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This research was aimed at using Vehicular Adhoc NETworks (VANET) as infra-structure for an urban cyber-physical system in order to gather valuable data in a city. This paper is proposed an Urban Data Collector (UDC) protocol in urban area where all nodes are data sources and there is a gateway as ultimate destination for all packets. UDC tries to reduce the number of forwarders using three suppression techniques taking into account the amount of collected data from each road segment to support sensing applications. In this paper, the performance of the UDC protocol was evaluated with different replica suppression mechanisms using large scale simulation of up to 1250 nodes on NS-3 in a Manhattan grid topology.
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