Sensorlab / Publications


Tomaž Šolc
Performing cognitive radio experiments on the LOG-a-TEC sensor network testbed
CREW Training days, Brussels, Belgium.

LOG-a-TEC is an experimental outdoor sensor network testbed for spectrum sensing and cognitive radio applications. It consists of 50 remotely-controlled VESNA sensor nodes mounted on light poles in two clusters (city center and industrial zone) in the municipality of Logatec. Nodes are equipped with 72 MHz ARM Cortex-M3 processors, local non-volatile storage and versatile reprogrammable radio transceivers for 868 MHz, 2.4 GHz and UHF TV bands. Thus the testbed allows experimentation with distributed spectrum sensing, spectrum sharing and dynamic spectrum access, cognitive radio and networking protocols in realistic environments in both licensed and unlicensed frequency bands.

This tutorial aims to demonstrate the use of LOG-a-TEC testbed through the interfaces available to the experimenter. After describing the capabilities of the hardware provided by the testbed, we will start with the manual approach to communicating with sensor nodes through the CREW portal and the web interface. Next, open-source Python modules for testbed control will be introduced, allowing experiments to be written in a high-level programming language. As part of the tutorial a script performing a simple experiment will be written, explained and ran on a local computer, controlling the testbed remotely over the Internet. We will conclude with a brief description of the possibility of running native applications on sensor nodes themselves, making possible experiments that have tighter latency and throughput requirements.

Topic: hardware
Type: tutorial


As part of activities in the FP7 CREW project the Department of Communication Systems at JSI installed two VESNA SNE-ESTHER devices in London. SNE-ESHTER is a radio receiver for the UHF band designed at JSI based on the VESNA sensor platform. Installed devices will be used for advanced spectrum sensing, contributing to the large scale Ofcom TV White Spaces pilot. One device was installed on the roof of a building in the King's College London Strand campus and the other on the roof of Queen Mary University London. Long term measurements will be used to support the experimentation with advanced, so called cognitive radio devices, as secondary users in currently unused parts of the spectrum.

Marko Pesko, Miha Smolnikar, Matevz Vucnik, Tomaz Javornik, Milica Pejanovic-Djurisic and Mihael Mohorcic published a paper titled "Smartphone with augmented gateway functionality as opportunistic WSN gateway device" in Wireless Personal Communications journal. They described how a Samsung phone connected via Bluetooth to a VESNA sensor node can act as a gateway to a wireless sensor network.

Chapter "Low-cost testbed development and its applications in cognitive radio prototyping" written by our colleagues Tomaž Šolc, Carolina Fortuna and Mihael Mohorcic has been published by Springer in the book  "Cognitive Radio and Networking for Heterogeneous Wireless Networks" from the Recent Advances and Visions for the Future series.

Jernej and Klemen talked with Nickola Naous about our new VESNA sensor node design. Read about The engineers behind the WSN Vesna on the IoTMonkey blog.

The CREW project entered a continuous open access phase. You can test your cognitive radio networking solution on 5 differrent testbed islands and advanced radio components, including our LOG-a-TEC testbed and the VESNA sensor network platform.

In cooperation with Adria Mobil we are developing a motorhome for the future. Adria Moving Lab is equipped with intelligent sensors that allow the vehicle to adapt to its user. This way we can optimize the use of consumables like fuel and water and exploit renewable sources of energy like solar power. The prototype has been unveiled at the Institute Jožef Stefan open days in April 2014.

Our paper "Trends in the development of communication networks: Cognitive networks" is the 10th among the 25th most cited articles published since 2009, extracted from Scopus, see all on the Elsevier web site.

Check the "Cognitive radio experimentation with VESNA platform" presentation by Miha Smolnikar at the School on Applications of Open Spectrum and White Spaces Technologies.

We are looking for a C programmers that would join the team developing the VESNA platform. Candidates that have previous experience with electronic circuit design, operating systems or open source projects will have priority.


We are constantly open for talented, open minded and hard working undergraduate students, interns and MSc/PhD candidates. Read more.

[ more highlights ]


Dynamic composition of communication services

Carolina Fortuna

Orchestrating Virtual Wireless Networks from Shared Resource Pools
Luiz DaSilva

VESNA in Kognitivni Radio

Tomaž Šolc

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SensorNetwork testbed
Mash-up demo.


GSN demo

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