Ubiquitous Service Model based on Contextual Semantics

T. Sun, S. Revankar, and J. Walker (USA)


Ubiquitous computing, contextual semantics, service oriented architecture


The ubiquitous service model (USM) described in this paper is a consumer-centric model. Unlike the traditional provider-centric service model in which service providers focus on defining service interfaces, the core concepts of USM are about understanding the context of services providers and consumers, and using this “contextual” knowledge to automatically aggregate relevant services to ultimately serve the service consumer. USM also leads to an intelligent service provisioning process that adapts to the service consumer’s context with efficient resource utilization. This paper introduces the core semantic model of USM, which contains the contextual information (or context, in-short), needs (what is needed), intent (what is intended), and instructions (how to deliver). Based upon this multi-layered semantics model, the context-adaptive service aggregation model is proposed and articulated through some examples. Furthermore, the conceptual architecture of USM and its relationship with other existing and emerging technologies are illustrated and discussed.

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