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Femtocells are small, low-power, low-cost randomly deployed base stations, which are deployed by end users without proper cell planning or resource optimization. This ad-hoc deployment results in many technical issues that demand an effective solution to exploit the co-channel deployment with macro-cells. One typical problem is cross-tier interference especially at the cell edge where macro user equipments...
As the applications of mobile and ubiquitous technologies have become more extensive, the communication security issues of those applications are emerging as the most important concern. Therefore, studies are active in relation with various techniques and system applications for individual security elements. In this paper, we proposed a new technique which uses the voice features in order to generate...
Recently several P2P-based mobile media distribution systems including MOVi (Mobile Opportunistic Video on demand) are proposed as a complimentary solution for mobile VoD services. In this paper, we propose a three-step segment-based scheduling algorithm incorporating the notion of ORC (Opportunistic Regional Clusters) for mobile media distribution. By intelligently designing a centralized scheduling...
In this paper, context-aware based home services are described and developed for ubiquitous home, which consists of many sensors, digital appliances and a home server. The context-aware services provide residents with the intelligent services according to their situation, location, time and so on. For these services, information is collected by the sensors and is analyzed for the context by context-aware...
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