Understanding congestion in IEEE 802.11b wireless networks
IMC '05 Proceedings of the 5th ACM SIGCOMM conference on Internet Measurement
Advanced carrier sensing to resolve local channel congestion
VANET '11 Proceedings of the Eighth ACM international workshop on Vehicular inter-networking
Real-world evaluation of IEEE 802.11p for vehicular networks
VANET '11 Proceedings of the Eighth ACM international workshop on Vehicular inter-networking
Review: Information management in vehicular ad hoc networks: A review
Journal of Network and Computer Applications
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High channel load in vehicle-to-vehicle communication leads to a degradation of the vehicles' communication range, due to interference and hence packet loss at larger distances. Packet loss results from two or more concurrent transmissions, colliding at receivers located inbetween, which is also known as the hidden station problem. In previous works, our simulation study has shown that this packet loss leads to a degradation of 90% of the communication range. In this paper, we confirm the simulation results by real-world measurements. We present a methodology for transferring the simulation scenario to a real-world measurement scenario, able to evaluate the problem of hidden stations. With three radios applying the IEEE 802.11p standard, we measure the degradation of the communication range under interference. In the measurement, we find a degradation of 50 to 70%. On the one hand, there are less collisions due to only one hidden station. On the other hand, we identify that the receiving vehicle as a shadowing object itself is an additional origin for hiding the other station which slightly increases the number of collisions even at close distances.