| In this dissertation Vehicular Ad-Hoc Networks (VANETs) were studied. VANETs form a specific type of wireless ad-hoc networks, consisting of On-Board Units (OBUs) in vehicles and Road Side Units (RSUs) at the wayside, for example in road infrastructure like traffic lights. High mobility and frequent topology changes pose a big challenge on the efficiency of routing algorithms. Several routing protocols have been developed during the research leading to this dissertation, both for highway and urban scenarios. The protocols were tested in a simulation study and it was shown that the developed Multi-Hop Compass Routing protocol functions well in both cases.;Besides routing, also scalability of the beaconing mechanism of these protocols has been investigated, ensuring that the network can still function properly when there is e.g. a traffic jam. A solution for the scalability has been implemented, based on the Multi-Hop Compass Routing protocol. It became clear that it suffices to have only a few nodes participating actively in the network, while other nodes just listen and if necessary transmit messages, as long as network connectivity is guaranteed.;Before one can transmit information, one needs a way to address nodes and parts in the network. In a VANET the destination often is not a node with a specific address, but a location or area: e.g. alert all vehicles approaching the place of an incident. The network is also connected to the Internet and therefore IP addressing is important as well. To fulfill these requirements a new method of Ipv6 addressing has been proposed allowing to address specific nodes and geographical areas. |
