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Vehicular Ad hoc Networks (VANETs) have gained considerable attention in recent years because of the extensive applications. However, VANETs are confronted with numerous difficulties and challenges, which lead to communication performance degradation and even data delivery failure. In this paper, we propose a new routing protocol called Intersection-based Delay sensitive Routing using Ant colony optimization...
Disruptions, high dynamism and no end-to-end communication are some of the Vehicular Delay-Tolerant Networks (VDTNs) main characteristics. This paper describes the implementation of a new VDTN multicast routing protocol which makes use of knowledge about previous encounters to estimate congestion and density and better spread data bundles and limit the number of copies to reduce overhead. After a...
This paper analyses the performance of a new routing protocol for vehicular delay-tolerant networks, called GeoSpray. This geographic routing protocol performs a store-carry-and-forward, combining replication and forwarding/ routing decisions based on location information, with explicit delivery acknowledgments to improve network resources utilization. The performance of the proposed routing protocol...
The rapid development of the wireless communications lets more and more people are used to access network services via various wireless technologies. Users expect the ubiquitous network environments to acquire information they needed anytime and anywhere. How to provide an efficient routing protocol is one of major challenges in VANETs to improve the performance in terms of packet delivery ratio,...
This paper presents a Priority based Routing Protocol (PRP) in Vehicular Ad hoc Network (VANET), according to message types. We focus mainly on a safety messaging application for safe driving in distributed environment, i.e., ad hoc manner. Broadcast based routing protocol is proposed along with priority and position enhancement to provide i) fully distributed routing protocol, ii) different quality...
The Vehicular Ad hoc Network (VANET), a subset of Mobile Ad hoc Network, is used in many applications such as assisting driver with signage, road traffic reporting, telling the way, etc. Since VANET has highly dynamic topology and various vehicle densities, developing a routing protocol that can satisfy above applications requirements is a great challenge. In this paper, we present an efficient Road...
It is being envisaged that a wide variety of applications can be running on vehicular ad hoc networks (VANETs) in the near future. The coexistence of these applications suggests that they will be competing for the use of the wireless medium. That easily leads to severe congestion and even “hotspot” problem in high traffic density urban areas, and results in the failure of time-critical applications...
A Vehicular Ad Hoc Network (VANET) not only experiences highly mobile and frequently disconnected, but may also have to deal with rapid changes of network topologies, especially when accidents and road traffic jams happen. In this paper, we propose a novel approach to address this issue. Due to the intermittent connectivity in VANET, we adopt the idea of carry and forward, where a moving vehicle carries...
The vehicular wireless ad hoc network (VANET), a specialized wireless sensor network, is booming to provide safety and comfort for passengers. Special features of VANET, such as high mobility nodes and large scale node population, make the Quality of Service (QoS) task extremely challenging. To provide Quality of Service (QoS) to traffic safety and entertainment applications in VANET, we propose a...
Recently, vehicular sensor networks (VSNs) have emerged as a new wireless sensor network paradigm that is envisioned to revolutionize driving experiences and traffic control systems. Many existing routing protocols for VSNs have good performance on data routing in a city environment. In this paper, we propose a traffic control aware routing for VSNs, which is called PUT. It considers two modules of...
In VANETs, the carry-and-forward strategy had been adopted to overcome uneven distribution of vehicles. If next vehicle located in the transmission range, the vehicle forwards packets; otherwise carries packets until meeting. The carry is almost occurring in sparse traffic road segment, and long carry distance has long end-to-end packet delay. Likewise the dense condition also could have long delay,...
Vehicular Ad Hoc network (VANET), is a hot topic that applying mobile Ad Hoc network (MANET) to ITS in recent years. Special environments and applications cause difficulties to the design of the routing protocols of VANET which can not use the exiting protocols well. Firstly, this paper introduces some concepts of VANET briefly, analyzes and compares some different kinds of existing routing protocols...
In this paper, we present the VD4 model for effective delivery of data packets in vehicular ad hoc networks. The major challenges in such networks are disconnections, high mobility and resource poor environment. For providing data delivery under such constraints we adopt the method of carry and forward in which a vehicle transfers its data to another vehicle if it is moving towards the destination...
An ad hoc network is a kind of wireless network without centralized administration or fixed network infrastructure, in which nodes perform routing discovery and routing maintenance in a self-organized way. Currently, many people focus on the routing protocol in ad hoc networks. But few people research how to detect the validity of the data fusing without large communication overhead. In this paper,...
Providing Internet access on buses allow people to read news, check emails, watch sport games, and hence can greatly improve the quality of people's life. This paper proposes an adaptive routing protocol, called R-BUS for a bus network. R-BUS selects a route based on the link's lifetime and its communication signal quality. The protocol takes the bus mobility and the radio propagation model into account...
Due to the rapidly changing topology of vehicular ad hoc network (VANET), it requires the routing protocol can be able to find out comparatively more stable routes. But the routing protocols in existence are not taking the distinguishing features of vehicles and roadway into consideration, and this brought about challenges to these routing protocols' applicability in VANET. In this paper, we take...
Rapid advancement in wireless communication has made it possible to develop vehicular ad hoc networks, in which a vehicle can communicate with other vehicles via a wireless, multi-hop fashion. A variety of appealing real-world applications can be enabled by VANETs, such as driving safety and urban monitoring. Many location based routing algorithms have been proposed for data delivery in VANETs. Most...
Vehicular ad hoc network in a highway is composed of high speed vehicles or nodes which induce fast topology changes in their configuration. In order to solve the connectivity and scalability problems of VANETs, we introduce the architecture of a vehicular hybrid ad hoc network (VHANET). Using some routing protocol extensions, the VHANET allows ad hoc islands to be interconnected among each other...
Communication of vehicle information to neighbor vehicles is an important factor for safe driving systems in intelligent transport system. Additionally, big-size vehicles on the real road environments may interrupt communication between vehicles. Therefore, an adequate vehicle should forward the vehicle information in the delivery of the vehicle information to neighbor vehicles. This paper proposes...
Developing routing protocol for vehicular ad hoc networks (VANET) is a challenging task due to potentially large network sizes, rapidly changing topology and frequent network disconnections, which can cause failure or inefficiency in traditional ad hoc routing protocols. We propose an adaptive connectivity aware routing (ACAR) protocol that addresses these problems by adaptively selecting an optimal...
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