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Vehicular Ad-hoc Network, VANET, offers new opportunities for better road traffic management. Using vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communications, several research works were published on road traffic improvement in general and at road intersection in particular. One of the challenging problems is to minimize vehicles' waiting time at the intersection as well optimize...
Simulation of Vehicular Ad Hoc Networks (VANET) plays an crucial role on design and development of VANET including routing algorithms, mobility management and so on. In the paper, the SVNRCS system is presented to simulate VANET in realistic scenes. Its vehicle distribution and movement model are based on realistic GPS data. Thus it can simulate more real VANET environment. The architecture and implementation...
In Vehicular Ad Hoc Networks (VANETs), the major communication challenge lies in very poor connectivity, which can be caused by sparse or unbalanced traffic. Deploying supporting infrastructure could relieve this problem, but it often requires a large amount of investment and elaborate design, especially at the city scale. In this paper, we propose the idea of Parked Vehicle Assistance (PVA), which...
Information sharing among vehicles is an emergent issue in Vehicular Ad Hoc Networks (VANETs). Considering the mobility and limited connectivity of the nodes in a typical VANET, designing scalable schemes for information sharing is challenging. In this paper, we propose a distributed peer-to-peer (P2P) based architecture for information sharing in VANETs. We split the entire vehicular network into...
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...
Epidemic or gossip-based algorithms have been proposed for data dissemination in vehicular networks. Due to the unfeasibility of deploying large size vehicular networks, the performance evaluation of these algorithms is usually based on simulations. However, most literature works present experimental results based on hyper-simplified and non-realistic mobility scenarios or do not adequately describe...
Connectivity analysis of Vehicular Ad Hoc Networks (VANETs) involves the study of static and dynamic characteristics of the network. Realistic mobility models are essential for both aspects, in order to produce valid configurations of the position of vehicles in one static instant, and to dynamically move such vehicles in an interval of time. Focusing on static connectivity evaluation, we extend the...
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...
VANET is an ad hoc network composed of highly mobile vehicle nodes. Many routing protocols utilize traffic information as a critical metric for determining optimal message forwarding path. The existing traffic information systems are not suitable for routing decision either because of the huge development and maintenance cost or due to the insufficient information provision. In this paper, a new distributed...
VANET is a special case of MANET, and will play an important role in city road traffic control. The application of VANET to city road traffic control was studied. The feasibility of VANET was justified, the city section mobility model was appended in NS2, the network model of VANET was established, the simulation scene was compiled, the performances of DSDV, DSR, two classical routing protocols of...
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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