Broadcast reception rates and effects of priority access in 802.11-based vehicular ad-hoc networks
Proceedings of the 1st ACM international workshop on Vehicular ad hoc networks
Vehicular networks in urban transportation systems
dg.o '05 Proceedings of the 2005 national conference on Digital government research
Mobeyes: smart mobs for urban monitoring with a vehicular sensor network
IEEE Wireless Communications
IEEE Communications Magazine
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
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An emerging field of application for IEEE 802.11 are Wireless Sensor Networks (WSNs) in which the network nodes do not have significant power and cost constraints, such as Vehicular WSNs employing the "under construction" standard IEEE 802.11p. In this paper we provide an analytical evaluation of the performance of IEEE 802.11 Distributed Coordination Function (DCF) in a query-based scenario. In such scenario each node transmits a single packet to a gathering center called sink only upon the sink request. Therefore previous analyses with the assumption of data traffic saturation [8] do not apply as in our case the number of nodes competing for the channel as well and the probability of packet collision are time dependent. Our mathematical model allows the evaluation of the probability that a node succeeds when accessing the channel as a function of time, packet length and number of network nodes. We also validate the results obtained with the model through simulation.