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The increasing demand of cloud services has rapidly raised the size of data centers, and consequently their power consumption. Data centers are usually over-sized, to be ready for further business increase; further, today many infrastructures are build as federation of multiple sites, to place the workload next to the user. Effective energy management policies are required in place to modulate power...
Pervasive communications are greatly affected by mobility issues. Users often move and that implies different devices and networks to become available dynamically. Terminal handovers and session migrations could negatively impact the enjoyment of multimedia content in such scenarios. In this paper, we introduce the concept of personal address and proposed a mobility framework around it, which accounts...
Today users are getting used to have many heterogeneous devices available in their surroundings. This opens great opportunities to build pervasive communication environments. Pervasive communications are usually user-centric in nature, as they should target sessions to users rather than their specific devices. Mobility is a key issue in such context: users often move and that implies different devices...
Real-time multimedia traffic requires some minimum delivery guarantees to be effectively transmitted over packet-switched networks. This is even more necessary when interactive sessions (e.g., voice-over-IP applications) are involved. Effective and timely packet delivery is sometimes achieved by overdimensioning network capacity. However, this is not the most practical and economic solution. Instead,...
Streaming of multimedia data is a common application in today's Internet. The trend towards ubiquitous computing raises expectations from the users about enjoying multimedia contents everywhere and with any device. However, current protocols for streaming data (e.g., RTSP) have not been designed for this purpose, thus they fail in providing the user with a transparent and seamless media experience...
Current trends in 3D visualization merged with internet applications and sensor technologies will soon break the barriers to the widespread acceptance of 3D Internet, and they will enable a full user immersion in the virtual world. However this evolution will impact dramatically on the existing infrastructures since the fruition of 3D content in real time by a huge number of people poses new issues...
Nowadays the majority of Internet traffic is generated by peer-to-peer (P2P) file sharing applications. As the popularity of these applications has been increasing dramatically over the past few years, it becomes increasingly important to analyze their behavior and to understand their effects on the network. The ability to quantify their impact on the network is fundamental to a number of network...
Over the last few years, peer-to-peer (P2P) file sharing applications have evolved to become a major traffic source in the Internet. The ability to quantify their impact on the network, as a consequence of both signaling and download traffic, is fundamental to a number of network operations, including traffic engineering, capacity planning, quality of service, forecasting for long-term provisioning,...
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