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Exploiting Concurrent Wake-Up Transmissions Using Beat Frequencies.

Timo Kumberg¹, Christian Schindelhauer², Leonhard Reindl³

¹Department of Microsystems Engineering - IMTEK, Laboratory for Electrical Instrumentation, University of Freiburg, Georges-Koehler-Allee 106, 79110 Freiburg, Germany. timo.kumberg@imtek.uni-freiburg.de.

Sensors (Basel, Switzerland)

|September 22, 2017

Summary

Ultra-low power wake-up receivers for wireless sensor networks can be improved. A novel scheme uses interfering signals to boost reception, enhancing reliability and achieving nearly 100% wake-up rates.

Keywords:

MAC protocol beat frequency concurrent transmissions constructive interference protocol wake-up flooding wake-up receiver wireless sensor network

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Area of Science:

Electrical Engineering
Computer Science
Wireless Communication

Background:

Wake-up receivers are crucial for low-power wireless sensor networks, enabling on-demand communication.
Their passive demodulation limits sensitivity, posing a challenge for reliable data reception.

Purpose of the Study:

To introduce a novel communication scheme to enhance the sensitivity and reliability of ultra-low power wake-up receivers.
To develop and validate a communication algorithm and flooding protocol based on this new scheme.

Main Methods:

Exploiting purposefully interfering, out-of-tune signals from multiple wireless sensor nodes.
Generating a wake-up signal via the beat frequency of superposed carrier signals.
Implementing and testing a novel communication algorithm and flooding protocol.

Main Results:

Achieved an increase in received signal strength by up to 3 dB.
Demonstrated improved communication robustness and reliability in both indoor and outdoor experimental setups.
The flooding algorithm achieved nearly 100% wake-up rate in under 20 milliseconds.

Conclusions:

The proposed communication scheme effectively enhances wake-up receiver performance in wireless sensor networks.
The developed algorithm and flooding protocol are feasible and significantly improve wake-up rates and reliability.
This approach offers a promising solution for robust, low-power wireless communication systems.