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In this paper, we present analytical models to study the packets delivery probability on intersections for VANETs(Vehicular ad hoc networks) in city scenarios. These models can help better understand data propagation in this environment. We show that the delivery probability is strongly related to the traffic conditions of the road where the information is to be transmitted. We also validate our analytical...
The vehicular ad hoc network (VANET) is an emerging new technology. Developing multi-hop routing protocols for urban VANETs is a challenging task due to many factors such as frequent network disconnections. Many VANET routing protocols use a carry-and-forward mechanism to deal with the challenge. However, this mechanism introduces a large packet delay, which might be unacceptable for some applications...
The routing paths of vehicular ad-hoc network (VANET) in a city environment consists of many possible paths and junctions. Shortest path routing is not viable because each path has to be populated with vehicles. A scalable multi-hop routing protocol which adapts well to the city environment even with rapidly changing network topologies and lots of disconnected, sparse and dense network conditions...
Multihop data delivery in vehicular ad hoc networks (VANETs) suffers from the fact that vehicles are highly mobile and inter-vehicle links are frequently disconnected. In this paper, we propose a multihop vehicle-to-infrastructure routing protocol named Vertex-Based Predictive Greedy Routing (VPGR), which predicts a sequence of valid vertices (or junctions) from a source vehicle to fixed infrastructure...
The network topology of vehicular ad-hoc network (VANET) in a city environment consists of many possible paths and junctions that forms the routing paths. Shortest path routing is not viable because each path has to be populated with vehicles. A scalable multi-hop routing protocol that adapts well to the city environment even with rapidly changing network topologies and lots of disconnected and dense...
Thanks to the advances in wireless technologies, mobile vehicular networks are likely to become the most relevant form of mobile ad hoc networks (MANET). Vehicular communication which facilitates the exchange of information between vehicles is the prerequisite not only for extending the access to Internet while on the road, but also to cater for special applications such as of road traffic and travel...
Routing is crucial to the success of VANET applications, which is complicated by the fact that VANETs are highly mobile, and sometimes partitioned. This paper proposes a contention based routing protocol for VANETs in city environments. Different from the position based routing, this protocol does not require the node to maintain its neighborspsila locations. Junctions through which a packet must...
The vehicular ad hoc network (VANET) is an emerging new technology and is a promising approach for the intelligent transportation system (ITS). In comfort and safety applications, a vehicle may need to query data from another vehicle via multihop communications. Data routing in the VANET environment suffers from frequent disconnections due to high mobility and sparsely connected networks. Data delivery...
Routing plays important role in VANET applications but due to rapidly changing topology and high speed mobility of vehicles, conventional routing protocols suffer heavily. Current MANET routing protocols fail to fulfill these needs. In this paper we propose a VANET routing protocol that is especially designed for city environments. It consists of two parts: (1) Selection of next junction dynamically...
In last decade intelligent transportation systems (ITS) and vehicular ad hoc network (VANET) became one of the most active and emerging fields of research. It is expected that this technology will bring revolutionary changes in transportation system and offer various services to make journey safer, secured, and more comfortable. In the meantime, US FCC allocated a block of frequency spectrum (popularly...
Road traffic problems are growing nowadays because of the sharp increase in the number of vehicles on the road. This can directly affect the traffic flow and create congestion points which in turn can cause car accidents. However, road density in terms of number of cars may represent an opportunity to facilitate inter-vehicular communication and optimize packet routing in a vehicular adhoc network...
The emergence of vehicular ad-hoc network (VANET) through inter-vehicle communications (IVC) has promised countless applications that could greatly improve the safety of drivers, ease traffic control and enhance the overall driving experience in the near future. Successful implementations of VANET would require standardized network protocols, secure communication platforms, reasonable coverage of...
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