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Cloud services make use of data center resources so that hosted applications can utilize them as needed. To offer a large amount of computational resources, cloud service providers manage tens of geographically distributed data centers. Since each data center is made up of hundreds of thousands of physical machines, energy consumption is a major concern for cloud service providers. The electric cost...
Using proxy servers to cache and shape network traffic can significantly improve the energy efficiency of the participating mobile clients. In this paper, we analyze the implications of hosting a BitTorrent proxy on a broadband router, which pushes the content to a mobile phone over wireless radio (WLAN or 3G). The amount of memory in a router is limited and therefore our interest is on how to use...
This paper presents a distributed proxy solution that enables energy efficient BitTorrent downloads for mobile devices. Instead of using a single proxy, this work focuses on using multiple proxy servers to achieve better bandwidth utilization and thus smaller mobile energy consumption. We present an analytical model that can be used to experiment with different proxy setup and evaluate them from the...
Peer-to-peer distribution of information plays an increasingly important role in nowadays society. Currently, the major fraction of the Internet traffic stem from peer-to-peer systems. Hence, in order to cut down the emissions of carbon dioxide from ICT (information and communication technology) business, which contributes 2 percent of the global consumption, it is necessary to understand energy consumption...
In recent years, improving network model and enhancing the network performance have received people's attention gradually. The peer-to-peer network model has been used in Ad Hoc networks to increase the data output rate, to reduce the transmission power, to increase network capacity and the better load balance. However, the network analysis topology computation, the routing and the energy supply have...
Using proxy servers to cache and shape network traffic can significantly improve the energy efficiency of the participating mobile clients. In this paper, we analyze the implications of hosting a BitTorrent proxy on a broadband router, which pushes the content to a mobile phone over wireless radio (WLAN or 3G). The amount of memory in a router is limited and therefore our interest is on how to use...
We studied consumer attitudes towards different aspects of mobile peer-to-peer services by administering questionnaires to Finnish consumers using advanced handsets (N = 196). Most of the intention to use non-established services did not materialize as actual usage. Music and software downloading attracted most payment willingness. Legal file sharing stood out as a promising new business model. Respondents...
In this paper, we consider sensor database systems. Sensors are attached to objects and queries on the objects are operated at the sensor network level. Although queries to such a system might be extremely complex, ensuring efficiently basic functionalities such as broadcast or anycast without any central element is not trivial. In this paper, we provide a suite of *-cast (anycast, k-cast, broadcast)...
Mobile devices provided with cellular and short-range radio network interface cards offer the user potentials for new communication paradigms based on a cooperative behavior. The idea is that devices in close proximity exchange, through available short-range links, complementary shares of information downloaded from the cellular connections. Results in the literature have proven equal benefits for...
This paper presents a novel mechanism that enables mobile devices to efficiently participate in Distributed Hash Tables (DHTs). By selectively dropping messages, we can significantly reduce traffic and thus the energy consumption of mobile nodes with only minor performance degradation. The protocol extension preserves compatibility with existing widely used DHT systems. We evaluate the solution by...
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