Prefetching Architecture for Hot-Spotted Network

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High-speed wireless access networks are studied for future wireless multimedia applications. In such an environment, a mobile host moving with high-speed like a car cannot have enough time for communication as the cell size will be very small and be configured discontinuously. In this paper, we propose a prefetch architecture referred as to Proactive Data Transfer for these networks. In this architecture, cellular network are also utilized for sending data prefetch request, and the data is prefetched at Prefetch Agent located in high-speed wireless networks. Proactive Data Transfer enables a user to start high-speed data communication as soon as she enters into the area. Moreover, throughput deterioration caused by congestion of backbone network can be alleviated. We also show the effect of proactive data transfer by experimentation.

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    ABSTRACT: Mobile devices are becoming smaller and smaller, ubiquitous, and connectable to various networks. Access to data while on the move provides for constant updates anytime and anywhere. Nowadays the relevance of information depends to a large extent on a user's position. In consequence location-awareness becomes more and more important for delivering relevant data. The way users request information can be described as 'burst-like', whereby the availability of seamless access to information and communication is a major concern for mobile users. The latter is a challenging task when dealing with unstable and low-bandwidth wireless networks, especially in areas that are not or only poorly covered. Prefetching is an elegant technique to handle information provisioning for users under these circumstances. In this paper, new strategies for prefetching in a location-aware surrounding are investigated.
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    ABSTRACT: This paper presents a predictive framework for mobility-aware prefetching to enhance the experience of a mobile Web user roaming between heterogeneous wireless access networks. We consider a heterogeneous two-tier wireless access network system, composed of smaller, but faster and cheaper wireless local area networks (WLAN) placed within a much larger, but slower and more expensive cellular wireless data network. An optimal prefetch threshold algorithm is proposed, which takes into consideration the user mobility pattern, the relative characteristics of the networks, and the user perceived value of time. Using current industry network parameters, we study the performance of the proposed prefetching algorithm. Our numerical results show how user mobility and the heterogeneous network configuration significantly alter the prefetching threshold. The performance of this algorithm is compared with that of a static prefetching algorithm, demonstrating that mobility-aware prefetching can significantly improve the performance of future-generation heterogeneous wireless networks.
    Preview · Conference Paper · Oct 2004
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    ABSTRACT: This paper proposes a fuzzy-based Prefetching method which obtains information to be referred in the near future with using the properties of mobile movement. We consider a velocity-based fuzzy model to find a pattern of movement for location-awareness service which provides the effective information about location change of mobile user or mobile computing on the context of Mobile Information Services. This procedure provides basic solutions which are optimal for a present situation with restricting the number of considered subject by defining prefetching area based on the movement length and direction.
    No preview · Conference Paper · Jan 2005
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