An evaluation of semantic service discovery of a U-city middleware

In ubiquitous-city, a middleware is essential since various kinds of unified services are required in many different applications and flexibility of service is required. It should dynamically discover and invoke services to exploit the flexibility and the power of the middleware and the service discovery is very important in the middleware. In this paper, we present a mechanism and elements of semantic service discovery which have been implemented and used in a u-city middleware which is the ever first research in the world. We evaluated the performance of the semantic service discovery in a u-city middleware and present the performance result in this paper. It is also the ever first research in the world.