| Carl Friedrich Gauß Faculty | Department of Computer Science

Robust, Energy Efficient Wireless Sensor Networks for Outdoor Scenarios by Adaption of Operation Parameters

The opportunities for Wireless Sensor Networks are as well various and challenging. In agriculture, e.g., distributed sensors can be used to measure plant growth or for soil analysis. Here, robustness of single nodes and the whole network is of major importance for successful projects or smart farming approaches. Almost every environmental impact has also direct or indirect influence on the lifetime of the nodes or the network, whereby also huge deviations in environmental conditions occur. Provoked by sun exposure, a single sensor node can show a difference in temperature of 56°C in just one day. Additionally, there is an intense heterogeneity in temperature between the particular nodes within the network.

To enable a long-term operation of sensor networks under such conditions they should be very robust against such influences and energy supply has to be ensured. Besides other things, robustness can be achieved by reducing the energy requirements of the node, respectively by adapting the requirements to the generation or vice versa. Additionally, some tasks (e.g., record, store, or process data) can be postponed or relocated in order to adapt them in the temporal or the spatial dimension, on a single node and/or within the network, and to adjust them to the specific environmental or energy conditions. So, especially in outdoor scenarios we have the situation that a.) Some nodes may work more energy efficient than others - due to their temperature and their individual characteristics (heterogeneity within the network) and b.) Changing environmental conditions (over time - e.g. direct sunlight / shadow or day / night) lead to dynamic shift of the energy efficiency of single nodes or the whole network. Opportunities for Energy Harvesting share this dynamics, as well.

Monitoring the changing environmental conditions allows to benefit from the systems dynamics. Realistic models for energy and reliability will be derived from these measurements. Combined with the knowledge about the characteristics of the nodes in the network, this information can, e.g., be used for routing decisions, task scheduling, and processing within the network. By predicting the environmental variables, a suitable time for performing intensive computations or forwarding data in delay tolerant networks can be determined. Specific scheduling and routing protocols will be developed to achieve a robust wireless sensor network under dynamic conditions. The investigated relations and the implemented algorithms will be evaluated continuously in a real environment.


  • Longterm measurement of the soil temperature

    This experiment was used to measure the soil temperature in different depths. Using this

  • REAPer

    The reaper is a test platform for energy harvesting. Its purpose is to provide a generic interface for energy sources and energy storages. Commonly used are super capacitors as storage and solar panels or peltier elements for harvesting.

    Additionally, the platform integrates a programmable voltage supply, a secure co-processor and a generic header for the base board holding the actual MCU.

    The platform allows to test different MCUs in an energy harvesting sensor node.

  • Low-Cost Temperature Chamber



Project members at IBR

Robert Hartunghartung[[at]]ibr.cs.tu-bs.de+49-531-3913246131
Dr. Ulf Kulaukulau[[at]]ibr.cs.tu-bs.de
Prof. Dr. Felix Büschingbuesching[[at]]ibr.cs.tu-bs.de+49-531-3913289111
Prof. Dr.-Ing. Lars Wolfwolf[[at]]ibr.cs.tu-bs.de+49-531-3913288138


MikroprozessorlaborHiWi JobRobert Hartung, Yannic Schröder, Sven Pullwitt, Jan Schlichteropen
Risk-oriented Task Scheduling for Wireless Sensor NodesBachelor Thesis, Master Thesis, Project ThesisDr. Ulf Kulauopen
Entwicklung eines kontextabhängigen Ratings für Sensorknoten in drahtlosen SensornetzwerkenMaster ThesisRobert Hartung
Porting IdealVolting to the RIOT Operating System with respect to utilizing low power managementProject ThesisRobert Hartung, Dr. Ulf Kulaufinished
Development of a battery test card to measure temperature effects on batteriesMaster ThesisRobert Hartungfinished
Optimierung, Parallelisierung und Erweiterung des COOJA-SimulatorsTeam Project ThesisRobert Hartungfinished
Battery modelling with respect to temperatureBachelor ThesisRobert Hartungfinished
Online Modellbildung auf drahtlosen Sensorknoten unter Energie- und Speicherplatzgesichtspunkten, Online modeling on wireless sensor nodes under energy and memory considerationsMaster ThesisRobert Hartungfinished
Entwicklung eines Micro-Source-Energy-Harvesters für SensorknotenMaster ThesisDr. Ulf Kulaufinished
Evaluation von transienten Knotenausfällen im FIT/IoT-LabBachelor Thesis, Project ThesisDr. Ulf Kulaufinished
Datenerhebung von IEEE 802.15.4 Radios unter verschiedenen TemperatureinflüssenBachelor ThesisDr. Ulf Kulau, Robert Hartungfinished
An adaptive prediction approach for low power WSNMaster ThesisDr. Ulf Kulaufinished
Abhärtung des RPL-Protokolls gegen transiente KnotenausfälleMaster ThesisDr. Ulf Kulaufinished
Energy Harvesting für Sensorknoten unter Nutzung der BodentemperaturBachelor ThesisDr. Ulf Kulaufinished
RPL Objective Function to optimize the lifetime of Wireless Sensor NetworksMaster ThesisRobert Hartungcancelled

If you are interested in writing a thesis regarding this project, please feel free to contact Robert Hartung.


DFG This research project is funded by the German Research Foundation (DFG) under grants no. BU 3282/2-1.

last changed 2020-06-19, 16:05 (dynamic content) by Robert Hartung