Mobile ad hoc networks have attracted remarkable attention in the research community in recent years. Fashioned from whatever devices are immediately available, the self-organizing nature of ad hoc networks promises spontaneous communication in the absence of infrastructure. However, the fact that ad hoc networks are not yet deployed at large indicates that they are not ready for prime time.
Ad hoc networks are built upon the premise of node cooperation. We challenge this cooperation and analyze the effects of node misbehavior. In particular, we investigate the effects on performance and dependability of the routing system. As a solution to the problem, we propose two scenario-specific approaches. We introduce (1) the so-called "Provider-mediated Communication" paradigm, which operates as a hybrid of an ad hoc network and a cellular network. We (2) discuss a cross-layer approach towards geographically secure routing. Both approaches have been shown to mitigate the effects of node misbehavior, thus acting as a vaccine to prevent network frailty.
Dr. Matthias Hollick is the head of the Mobile Networking group (MobNet) and the Ubiquitous Communications group (UbiqCom) at the Multimedia Communications Lab (KOM) of Technische Universität Darmstadt, Germany. His research interests are in the area of dependability, security, and quality of service provisioning in communication networks. In particular, the focus of his current work is on self-organizing mechanisms to enable dependable and quality-of-service-aware communication in mobile/wireless ad hoc, mesh, and sensor networks. His research has been supported by research grants from Siemens AG, Corporate Technology, DoCoMo Eurolabs, and various public research bodies.
Dr. Hollick received his Diploma degree (Dipl.-Ing., M.Sc. equivalent) in electrical engineering in 1998. In 2004 he received his Doctoral degree (Dr.-Ing.) with distinction (summa cum laude) from the Technische Universität Darmstadt. Dr. Hollick is member of the ACM and IEEE and serves on various program committees and editorial boards related to his research area. He is teaching various courses in the domain of wireless/mobile communications at TU Darmstadt and at partner universities. Amongst other activities he acts as an expert for the European Union and reviewer for the German National Science Foundation (DFG). For his research, in 2005 Dr. Hollick received the award of the Adolf-Messer Foundation (Adolf-Messer Stiftung), which is endowed with 50,000 EUR.