Istituto di Informatica e Telematica     
Renda M. E., Resta G., Santi P., Martelli F., Franchini A. IEEE 802.11p VANets: Experimental Evaluation of Packet Inter-Reception Time. In: Computer Communications, vol. 75 (-) pp. 26 - 38. Elsevier, 2016.
We start by showing that PIR cannot be reliably estimated from PDR, since the two metrics are only weakly correlated. Motivated by this finding, we present a thorough characterization of the PIR time distribution, which is shown to be a power law in a variety of configurations. The shape of the PIR time distribution indicates that potentially dangerous "situational awareness" blackouts are relatively frequent and positively time correlated.We then evaluate the effect of vehicle configuration and line-of-sight conditions on the PIR time, and show that relatively simple multi-hop beaconing techniques can substantially improve PIR statistics and, hence, safety. A final contribution of this paper is promoting the Gilbert-Elliot model, previously proposed to model bit-error bursts in packet switched networks, as a very accurate model of beacon reception behavior observed in real-world scenarios.
URL: http://dx.doi.org/10.1016/j.comcom.2015.06.003
DOI: 10.1016/j.comcom.2015.06.003
Subject Wireless Networks
Vehicular Networks
vehicular communications
IEEE 802.11p
C.2.2 Network Protocols - Routing protocols
C.2.1 Network Architecture and Design - Wireless communication

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