225,027 research outputs found

    EFFICIENT CELLULAR RADIO ACCESS MANAGEMENT FOR MOBILE COMPUTING DEVICES

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    Next generation cellular radios are being developed that facilitate higher (compared to legacy cellular radios) bandwidth, lower latency, etc. While mobile computing devices may include the next generation cellular radios, deployment of next generation cellular base stations that provide full next generation support is sparse. As such next generation cellular radios have only recently been introduced, the next generation cellular radios have not been subjected to extensive power optimization, resulting in significant power consumption (particularly when not connected to the sparsely deployed next generation cellular base stations). Techniques described in this disclosure enable efficient cellular radio access management for mobile computing devices in which the mobile computing devices actively enable and disable the next generation cellular radio based on a proximity to the next generation cellular base stations (or, in other words, geofencing)

    Next Generation Middleware Technology for Mobile Computing

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    Current advances in portable devices, wireless technologies, and distributed systems have created a mobile computing environment that is characterized by a large scale of dynamism. Diversities in network connectivity, platform capability, and resource availability can significantly affect the application performance. Traditional middleware systems are not prepared to offer proper support for addressing the dynamic aspects of mobile systems. Modern distributed applications need a middleware that is capable of adapting to environment changes and that supports the required level of quality of service. This paper represents the experience of several research projects related to next generation middleware systems. We first indicate the major challenges in mobile computing systems and try to identify the main requirements for mobile middleware systems. The different categories of mobile middleware technologies are reviewed and their strength and weakness are analyzed

    C-Arc: A Novel Architecture for Next Generation Context- Aware Systems

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    Computing is becoming increasingly mobile and ubiquitous. This implies that applications and services must be aware and adapt to highly dynamic environments. However, building contextaware mobile services is currently a complex and time consuming task. The emergence of truly ubiquitous computing, enabled by the availability of mobile and heterogeneous devices and an increasing number of commercial off-the-shelf sensing technologies, is hampered by the lack of standard architectural support for the development of context-aware systems. In this paper, the common architecture principles of context-aware systems are presented and the crucial contextaware architecture issues to support the next generation context-aware systems which will enable seamless service provisioning in heterogeneous, dynamically varying computing and communication environments are identified and discussed. Furthermore, a novel architecture, CArc,is proposed to aid in the development of the next generation context-aware systems. A prototype implemented of C-Arc is also presented to demonstrate the architecture. C-Arc provides support for most of the tasks involved in dealing with context, namely acquiring context from various sources, interpreting context and disseminating context.Keywords: Context-aware architecture, context-aware systems, context-aware mobile services,mobile and ubiquitous computing
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