Research on data forwarding algorithm based on link quality in vehicular Ad Hoc networks

Abstract

Vehicular ad hoc networks (VANETs) realize remote data transmission via multi-hop communications. However, high relative vehicle mobility and frequent changes of the network topology inflict new problems on forwarding data in time. As a result, the robustness of the link is crucial to VANETs. In this paper, we present an efficient routing algorithm based on link quality named DFLQ. Firstly, we determine the range of forwarding according to the traffic density and the vehicle route. Then, we can compute the time of link maintaining on the basis of the position, speed and direction of the nodes. Also, we can estimate the quality of wireless channel based on the expected transmission count. Finally, the longest link maintenance time is chosen as the relay node to forward the data. Simulation results validate that the DFLQ improves packet delivery rate, reduces end-to-end delay and network overhead to a certain extent.