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Many applications and protocols are planned for the so-called Intelligent Transportation Systems (ITS). Most of them are supposed to work in dynamic networks, such as the vehicular ad hoc networks (VANET). However, designing and studying distributed applications and protocols in such networks is not easy. Analytical studies suffer from the lack of pertinent models. Simulations are often far from reality...
Efficient dissemination of messages in a vehicular ad hoc network (VANET) still face many challenges in the current research scenario. This paper addresses the problem of redundant forwarding of messages that occur during broadcast and proposes an adaptive forwarding mechanism which controls the amount of redundant messages thereby improving message dissemination over a VANET. The mechanism will enable...
The implementation of Safety of Life (SoL) services in transportation systems, e.g. for applications like collision avoidance of vehicles, requires reliable and instantaneous information exchange. In this paper we present the design of an infrastructure-less ad-hoc inter-vehicle communication system that fulfills these requirements with respect to the boundary conditions in the railway environment,...
A car fleet is a group of cars that should travel close together at a common speed. Due to dynamic road conditions, traffic signals, road speed limits and other factors, a car fleet may suffer from frequent partition. This paper proposes a distributed cohesive car fleet maintenance scheme by employing a swarming model complemented by a small world phenomenon. Vehicles within a car fleet are classified...
Vehicular networks are drawing a great attention from the research community and the automotive industry, where they are beneficial in providing ITS (Intelligent Transportation System) services as well as assisting the drivers on the road. In this context, vehicular networks are based on V2I (Vehicle to Infrastructure) and V2V (Vehicle to Vehicle) communications. The special characteristics of these...
Vehicular ad-hoc networks (VANET) are a mobile adhoc networking technology to facilitate vehicle-to-vehicle and vehicle-to-roadside communication. A vehicle in VANET is considered to be an intelligent mobile node capable of communicating with its neighbors and other vehicles in the network. As in a mobile ad-hoc network (MANET) it is necessary to identify or address each vehicle in the vehicular ad-hoc...
Traffic congestion on major roadways costs our nation billions of dollars in lost earnings, wasted fuel consumption, injury and loss of human life. Providing motorists with real time roadway conditions is essential to mitigating traffic congestion. We propose a novel real-time messaging system that can be used to communicate imminent traffic conditions to motorists. Having such information can allow...
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