In VANETs we Trust? Characterizing RF Jamming in Vehicular Networks
; Gross, J.
In VANETs we Trust? Characterizing RF Jamming in Vehicular Networks, Proc ACM International Workshop on VehiculAr Inter-NETworking - VANET, Windermere, United Kingdom, Vol. 1, pp. 1 - 10, June, 2012.
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In this paper we study the impact of RF jamming on 802.11p car- to-car communications. We build a jammer on a software defined radio and implement constant, reactive and pilot jamming patterns, whose effectiveness is first measured in an anechoic chamber. We perform extensive experiments in two relevant outdoor scenarios, namely a straight road in an open space as well as a dense build- ing scenario with a crossroad and characterize the performance of 802.11p communications under the impact of constant and reac- tive RF jamming. The constant jammer is able to dramatically disrupt communication regardless of the scenario. The reactive jammer exhibits a low impact in scenarios with reduced line-of- sight as its jamming success greatly depends on the relative po- sition of the nodes. It is, however, very effective in open-space scenarios. In general, we observe that RF jamming can cause large communication-blind areas. Under these conditions, critical safety applications would simply fail in their purpose of timely warning dissemination.