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Auflistung nach Autor:in "Lampe, Patrick"

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  • Textdokument
    Energy-efficient Mobile Sensor Data Offloading via WiFi using LoRa-based Connectivity Estimations
    (INFORMATIK 2021, 2021) Zobel, Julian; Frommelt, Paul; Lieser, Patrick; Höchst, Jonas; Lampe, Patrick; Freisleben, Bernd; Steinmetz, Ralf
    Animal monitoring in natural habitats provides significant insights into the animals’ behavior, interactions, health, or external influences. However, the sizes of monitoring devices attachable to animals strongly depends on the animals’ sizes, and thus the range of possible sensors including batteries is severely limited. Gathered data can be offloaded from monitoring devices to data sinks in a wireless sensor network using available radio access technologies, but this process also needs to be as energy-efficient as possible. This paper presents an approach to combine the benefits of high-throughput WiFi and robust low-power LoRa communication for energy-efficient data offloading. WiFi is only used when connectivity between mobile devices and data sinks is available, which is determined by LoRa-based distance estimations without the need for additional GPS sensors. A prototypical implementation on low-end commodity-off-the-shelf hardware is used to evaluate the proposed approach in a German mixed forest using a simple path loss model for distance estimation. The system provides an offloading success rate of 87%, which is similar to that of a GPS-based approach, but with around 37% less power consumption.
  • Textdokument
    tRackIT OS: Open-source Software for Reliable VHF Wildlife Tracking
    (INFORMATIK 2021, 2021) Höchst, Jonas; Gottwald, Jannis; Lampe, Patrick; Zobel, Julian; Nauss, Thomas; Steinmetz, Ralf; Freisleben, Bernd
    We present tRackIT OS, open-source software for reliable VHF radio tracking of (small) animals in their wildlife habitat. tRackIT OS is an operating system distribution for tRackIT stations that receive signals emitted by VHF tags mounted on animals and are built from low-cost commodity-off-the-shelf hardware. tRackIT OS provides software components for VHF signal processing, system monitoring, configuration management, and user access. In particular, it records, stores, analyzes, and transmits detected VHF signals and their descriptive features, e.g., to calculate bearings of signals emitted by VHF radio tags mounted on animals or to perform animal activity classification. Furthermore, we provide results of an experimental evaluation carried out in the Marburg Open Forest, the research and teaching forest of the University of Marburg, Germany. All components of tRackIT OS are available under a GNU GPL 3.0 open source license at https://github.com/nature40/tRackIT-OS.