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Efficiency applications in VANETs are focused on increasing the productivity of the road resources by managing the traffic flow and monitoring the road conditions. The performance of most such applications is dependent on an effective density estimation of the vehicles in the surroundings. Of the various methods, clustering demonstrates to be an effective concept to implement this. However due to...
In urban scenarios traffic signal controls are the main mechanism to control vehicular flow at the intersections. However, traditional systems fail to adjust the timing pattern in accordance to the time variability. An alternative to such systems is to develop dynamic systems which will alter the timing patterns according to the traffic demand. In this paper, an adaptive traffic signal control system...
In this paper we propose a direction based clustering algorithm to disseminate the information amongst vehicles. This protocol can be used to realize efficiency applications in VANETs such as adaptive traffic signal control by estimating the density of vehicles on a given road. C-DRIVE uses the direction of the vehicle to optimize the data dissemination during the formation of the clusters and hence...
Deploying inter-vehicular applications is a challenging task due to the high mobility and the dynamic topology changes. These characteristics cause frequent network disconnections and drastically reduce the efficiency of traditional ad hoc routing protocols. To address this issue, we introduce a new routing approach called “Road Connectivity-based Routing for VANETs” (RCBR) that improves routing performance...
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...
The routing problem in Intelligent Transportation Systems is one of the main objectives of TRAFIC project. TRAFIC is a research and industrial initiative which aims to contribute to the global academic and industry effort in this area. In this paper, we focus on TRAFIC Efficient Routing approach proposed as a solution for end-to-end routing problem to support V2V and V2I communications.
The term Intelligent Transport System generally refers to a system that manages road traffic using information and communication technologies. One of the most important parts of it is the vehicle detection which provides vehicular data such as volume, density, and speed. This paper proposes a vehicle detection method which measures volume and speed using vehicle-to-infrastructure communication and...
In this paper, we introduce a new geographic routing scheme for urban vehicular environments called ??Dynamic Road Connectivity-based Routing?? (D-RCBR). The proposed approach exploits distributed information about road connectivity and vehicles distribution to optimize routing decisions. To ensure the packet delivery, D-RCBR defines a new concept of Road Connectivity that provides local topology...
Vehicular ad hoc networks (VANETs) are important component for the development of Intelligent Transportation System. Due to the features of VANET, data dissemination is an important issue that has to be addressed. In this paper we propose a direction based clustering algorithm for data dissemination. This protocol is used to estimate the density of vehicles on a given road. As in any clustering algorithm,...
The location service is an important component of position-based routing protocols, used for VANETs. A hierarchical structured location service called map based location service (MBLS) is proposed in this paper. The MBLS exploits navigation system by using geographical data file (GDF) from the digital-map database to recruit location servers and to send location updates. Simulation results show that...
In transportation, the path finding problem is usually defined as the shortest path (SP) problem in deterministic terms (distance, deterministic cost, etc.). However, in real life situation, many information are uncertainty (travel time, travel cost or combination of criteria). In this paper we present a formulation for the multi-objective paths problem in dynamic and stochastic networks. In order...
In this paper, we describe a new route discovery technique known as scalable routing technique. This technique enhances the performance of the routing protocol density aware routing using road hierarchy (DAR-RH), which involves a route discovery procedure using Dijkstra algorithm before transferring data from source to destination. When DAR-RH is used in large road network scenarios the time complexity...
In this paper, we present a novel security solution known as global public key algorithm based on bilinear pairing cryptography concept, for location service in vehicular ad-hoc networks (VANETs). Indeed, many geographic routing protocols used in VANET need location service for obtaining destination position. The location service makes way for major security concern in VANETs. We design an efficient...
Intervehicular communication (or vehicular adhoc networks, VANET) mirrors as one of the emerging technologies for road safety and comfort applications. However the use of this technology is limited due to the lack of an efficient routing protocol. In this paper we propose density aware routing using road hierarchy (DAR-RH) which is based on realistic road topology. DAR-RH exploits the available road...
This paper gives an overview of the current research that we are carrying out on intelligent transportation system (ITS). Through our work, we intend to propose hybrid architecture for vehicular communication providing safety and non-safety services for mobile users. The proposed architecture will use the existing wireless technologies to assure the transfer of security messages in the vehicular network...
The modification of the well known GPSR routing protocol, with the concept of lifetime is proposed. The lifetime is calculated between the node and each of its neighbors. A lifetime timer is set to the lifetime value. This timer helps in determining the quality of link and duration of the neighbor??s existence. During the next hop selection process, the node selects the neighbor which is closest to...
A two level QoS architecture for network mobility is proposed. At the transport layer the Mobile Stream Controlled Transport Protocol (MSCTP) is modified by assigning priorities to multiple streams in a MSCTP association. The performance of the protocol is further improved at the interface level by modifying the existing Concurrent Multipath Transfer (CMT) implementation of SCTP. The data from the...
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