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Prof. Dr. Holger Karl

Network-Informed Control - Control-Informed Networking (NICCI)

The DFG-funded project NICCI intends to harmonize the resource management of wireless communication with the sensing and control demands of control applications running over such wireless links. A typical example would be several robots with local sensors, measuring some values that need to be communicated to a remote controller, and that controller computes control commands for those robots. The challenge is to deal with changes in the wireless channels on the one hand and more or less urgent demands by the robots on the other hand. Currently, we favor a machine-learning approach to deal with this multi-level resource management problem. 

Job offers: [ PDF (de) ] [ PDF (en) ]

Investigators: OPEN POSITION!
Project duration: January 2017 - December 2022
Funded by: Deutsche Forschungsgemeinschaft (DFG) 

Acoustic Sensor Networks

The idea of this project is to use distributed microphones, connected together by wireless communication, for sophisticated acoustic applications. Examples include detecting the location of a speaker, echo cancellation, denoising a recording, or selecting the best microphone for alternating speakers. These acoustic applications can be useful in use cases like class rooms, conference or lecture halls, or meeting rooms. 

A challenge here is that these applications require high-resolution audio streams, resulting in high data rate, possibly over longer distances (e.g., in conference halls). In addition, latency should be low. To support these requirements, it is promising to distribute signal-processing functions directly onto the microphones (or possibly, intermediate nodes). This can reduce data rates and improve latency and overall quality of experience. 

This idea is investigated as project P1 of the DFG Research Group (DFG Forschergruppe) FOR 2457 Acoustic Sensor Networks


Investigators: Haitham Afifi
Project duration: February 2017 - January 2023 (extended after three years) 
Funded by: Deutsche Forschungsgemeinschaft (DFG) 
Publications: Separate page

CRC 901: On the fly computing

This is a research project funded by the DFG collaborative research center SFB 901 "On-The-Fly-Computing". The research center investigates individually and automatically configured IT services which are composed from and executed on a marked of world wide traded combinalbe services and execution platforms. Within this research center our research group investigates the the communication network as one important ingredient for such market platform. Our research covers the realization and optimization of overlays over real networks as well as the optimized allocation of resources in single- and multi-site data centers. More details can be found on adedicated web page

Investigators: Asif Hasnain, Adrian Redder (and in the past: Arne Schwabe, Philip Wette)
Project duration: July 2011 - June 2023 (with extensions after four and eight years)
Funded by: Deutsche Forschungsgemeinschaft (DFG) 
Publications: Separate page