Programmable radio boards (WARP)

Pulse-coupled oscillator synchronization on FPGA-based radios

The mathematical modeling of pulse-coupled biological oscillators offers a fully decentralized and scalable approach for time synchronization. There is a broad spectrum of work on pulse-coupled oscillators in physics, biology, neuroscience, and other disciplines. The communications engineering community has been interested to transfer these results to the synchronization of nodes in wireless networks. A one-to-one…

days

Research days on multi-UAV systems

Autonomously flying robots — also called small-scale unmanned aerial vehicles (UAVs) — are more and more exploited in civil and commercial applications for monitoring, surveillance, and disaster response. For some applications, it is beneficial if a team of coordinated UAVs rather than a single UAV is employed. Multiple UAVs can cover a given area faster…

Evsen Yanmaz with WARP boards

A relay selection protocol for cooperative wireless networks

The key idea behind cooperation in wireless networks is that devices help each other to communicate messages properly over the air. When a transmitter sends messages to a receiver, adjacent devices can overhear these messages. If the direct transmission to the receiver fails, one of those devices can retransmit (“relay”) its message copy to the…

TEWA03a

Wirtschaftsblatt: Smart network for factory halls

Metal parts in factory halls disturb wireless communications. ICT researchers from Klagenfurt invented a new transmission technique and are now looking for partners for implementation. Although the need for fast and reliable data transmission via WLAN increases in production halls, the technology is still limited. Mobile machinery, forklifts, and robots disturb the radio link between…

20130628-232832.jpg

UNIsono interviews Bettstetter

As part of a new series on research excellence, Romy Müller from the university magazine UNIsono recently interviewed Christian Bettstetter. “You have to enjoy research, be diligent and lucky to achieve success in science,” Bettstetter says. Good MSc graduates are recommended to target a PhD to later on have the choice to either stay in…

Marchenko and Bettstetter

Modeling protocols in relay networks with Markov chains

Wireless communications often suffers from error bursts — a long sequence of bits is corrupted when being transmitted over the air. A relatively new technique that tries to mitigate this unreliability is cooperative relaying. Its basic idea is simple: When a device transmits data packets to a destination, adjacent devices can overhear these packets. If…

Flying competition

Successful completion of cDrones

The Lakeside Labs project cDrones started in 2008 as an effort of four Klagenfurt professors to work on system-level aspects of small-scale unmanned aerial vehicles for application in disaster management. Using off-the-shelf, low-altitude multicopters equipped with high-quality cameras and GPS, the project team developed a software that enables an autonomous system for aerial reconnaissance. The…

Project Team SOSIE

Project kickoff: Decision making in networks with errors

The Lakeside Labs project SOSIE takes an interdisciplinary perspective on decision making in networks suffering from information errors. Human organizations and technical communication systems are compared to identify similarities and differences during decision making processes. Successful techniques may then be transferred from one discipline to the other. Friederike Wall, who initiated the project together with…

Bettstetter talks at TUM

Colloquium in honor of Eberspächer

A scientific colloquium in honor of Jörg Eberspächer was held at Technische Universität München on December 7, 2012. Eberspächer founded the Institute of Communication Networks in 1990 and retired as professor emeritus some weeks ago. The responsibilities were handed over to his successor, Wolfgang Kellerer, a PhD graduate of Eberspächer and then senior manager at…