支持动态更新和组合的普适服务平台设计

In pervasive computing, how to dynamically combine some simple services into a complex service that can correctly response to users has aroused general interests. However, due to the mobility and poor-resource of devices in pervasive environments, services provided by these devices may become unavailable on demand. At this time, an appropriate service should be found to replace its original one. To achieve the aim, we develop a dynamic upgrading and composition platform based on semantic web technology and OSGi specification. In the platform, services can be composed automatically and updated dynamically under consideration of users' requirements. We also develop related GUI user interface to make the management of services by users convenient.