Abstract
Vehicular Ad Hoc Networks (VANETs) are considered by car manufacturers and the research community as the enabling technology to radically improve the safety, efficiency and comfort of everyday driving. However, before VANET technology can fulfill all its expected potential, several difficulties must be addressed. One key issue arising when working with VANETs is the complexity of the networking protocols compared to those used by traditional infrastructure networks. Therefore, proper design of the routing strategy becomes a main issue for the effective deployment of VANETs. In this paper, a reliable freestanding position-based routing algorithm (FPBR) for highway scenarios is proposed. For this scenario, several important issues such as the high mobility of vehicles and the propagation conditions may affect the performance of the routing strategy. These constraints have only been partially addressed in previous proposals. In contrast, the design approach used for developing FPBR considered the constraints imposed by a highway scenario and implements mechanisms to overcome them. FPBR performance is compared to one of the leading protocols for highway scenarios. Performance metrics show that FPBR yields similar results when considering freespace propagation conditions, and outperforms the leading protocol when considering a realistic highway path loss model.
Highlights
In the context of Intelligent Transport Systems (ITS), Vehicular Ad Hoc Networks (VANETs) are considered the key technology required to radically improve safety [1,2]
Subsection 4.4.2 presents the metrics obtained when considering the radio propagation model explicitly developed for highway scenarios introduced in [37]
The performance of Freestanding Position Based Routing (FPBR) was compared with the performance shown by the Destination Discovery Oriented Routing (DDOR) protocol, which is one of the few protocols explicitly developed for V2V communications in highway scenarios
Summary
In the context of Intelligent Transport Systems (ITS), Vehicular Ad Hoc Networks (VANETs) are considered the key technology required to radically improve safety [1,2]. The routing protocol must deal with the constraints imposed by the high mobility of vehicles Constrains such as mobility patterns, fading wireless channel, density of vehicles and the availability of infrastructure are closely related to the specific deployment scenario, i.e., highway or urban [26,37]. The specific application scenario should be considered when designing a routing strategy in order to adequately address the particular constraints imposed by a given scenario In this context, it is important to note that highways account for a significant amount of the road infrastructure deployed throughout several countries. Other important constraints pertaining to this application scenario are considered within the routing algorithm design including: dynamic transmission ranges, vehicle acceleration, and high vehicle mobility.
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