Guiyang Luo, Shucong Jia, Zishan Liu, Konglin Zhu, Lin Zhang
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sdnMAC: A software defined networking based MAC protocol in VANETs
In this paper, we propose a hierarchical architecture based on software defined networking (SDN) to manage the physical resources in vehicular ad-hoc networks (VANETs), namely sdnMAC. First of all, a novel roadside unit (denoted by ROFS) is designed, which is an OpenFlow switch equipped with a wireless interface. Then, a hierarchical architecture is proposed for sdnMAC, consisting of two tiers, one is the management of the ROFSs by the Controller, the other is management of vehicles by ROFSs. Due to the cooperative share of slots information, sdnMAC can provide pre-warning of collisions and agility to topology change and varying densities of vehicles.
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