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Since web services intended for the same application environment tend to be functionally homogeneous, researchers have turned to their non-functional aspects in order to constructively compare web services and choose an appropriate one. In general, quality of service is very important to users. Many schemes that consider quality assessment have been proposed for web service selection. With the increasing...
Location-based Services (LBSs) via mobile handled devices have been subject to major privacy concerns for users. Currently, most of the existing works concerning the continuous LBS queries mainly focus on users' privacy demands with little consideration of the service of quality (QoS). In this paper, we propose a Demand-Aware Location Protection scheme (DALP) for continuous LBS requests, allowing...
Time constrained service composition raises several problems. Researches on QoS-driven service composition provide some preliminary solutions, but there are still some unsolved issues, which can be attributed to the following reasons: (1) the huge time consumption of inter-domain validation, (2) the dynamic execution time of services and (3) the difficulty in defining time constraint due to the opaque...
The vertical handoff is highly time-sensitive in the heterogeneous wireless environment. The most available handoff decision methods are based on a few network parameters, and so the prediction of network parameters can intensely improve the efficiency of the vertical handoff. This paper focuses on improving the prediction model based on cost function. We first propose an adaptive network parameter...
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