Pervasive computing has many new features, such as: the wideness related area, mobility of tasks and het-erogeneity of devices. How to support user's tasks in the pervasive computing environment is a challenge for...
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Pervasive computing has many new features, such as: the wideness related area, mobility of tasks and het-erogeneity of devices. How to support user's tasks in the pervasive computing environment is a challenge for engineer-s. The main idea in the article is that using middleware to mask the heterogeneity of devices and support user's tasksin a uniform platform. The goal of the middleware is to support mobility of task, to make the better use of resources,and to reduce user's intervene. The detail way is as follow: first, decompose application into several components,then represent user's tasks into abstract tasks and encapsulate physical service into virtual service; at last, abstracttask is completed by cooperation of several virtual services. A virtual service is mapped into different physical servicein different environment. In different environment, the same task could be completed by composing different ***, the framework of the middleware has some features, such as: hierarchy of architecture, extensibility offunctions.
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