Abstract
In Vehicular Ad Hoc Networks (VANETs), geographic routing protocols rely on a greedy strategy for hop by hop packet forwarding by selecting vehicle closest to the destination as the next hop forwarding node. However, in a high-mobility network such as VANET, the greedy forwarding strategy may lead to packet transmission failure since it does not consider the reliability of the newly formed link when next hop forwarding nodes are chosen. In this paper, we propose a scheme for next hop selection in VANETs that takes into account the residual lifetime of the communication links. In the proposed approach, a source vehicle selects a forwarding vehicle from a given set of candidate vehicles by estimating the residual lifetime of the corresponding links and finding the link with maximum residual lifetime. Initially, we present Kalman filter based approach for estimating the link residual lifetime in VANETs. We then present the details of the proposed next hop selection method. Simulation results show that the proposed scheme exhibits better performance in terms of packet delivery ratio and average end-to-end delay as compared to other conventional method.
Highlights
Vehicular Ad Hoc Networks (VANETs), an integral component of intelligent transportation systems (ITS), are aimed to provide support for road safety, traffic management and comfort applications by enabling communication in two distinct modes: vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) [1]
3.3 Next-hop selection based on link residual lifetime In this subsection, we describe the proposed method for next-hop selection that relies on the prediction algorithm discussed previously
We have described a method for the prediction of residual lifetime using Kalman filter
Summary
Vehicular Ad Hoc Networks (VANETs), an integral component of intelligent transportation systems (ITS), are aimed to provide support for road safety, traffic management and comfort applications by enabling communication in two distinct modes: vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) [1]. VANETs are poised to support critical road safety related applications in a highly dynamic environment, communication reliability along the end-to-end route is of prime importance as compared to other design criterion such as the number of hops along the route, as investigated in [20] It is desirable for the routing protocol to consider link reliability when vehicles are chosen for forwarding the packet. We propose a method for the selection of reliable one-hop neighbor based on the residual lifetime of the corresponding communication link To meet this objective, we present an algorithm to predict the residual lifetime of links in VANETs by making use of Kalman filter based prediction technique. Due to the simplicity and robust nature of the Kalman filter, they are extensively used for velocity and location prediction techniques in ad hoc networks [23,24,25]
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