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Vehicular Ad hoc NETworks (VANETs) are an extreme case of Mobile Ad hoc NETworks (MANETs). High speed and frequent network topology changes are the main characteristics of vehicular networks. These characteristics lead to special issues and challenges in the network design, such as in Medium Access Control (MAC). Due to the high speed and frequent network partitions, it is difficult to design a MAC scheme in VANETs that satisfies Quality-of-Service (QoS) requirements in all network scenarios. In this paper, the authors provide an evaluation of the mobility impact on the IEEE 802.11p MAC performance. In this evaluation, they identify a new unfairness problem in the Vehicle-To-Vehicle (V2V) communications.
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