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Characterisation of channel usage in ISM/SRD bands

: Lieske, Hendrik; Beer, Frederik; Kilian, Gerd; Robert, Jörg; Heuberger, Albert


AMA Service GmbH, Wunstorf:
etc 2014, 34. European Telemetry and Test Conference : June 2 - 5 2014, Nuremberg, Germany
Wunstorf: AMA Service, 2014
ISBN: 978-3-9813484-7-7
European Telemetry and Test Conference (etc) <34, 2014, Nürnberg>
Conference Paper
Fraunhofer IIS ()

Spectrum occupancy measurements for sub-GHz unlicensed frequency bands at two distinct inner city locations are presented in this paper. Short time measurements of spectrum utilization in three different bands are followed by a long-term observation of a selected sub-band over 7 days. The antenna in the latter measurement has an exposed position, which is typical for a fixed base station of a data aggregation network. For a selected frequency range, important signal characteristics (e.g. signal durations and inter-arrival times) are obtained and utilized to parameterise a proposed interference model. This analytic model accurately describes the collision probability of a packet transmission in the considered channel.