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A position base routing protocol for vehicular ad-hoc network (VANET) is challenging task due to rapidly changing topology and frequent path disconnection problem in network and safety application. Also a position base routing protocol for vehicular ad-hoc network is propose to ensure connectivity of route with more successfully delivered packet. Consider both cars and buses as vehicular nodes running...
Vehicular Ad Hoc Networks (VANET) are key to realizing Intelligent Transportation Systems (ITS). Although VANETs belong to the class of Mobile Ad Hoc Networks (MANET), and there are numerous routing protocols for MANETs, none of these protocols are applicable for VANETs. In particular, VANETs are highly dynamic due to high speed mobility of vehicles and traditional routing algorithms for MANETs cannot...
This paper analyzes the information delivery delay for roadside unit deployment in an intermittently connected vehicular network. An analytical model is developed to describe the relationship between the average information delivery delay and the distance between two neighbor RSUs deployed along a road. The derived model considers a straight highway scenario where two RSUs are deployed at a distance...
In recent years, many routing protocols have been proposed to enable infotainment applications for urban VANET. These schemes deploy greedy-based techniques that rely on various routing metrics (e.g., driving distance, road segment connectivity, or number of hops) to meet the requirements of the aforementioned applications, i.e., low end-to-end delay and high throughput. Yet, most of these protocols...
In Vehicular Ad-hoc NETwork (VANET), network performances represented by connectivity and/or throughput are much influenced by mobility patterns and densities, of vehicles. In order to improve network performance even if the density of vehicles is low, A method named Parked Vehicle Assistance (PVA) has been proposed[1]. PVA method improves network densities by introducing vehicle which is parking...
Vehicular ad hoc networks (VANETs) support safety applications to prevent car accidents. Beacons are periodically broadcasted for various safety applications but very sensitive to collision and delay. In this paper, we propose a new transmission scheme, called Bi-Beacon, which transmits two levels of power to reduce collision and maintain maximum transmission range. High collision problem still remains...
With the recent new paradigm for the future Internet named data networking (NDN), contents are searched by names and not by address, and any node storing a content can also act as a source of information. Such a paradigm appears to be of particular interest for vehicular ad hoc networks (VANETs), to extend internet services to vehicles and support new mobile applications. In VANETs, devices not only...
The active safe driving application offers real-time video streaming services and real-time emergency messages (EMs) to improve the driving safety in intelligent transportation systems (ITS). As the required (or shared) video and EM quality increasing, the constraints of packet delay, packet loss rate and the required bandwidth of packet transmissions become critically in Vehicular Ad-hoc NETwork...
The vehicular Ad hoc network is new emerging technology to enhance traffic safety and comfort for automotive users. Most of the safety applications in this field need real time information with high reliability and in time delivery. In dense network a large number of vehicles nodes disseminate the messages to all accessible nodes with high frequency and control channels will be easily congested and...
The message propagation with low delay becomes a fundamental challenge in VANET. The vehicle Ad hoc networks are a very appealing solution for many safety applications like assistance driver, warning about collision of vehicle, warning of distance between vehicles, cooperation during driving and control for cruise cooperation. To operate these application the vehicles are fitted with those equipments...
In this paper, based on an in-depth analysis of Geographical Routing Protocol (GRP), especially its next hop selection, we present an improvement for the strategy of next hop selection with a joint consideration of distance factor and hierarchical quadrant. Based on the next hop selection strategy, an Improved Geographic Routing Protocol (IGRP) has also been proposed in this paper, which has a higher...
In existing trust establishment researches, the decision making accuracy and decision delay of received event message are both the outstanding problems in VANETs. Especially on the decision delay, the delay of alert event might lead to traffic accident and injury. In this paper, we propose an adaptive decision making model which can make decision quickly by the effective and quick assistance of the...
n this paper, we propose a statistical channel model for decode-and-forward relaying vehicular ad hoc networks (VANETs) with single-input-single-output (SISO) antennas. The proposed model uses a sum-of-sinusoids (SoS) Rician model, which is derived for highway scenarios with line-of-sight (LOS) components, time varying conditions and multipath excess delay. Since the time delay differences between...
Emergency warning applications in a vehicular ad hoc network (VANET) requires successful dissemination of warning notification within a geographical area spanning multiple hops. Multimedia transmission provides an accurate overview of the emergency event in the form of an image, an audio or a video. However, the reliable transmission of emergency multimedia messages using multi-hop broadcast techniques...
Vehicular ad hoc network(VANET) is increasingly studied recently due to its promising benefits to the urban life. The roadside unit(RSU) is one of the most important components for VANET. An effective deployment of RSUs will enhance the efficiency of the data delivery in VANET. In this paper, we propose to address the RSU deployment problem by formulating it as a mobility clustering problem. We adopt...
As a special type of mobile ad hoc networks (MANETs), vehicular ad hoc networks (VANETs) are expected to support vehicle to vehicle communication and vehicle to infrastructure communication. The conventional relay selection scheme proposed for MANETs may perform poorly in VANETs due to the unique characteristics of VANETs, including highly dynamic network topology, unstable link status and multiple...
Information dissemination in vehicular networks is becoming a hot topic of research in the field of Vehicle-to-Vehicle (V2V) communications, since efficient data exchange is needed for most crucial applications (road accident warning, traffic congestion warning …). Many protocols have been then proposed for the sake of disseminating information with high reachability and low end-to-end delay in limited...
Cooperative downloading is an important measure for increasing the amount of data downloaded to the users of Vehicular Networking (VANET). However, data exchange causes frequent collision among cooperative vehicles and the client. To solve the problem, in this paper, we propose a transmission scheduling method. Firstly, the method builds a k-constraint routing tree according to the amount of linked...
The rapid evolution of wireless communication capabilities and vehicular technology would allow traffic data to be collected and disseminated by travelling vehicles in the near future. Vehicular Ad hoc Networks (VANETs) are self-organizing networks that can support different types of traffic information systems without requiring fixed infrastructure or centralized administration. Since traffic data...
In vehicular ad hoc networks (VANETs), multi-hop broadcast protocols are required for many applications including driver assistance systems. However, providing a low end-to-end latency has been very challenging. In this paper, we propose a protocol which can provide a fast channel access for broadcast traffic flows in VANETs. The protocol introduces new control messages to reserve time slots for the...
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