A bandwidth-link resources cooperative allocation strategy of data communication in intelligent transportation systems

摘要

The bandwidth resources allocation strategies of the existing Internet of Vehicles (IoV) are mainly base on the communication architecture of the traditional 802.11x in the wireless local area network (WLAN). The traditional communication architecture of IoV will easily cause significant delay and low Packet Delivery Ratio (PDR) for disseminating critical security beacons under the condition of high-speed movement, distance-varying communication, and mixed traffic. This paper proposes a novel bandwidth-link resources cooperative allocation strategy to achieve better communication performance under the road conditions of intelligent transportation systems (ITS). Firstly, in traffic scenarios, based on the characteristic to predict the relative position of the mobile transceivers, a strategy is developed to cooperate on the mobile cellular network and the Dedicated Short-Range Communications (DSRC). Secondly, by adopting the general network simulator NS3, the dedicated mobile channel models that are suitable for the data interaction of ITS, is applied to confirm the feasibility and reliability of the strategy. Finally, by the simulation, comparison, and analysis of some critical performance parameters, we conclude that the novel strategy does not only reduce the system delay but also improve the other communication performance indicators, such as the PDR and communication capacity.