Internet of Things is an emerging technology, which is combined with embeded, computing, network and other information technology. Services in Internet of Things are different from traditional services, because their environment is dynamic and function is limited. On the basis of the study for web service's combination, paper which by the definition of context in Internet of Things, proposes a context-based service composition method, and has a testing of application. The result shows that service composition method has some practical significance, which both adapt to resources dynamic changes in Internet of Things, and can effectively improve user satisfaction.
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