A Semantic and Adaptive Middleware Architecture for Pervasive Computing Systems

摘要

With the increasing demands for adaptive middlewareof dynamic systems in pervasive computing environments,the need for dynamic software architecture andprogramming infrastructure to achieve dynamic adaptationis widely recognized. In this paper, we firstly presenta semantic and adaptive middleware architecture calledScudWare that supports for dynamic and heterogeneousenvironments. ScudWare middleware is based on adaptivecommunication environments, which consists of adaptivecomponents, and semantic virtual agents. Specially, a ScudADLframework and the specification semantics, basedon higher-order typed ? calculus theory, are proposed,which describes ScudWare component structure characters,and dynamic behavior adaptation. In the ScudADL, thecomputing resources consumption is concerned. And thecomponent inner and outer adaptive behaviors are separatedfrom component functional behaviors in an explicit way. Finally,we introduce an application of ScudWare architecture,which is a computer aided assessment system in a smartCAA space, and give a case study to show its adaptation.