The impact of inter-vehicle communication on vehicular traffic

The work addresses communication networks established over radio equipped vehicles in our everyday road traffic, so called Vehicular Ad Hoc Networks (VANETs), and discusses their impact on two major goals, namely traffic safety and traffic efficiency. For both objectives, the thesis proposes an appropriate modeling of the essential building blocks Traffic, Communication and Application and enables impact assessment studies by means of implemented simulation tools

The impact of inter-vehicle communication on vehicular traffic

The work addresses communication networks established over radio equipped vehicles in our everyday road traffic, so called Vehicular Ad Hoc Networks (VANETs), and discusses their impact on two major goals, namely traffic safety and traffic efficiency. For both objectives, the thesis proposes an appropriate modeling of the essential building blocks Traffic, Communication and Application and enables impact assessment studies by means of implemented simulation tools

Supporting Security in an Electronic Market System on the Base of Web Services

Abstract. Security is a precondition for the success of an electronic market system. Unless the system is able to provide some mechanism to ensure authentication, authorization, and secure data transmission, the system will have problems to be accepted by both customers and providers. In this paper, we will discuss some ideas how to add security to a distributed electronic market system that is designed platform-independently on the base of web services. We will show how we have implemented these ideas in a system for an electronic market for scientific literature

A COMPREHENSIVE SIMULATION TOOL SET FOR COOPERATIVE SYSTEMS

PRE-DRIVE C2X is a project funded within the 7th Framework Programme of the EU to support the development and introduction of cooperative systems. One major part of this work is the creation of a comprehensive tool set of simulation models integrating all fields of expertise involved. The objective is to create, test and apply an integrated simulation tool set that allows to simulate and evaluate the interaction between vehicle traffic, vehicular communication and co-operative applications. Each of these three areas is treated by dedicated models. Additionally the environmental effects are modelled by a separate modelling approach with detailed algorithms for vehicle dynamics and engine behaviour. The process to arrive at such a model combination from user requirements over pre-existing know-how and other significant steps are described as well as the current status of the work