The role of caching and context-awareness in P2P service discovery

Abstract

Mobile terminals (cellular phones, PDAs, palmtops etc.) emerge as a new class of small-scale, ad-hoc service providers that share data and functionality via mobile web services' calls. In mobile service discovery, it is often the case that implicit contextual information such as the location of the requestor, time the query was submitted, capabilities of the involved devices have a significant impact on query evaluation and the quality of the results. On the other hand, lack of scalability and the well-known single point of failure problem call for distribution of service directories into several peers. In this paper, we present an approach for context-aware service discovery where service directories reside in a P2P architecture. We explore the role and benefits of context-awareness and caching query results in the service discovery process. We conduct extensive experiments coming up with guidelines for service directory design in a P2P context.

CASD: Management of a context-aware service directory

“…Furthermore, distribution of service registries is considered in our work [14,42]. Compared to [28], our registries rely on a wired infrastructure, communicate and inter-operate directly, in order to support discovery of services hosted by mobile devices that communicate in a wireless way.…”

“…Compared to [28], our registries rely on a wired infrastructure, communicate and inter-operate directly, in order to support discovery of services hosted by mobile devices that communicate in a wireless way. In fact, we have used the JXTA framework in recent work [14], in order to study mobile service discovery in a distributed architecture of context-aware service directories.…”

Adaptive middleware architecture for information sharing on mobile phones

“…Discoverability is critical in our system. Service discovery (similar to [3]) consists of centralized community networks, where all services are registered, and a querying mechanism to locate services and resources.…”

Context-based caching and routing for P2P web service discovery

“…We also study a particular type of context-based routing, location-based routing and show how this ensures effective location-based service discovery. This paper is a revised and substantially extended version of an earlier conference paper (Doulkeridis et al, 2005), where we presented our approach regarding P2P service discovery based on caching and context-awareness. We now extend this work, by studying context-based routing of web service requests in a P2P architecture of service directories.…”