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Data dissemination, especially large amount of data transmission, has become one of the main tasks for the selfish vehicle nodes in Vehicular Ad hoc Networks (VANETs). Exploiting the Road Side Unites (RSUs), which construct the Cloud Computing environment, provides more data access opportunities and stable communication time for the vehicles. However, due to the high mobility of the vehicles and the...
The prevalence of social networking services dramatically changes the landscape of video distribution, in which social video contents spread much faster than traditional video-sharing portals. The pervasive wireless connectivity further enables users to view and generate videos from anywhere at any time. In this paper, we focus on the problem of collaborative distribution of social videos in a wireless...
The MapReduce processing framework is unaware of the property of underlying datasets. For ordered datasets (e.g., time-series data), in which records have been already sorted, MapReduce still performs unnecessary sorting operations during its execution. It directly results in a significant increase of execution time, as sorting a large volume of data is time-consuming. In this paper, we propose a...
In OFDMA-based Cognitive Radio (CR) systems, how to deal with the time-varying nature of avaliliable spectrum resources has become a hotspot and challenging problem in resource allocation. Traditional resource allocation algorithm can not guarantee proportional rates among non-real-time CR user (CRU) because the number of available subchannels is smaller than the number of CRUs in some OFDM symbol...
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