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With the development of web service applications, how to improve the efficiency of service discovery is an important research work in modern times. From the aspect of service function, this paper clusters web services to form service clusters based on service ontology which is generated by domain modeling. It can significantly reduce the overhead and enhance the service discovery efficiency. The corresponding...
Next generation wireless communication systems are expected to relay on integrated networks consisting of multiple wireless technologies. Heterogeneous wireless networks based, for instance, on systems such as WiMAX and TD-SCDMA can combine their respective advantages, offering a high Quality of Service (QoS) to mobile users. The vertical handoff decision is crucial to the integration of heterogeneous...
Cognitive radio network has received increasing attention in recent few years. Cognitive radio network is viewed as a novel network for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. This paper first gives a general overview of the background and concept of cognitive radio network. Then we focus on the routing algorithm based on the QoS requirement. In...
Cognitive radio is a new technology which can sense the availability of local spare spectrum and be used to communicate with each other. In a multi-hop network consisted of cognitive radio nodes, the spectrum sharing for each cognitive radio node is very important. In real condition, as the number of users in different fixed regions is diverse, the dynamic spectrum sharing strategy should be dissimilar...
The storage architecture, data layout and access control strategies of the large-scale video storage server have great effects on its performance. In this paper, it analyses the performance requirement, architecture, data layout, access controlling and etc. of the large-scale video storage server and proposes a multi-segment video storage strategy of MPEG coding, which is based on the parallel disk...
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