Based On Context Awareness And Service Pattern Optimization Method And Tool

With the development of cloud computing,big data,Internet of things and pervasive computing,the exponential growth in the number of network resources,it is possible for people to get needed service acoording to requirement.But it is still very difficult to find service satisfied own requirement in a large amount of Web services.Professor Xu Xiaofei of Harbin Institute of Technology's ICES combines the service-oriented requirements engineering and field-oriented requirements engineering to propose a new paradigm of RE2 SEP.Based on the big service and the new paradigm of RE2 SEP proposed by Professor Xu Xiaofei,in the case of Health Care for Older,the concept of context awareness service based on the service pattern in terms of the existing user context and the expression of the context.The concept of the definition,description,meta-model and examples.In order to understand the concept more comprehensively,this paper first gives the concept of service pattern,and then puts forward the formal expression of service pattern,discusses the three main properties of the service pattern of transcendental,relevance and similarity,giving its description and calculation method.Finally,taking the Health Care for Older as an example,the list of core service patterns and typical cases are given.Then,according to the existing context-aware service model ContextUML and the concept of service pattern,the ContextUML+Service Pattern based on service pattern is proposed.Secondly,the service pattern selection model based on context-aware is proposed.In the data preprocessing,a two-layer flitering mechanism is proposed.The first mechanism is based on context perception and service composed of filter rule.The second is service pattern fliter based on the user context clustering.Finally,the user satisfaction is used as the optimization target,and the PSCMUS problem is put forward.The problem is given in this paper.The service pattern/ atomic service set is optimized by using the artificial bee colony algorithm based on the service pattern,doing experiment and analysis for the problem.Finally,this paper designs and implements a context-aware service modeling tool based on service pattern.The tool includes service pattern management,context service management,context awarenesss model base on the service patterm management,simulation run and application validation of these six functional modules,using tool validation to put forward the correctness of the theory.