Optimized Position-based Routing and Broadcasting in Mobile Ad-hoc Networks

In the past few years mobile ad-hoc networks came increasingly into scope of interest. Mobile ad-hoc networks are mainly confronted with the problems of unknown topologies as well as mobility. Several approaches to support functionality and reliability under such conditions have been pronounced. One group of such schemes is based on the network participant’s location information. Furthermore, most of those protocols distribute their position information pro-actively within their neighborhood using ”hello-messages”. At routing time however, that data may lack of accuracy because of outdated neighborhood information. This may cause network unreliability as well as routing overhead. Several approaches to avoid such inaccuracies are discussed and evaluated within the first part of this diploma work. Recently location-based routing schemes which abandons neighborhood knowledge have been proposed. Those schemes deliver the position information on-demand within data messages. A dynamic delayed broadcasting protocol, constitutive on such a scheme is introduced and evaluated in the second part of this thesis.