A Scalable Model for Service Discovery in P2P Environment

The key to Web Service discovery is how to quickly locate target services among numerous registries, and exactly describe services so as to match between service requests and advertisements. Currently Web Service systems, which publish WSDL-described Web Services in UDDI, cannot support automatic Web Service publication, discovery and execution. UDDI has become the bottleneck of the whole system and would cause single node failure problems. Aiming at the above problems, this paper presents a semantic based web service discovery model which is designed for operation in a two-layer P2P network topology without a need for centralized service registries. Furthermore, the OWL-S ontology is used to add semantics to the Web Service descriptions and then register them on a specific registries peer in the P2P environment according to the service's domain ontology. By organizing the Web Services according to our proposed model, Web Service discovery can be realized scalability and efficiently.