TY - CHAP U1 - Konferenzveröffentlichung A1 - Rademacher, Michael A1 - Jonas, Karl A1 - Kretschmer, Mathias T1 - Quantifying the spectrum occupancy in an outdoor 5 GHz WiFi network with directional antennas T2 - 2018 IEEE Wireless Communications and Networking Conference (WCNC), April 15-18, 2018, Barcelona, Spain N2 - WiFi-based Long Distance networks are seen as a promising alternative for bringing broadband connectivity to rural areas. A key factor for the profitability of these networks is using license free bands. This work quantifies the current spectrum occupancy in our testbed, which covers rural and urban areas alike. The data mining is conducted on the same WiFi card and in parallel with an operational network. The presented evaluations reveal tendencies for various aspects: occupancy compared to population density, occupancy fluctuations, (joint)-vacant channels, the mean channel vacant duration, different approaches to model/forecast occupancy, and correlations among related interfaces. KW - Spectrum occupancy KW - spectrum sensing KW - U-NII band KW - IEEE 802.11 KW - cognitive radio KW - LAA KW - LTE-U UN - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-37086 SN - 978-1-5386-1734-2 SB - 978-1-5386-1734-2 U6 - https://doi.org/10.1109/WCNC.2018.8377013 DO - https://doi.org/10.1109/WCNC.2018.8377013 SP - 1 EP - 6 PB - IEEE ER -