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In urban vehicular network, existing routing protocols using beacon message scheme and P2P (peer to peer) density discovery scheme can hardly make a good performance as well as keep a high feasibility. This paper proposes an IGOR (improved geography and overlay routing) in urban vehicular environment. In IGOR, RSUs (road side units) are introduced to support the road density discovery. A passive neighbor...
The Intelligent Transportation Systems (ITS) currently attract a lot of attention. Many simulators and some testbeds have been proposed to validate new ideas and to guide new theoretical developments. Yet, to this date, simulator tools and testbeds evolve in disjoint research work. We developed Airplug-ns, an open source simulation environment, as a step towards bridging this gap. This environment...
IEEE 802.11p is an emerging standard intended to support wireless access in the vehicular environment and to deliver both safety and non-safety applications to vehicles on the roads. Despite the massive research effort related to the design of reliable and timely schemes for dissemination of safety messages, only a few works have investigated on-the-road delivery of non-safety data traffic, such as...
This paper introduces P2P communication across a VANET and seeks to establish under what conditions (mobility, network size, wireless channel) data streaming is feasible. Routing of streamed services over multiple hops and multiple paths may result in significant packet losses, resulting in unacceptable quality of service. This paper examines the impact of differing traffic densities and different...
Vehicular networks are gaining popularity because vehicular communications are able to help minimize accidents, improve traffic conditions and provide infotainment services. Security and privacy are important challenges in the deployment of vehicular networks. Authentication, key exchange and pseudonym delivery protocols can be used to provide security and privacy in vehicular networks. However, two...
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...
In this paper we introduce a novel security architecture and security mechanisms for vehicular networks environments. Our approach provides a layer-2 multi-hop authentication and credential delivery scheme between vehicles and the network operator authentication server. We analyze the performance of the proposed solution through extensive simulations, showing the success of our scheme (compared to...
InVeTraS (intelligent vehicular transportation system) is proposed as a vehicle-to-vehicle (V2V) anti-collision mechanism that determines, estimates and absolves collision courses between two or more vehicles based on a correlative and cooperative wireless networking concept. The problem of collision avoidance is abstracted to the generic problem of location awareness and subsequent periodic information...
Vehicular networks (VNs) are emerging, among civilian applications, as a convincing instantiation of the mobile networking technology. However, security is a critical factor and a significant challenge to be met. Misbehaving or faulty network nodes have to be detected and prevented from disrupting network operation, a problem particularly hard to address in the life-critical VN environment. Existing...
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