Towards Distributed Service Discovery in Pervasive Computing Environments.

摘要

The paper proposes a novel distributed service discovery protocol for pervasive environments. The protocol is based on the concepts of peer- to- peer caching of service advertisements and group-based intelligent forwarding of service requests. It does not require a service to be registered with a registry or lookup server. Services are described using the Web Ontology Language (OWL). We exploit the semantic class /subClass hierarchy of OWL to describe service groups and use this semantic information to selectively forward service requests. OWL- based service description also enables increased flexibility in service matching. We present simulation results that show that our protocol achieves increased efficiency in discovering services (compared to traditional broadcast-based mechanisms) by efficiently utilizing bandwidth via controlled forwarding of service requests.