Abstract
As an important infrastructure of intelligent transportation system (ITS), vehicular ad hoc networks (VANETs) provide navigation and positioning, information services, driver assistance, in-vehicle entertainment, and other functions for the owners improving the development of the future smart city. Due to the high dynamic nature of VANETs, choosing a relatively stable and reliable transmission path to reduce the link breakage is obviously very important. In this paper, we propose an efficient prediction-based data forwarding strategy to ensure the reliability and efficiency of data transmission in VANETs. Besides the link lifetime prediction, we introduce a new metric named link utility used in the process of forwarder selection, in order to improve data forwarding efficiency. Link utility reflects the impact of relative velocity and distance between the vehicles on the efficiency of intervehicle data transmissions. It can be used to optimize packet routing and minimize number of hops especially in the high-density VANETs. Finally, we evaluate the performance of the proposed forwarding strategy through simulation confirming its feasibility and effectiveness.
Highlights
Vehicular ad hoc network (VANET) is an application of the Internet of Things (IoT) in the automotive field, providing driving safety and comfort [1]
We have proposed an efficient prediction-based data forwarding strategy to provide reliable and efficient data transmission in vehicular ad hoc networks
In general, when our proposed forwarding scheme was introduced into a routing protocol, better end-to-end delay and packet delivery ratio performances were achieved
Summary
Vehicular ad hoc network (VANET) is an application of the Internet of Things (IoT) in the automotive field, providing driving safety and comfort [1]. The high number of relays poses risk to the successful delivery of information as vehicles are highly mobile and established links between vehicles can be broken quickly To combat this problem, existing research works usually adopt the way of sacrificing the network capacity and bandwidth resources to improve network connectivity [2]. In a VANET, the mobility of vehicles is restricted to predefined paths (i.e., roads) and speeds These restrictions can provide useful information to make prediction on link duration. We propose an efficient prediction-based data forwarding strategy to strike a balance between the reliability and efficiency of data transmission in VANETs. Based on the vehicle speed and location information carried in the periodic information packets for the conventional intervehicle interaction, our scheme predicts the duration of a link between two vehicles where packet forwarding remains robust.
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