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Being a subclass of mobile ad hoc networks (MANETs), vehicular ad hoc networks (VANETs) have received considerable attention in recent years. Existing routing protocols of MANETs do not perform well for VANETs due to many different characteristics such as, fast moving nodes and frequent disconnections in the network. We present a context-aware hierarchical routing protocol based on road connectivity...
Vehicular ad hoc networks (VANET) have attracted considerable attentions in recent times for promising applications like vehicular safety, traffic monitoring, etc. Due to fast topological change and frequent network disruption, multihop data dissemination is an important issue. In this paper, we propose a greedy intersection-based optimal routing protocol, in which we formulate the data forwarding...
Geographic routing protocols have been developed for efficient V2V and V2I communications in vehicular ad hoc networks (VANETs). Existing approaches tackle challenges in urban environments such as dynamic vehicular network topology. However, in more realistic urban environments, vehicular networks are highly dynamic due to the complicated road topology and vehicular mobility, as well as shadowing...
Greedy forwarding is widely adopted in geographic routing protocols for VANETs since it selects the neighbor that is geographically closer to the destination as the next hop and is considered efficient. Because of the highly dynamic network topology and various impairment of radio signal, the link chosen according to the greedy algorithm regardless of the link state is unstable to a large extent,...
Geographic routing in Vehicular Sensor Networks (VSNs) has been considered as an efficient and scalable approach since it exploits location information instead of topology information to route data packets. Geographic routing requires sources to be aware of the location information of destinations. Many solutions have been proposed to provide the location information of destinations in ad hoc and...
In the near future vehicular networks (VANETs) based on wireless technology will be part of our daily lives. VANETs enable vehicles that are not necessarily within the same transmission range to communicate with each other. They also allow vehicles to connect to Roadside Units (RSUs), which are connected to the Internet, forming a backbone mesh that offers the capability of communicating with each...
One of the key aspects of any communication system is routing of packets. VANET is no exception and poses special challenges in routing techniques. Position based routing protocols are considered to be apt for vehicular networks [1] and to realize that a location service is being used. For a packet to be routed to a destination across the network, the destination's position is to be known in advance...
The routing of data in inter-vehicle communication technologies has obtained tremendous amount of researchers' attention during the last few years. Many routing protocols utilize vehicular traffic information as a metric to determine optimal routing paths to transmit data in vehicular environment. Due to the difficulty as well as the enormous deployment costs of static nodes and the arduous effort...
Routing remains one of the key challenges in vehicular networks due to their special properties such as the high mobility and the intermittent connectivity. Almost all the efficient routing solutions proposed for VANETs are based on geographic information provided by the navigation systems widely deployed in the new generation of vehicles. Typically, in these position-based protocols, a source node...
Vehicular networks have recently attracted great interest in the research community, and multihop data dissemination has become an important issue. To improve data-delivery performance, we propose deploying static nodes at road intersections to help relay data. In this paper, we present SADV, which is a static-node assisted adaptive data-dissemination protocol for vehicular networks. With the assistance...
In vehicular ad hoc networks (VANETs), routing schemes play a vital role in data dissemination. As data dissemination in a timely and efficient manner is critical for safety-related applications, in this paper we introduce a location based routing algorithm namely geographic routing, which significantly reduces the packet dropping probability and the total number of packets in the network compared...
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