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Recent advances in virtualization technology have made it possible to partition a network into multiple virtual networks managed by different users. Although virtual networks share the same physical infrastructure, they host diverse applications with different goals. Unfortunately, current virtual network provisioning solutions have only focused on achieving a single objective that may not be suited...
Software Defined Networking promises to simplify network management tasks by separating the control plane (a central controller) from the data plane (switches). OpenFlow has emerged as the de facto standard for communication between the controller and switches. Apart from providing flow control and communication interfaces, OpenFlow provides a flow level statistics collection mechanism from the data...
Mobile data service is a rapidly growing business sector today. Available application bandwidth is an essential metric for managing applications and user experience. However, existing bandwidth measurement tools are ill-suited for the wireless environment due to large variance in environmental conditions, mobility, and energy consumption constraints. In this paper, we modify a known available bandwidth...
In managing multimedia services, it is important to understand how network performance affects user experience. The model presented in this paper aims to estimate user perception of video quality based on defect events, which are automatically classified by machine learning techniques. The underlying principle of our model is that human experience is event-based and there is a strong correlation between...
Multimedia services have become a dominant part of the network and content provider's service portfolio. A formal modeling methodology for video quality assessment not only affords the providers a clear cause-effect management view of their services, but also helps to guide management and planning operations. We examine the relation between network performance and perceived video quality through VIDAR,...
Recently, operators have resorted to femtocell networks in order to enhance indoor coverage and quality of service since macro-antennas fail to reach these objectives. Nevertheless, they are confronted to many challenges to make a success of femtocells deployment. In this paper, we address the issue of resources allocation in femtocell networks using OFDMA technology (e.g., WiMAX, LTE). Specifically,...
In this paper, we propose a novel recommender framework for P2P file sharing systems. The proposed recommender system is based on user-based collaborative filtering technique. We take advantage from the partial search process used in partially decentralized systems to explore the relationships between peers. The proposed recommender system does not require any additional effort from the users since...
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