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Interference of simulated IEEE 802.11 links with directional antennas

: Rademacher, M.; Jonas, K.


Ricardo, M. ; Institute of Electrical and Electronics Engineers -IEEE-; International Federation for Information Processing -IFIP-; IEEE Communications Society:
Wireless Days 2017 : 29-31 March 2017, Porto, Portugal; WD 17
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-5856-3
ISBN: 978-1-5090-5857-0
Wireless Days Conference (WD) <9, 2017, Porto>
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Virtualisierung von Netzfunktionen in Funknetzen auf der Basis von Software Defined Networks
Conference Paper
Fraunhofer FKIE ()

WiFi-based Long Distance (WiLD) networks have emerged as a promising alternative approach for Internet in rural areas. The main hardware components of these networks are commercial off-the-shelf WiFi radios and directional antennas. During our experiences with real-world WiLD networks, we encountered that interference among long-distance links is a major issue even with high gain directional antennas. In this work, we are providing an in-depth analysis of these interference effects by conducting simulations in ns-3. To closely match the real-world interference effects, we implemented a module to load radiation pattern of commonly used antennas. We analyze two different interference scenarios typically present as a part of larger networks. The results show that side-lobes of directional antennas significantly influence the throughput of long-distance WiFi links depending on the orientation. This work emphasizes that the usage of simple directional antenna models needs to be considered carefully.