CREW offers Open Access

CREW is in continuous Open Access phase to support your experiments free of charge!

Final public event & Globecom tutorial

CREW will present its final results at the Wireless Community event (Leuven, Belgium, 29 October 2015, more info) and organises a hands-on tutorial at Globecom (San Diego, USA, 10 December 2015, more info)

CREW PORTAL: access the CREW facilities

Interested in using the CREW facilities?
[Start here] - [Browse by name] - [Overview images] - [Advanced info] - [WTA GitHub].

TVWS workshop - LOG-a-TEC testbed applications in TVWS

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Abstract of presentation "LOG-a-TEC testbed applications in TVWS" during the workshop on TV White Spaces (Mon. 18 Feb. 2013) by Miha Mohorčič (JSI)

LOG-a-TEC testbed is part of Jožef Stefan Institute's contribution to the CREW federation. The testbed is based on the VESNA wireless sensor network platform and consists of 50 remotely-controlled VESNA devices deployed in an out-door environment on public lighting infrastructure in the town Logatec. VESNA devices form a wireless mesh network and are equipped with three different types of radio transceivers that allow experimentation with novel radio-frequency communication technologies. Two clusters, one in a city centre and one in an industrial zone, enable experimenters to evaluate their solutions in realistic environments. In addition to supporting experiments in the unlicensed 868 MHz and 2.4 GHz bands, a subset of devices in the testbed also supports operation in the TV part of the UHF band. This allows the testbed to be used in research into TV white spaces with a focus on spectrum sensing using low-cost, low-complexity devices. Integration of the testbed with the GRASS/RaPlaT radio planning tool further makes possible to plan experiments and compare results with predictions based on various propagation models.

Thus far, the LOG-a-TEC testbed has been used within the project to compare the DVB-T and wireless microphone detection capabilities of different spectrum sensing equipment used in the CREW federation as well as two radio propagation planning tools. In the second CREW open call an external experiment has been accepted in which the testbed will be used in creation of a dynamic white spaces geo-location database. By merging static information obtained from Slovenian broadcasters with near real-time channel occupancy data obtained from the LOG-a-TEC sensor network a database will be established that will provide white-space spectrum opportunities to mobile devices, taking into account exclusion areas for both registered and primary users detected through spectrum sensing.
This presentation will focus on functional capabilities of the testbed and on the example experiments conducted so far using the testbed.

 

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CREW_workshop_on_TV_white_spaces-JSI.pdf3.47 MB