2D communications in VANETs are demanded. In this paper, we propose two such algorithms aiming at minimizing the consumption of cellular radio resources. We divide the vehicles on a road into multiple clusters, each of which utilizes a single cellular user's resource. One of the proposed algorithms is constructed based on the dynamic programming technique to search the optimal clustering solution. The other seeks to solve the resource allocation problem with low computing complexity. The performances of the algorithms are exhibited through simulations under practical traffic environments.