Adrian Carlos Loch Navarro
Technische Universität Darmstadt
Secure Mobile Networking Lab, Raum S4 14
Mornewegstraße 32, 64293 Darmstadt, Germany
+49 (0)6151 16 70922
+49 (0)6151 16 70921
In the context of “Smart Cities”, a very large number of systems and sensors need to communicate in an efficient manner. Ad hoc networks are very promising for this purpose, since they enable direct communication among these systems. If two devices are not in direct range of each other, they can communicate via intermediate nodes, turning each device into a router as well as an end system. Despite the fact that ad hoc networks have been extensively discussed in the past, scalable operation with high performance is still an open challenge. For the smart city scenario of the LOEWE Research Priority Program Cocoon, improving this issue is essential.
Current approaches to ad-hoc networking often abstract from the physical (PHY) and medium access control (MAC) layers, ignoring the characteristics of the wireless medium. By means of this abstraction, the wireless channel is modeled as the edges of a network graph, which enables algorithms to deal with the network like in a wired scenario. However, this approach often provides only poor performance and scalability. Instead of ignoring the wireless nature, we suggest harnessing the unique characteristics of PHY and MAC in this kind of networks. This allows cross-layer optimizations that could enhance notably the throughput, robustness and reliability of wireless multihop networks.
Existing work in this area investigates the benefits of network coding, opportunistic routing and partial packet recovery. Nevertheless, current research focuses rather on enhancing the performance of single hop links, than dealing with complete ad-hoc networks. Our approach is focused on exploring this kind of techniques in a multihop scenario in order to achieve better performance and scalability.