2.4 - Characterisation of Channel Usage in ISM/SRD Bands
- etc2014 - 34. European Telemetry and Test Conference
2014-06-03 - 2014-06-05
- 2. Data Links
- H. Lieske, F. Beer, J. Robert, A. Heuberger - Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Information Technology (Communication Electronics), Erlangen (Germany), G. Kilian - Fraunhofer Institute for Integrated Circuits IIS, Erlangen (Germany)
- 32 - 38
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.