Abstract
Road-to-vehicle communication (RVC) system will support multiple services in future intelligent transportation systems (ITS). To meet different QoS requirements especially on delay, it is important to differentiate data frames of different applications. However the upcoming Northern American DSRC standard based on IEEE 802.11a specification uses legacy DCF MAC and it lacks support for different QoS which is crucial in future multi-service RVC system. In This work we analyze different QoS requirements of the various possible applications in ITS and propose to use enhanced DCF (EDCF) for future RVC systems to give QoS enhancement. Through simulation, we are sure EDCF is much more suitable for future typical ITS applications.
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