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Research And Implementation In The End User's Requirement Guided Service Creation In Convergence Networks

Posted on:2010-03-15Degree:DoctorType:Dissertation
Country:ChinaCandidate:J GuoFull Text:PDF
GTID:1118360308461786Subject:Communication and Information System
Abstract/Summary:PDF Full Text Request
With the convergence of the telecommunication network and Internet, the services that the network provides are becoming more and more indispensable to our daily life. But most of the network services are offered based on the subjective judgment of the SP (service provider). In most occasions, people can only get what the SP offers, and they cannot express their requirements. In order to improve the user's experiences, the services need to be personalized according to user's requirements. How to acquire and understand the user's requirements, and develop personalization services efficiently is a hot spot issue nowadays.Driven by the demand and principle discussed above, this dissertation mainly studies the end users requirement elicitation, analyzing and how to create personalized services based on these requirements. The main contributions are as follows:1. End user's requirement is ever changing and complex. Requirements'elicitation, understanding and description are the premise for the service personalization. This dissertation presents a novel requirements description language named BPMN-lite with related process. Considering the end users are always scattering in the geography, and they cannot always express what they need clearly, we here propose the call center mode. That is, end users communicate directly with the call center's operator. BPMN-lite is applied in the computer system in the call center, by providing a set of graphic notation and define related activity, logic and role to assist the operator understanding what the user need. The core of the BPMN-lite is its graphic modeling called BPDL, they also contains a set of documents related to them. By doing some basic training, the operator can communicate with the end user and use BPMN-lite modeling tools to elicit and analyze the user's requirements.2. The most important of the personalized service creation is to understand the requirement model, and use them to guide the entire service creation process. In the context of SOA, personalized service creation mainly reflected in how to organize the existing service better. WS-BPEL is the de facto standard in the complex service modeling field, it is also an ideal personalized service modeling method. Based on the idea mentioned above, this dissertation proposed an algorithm that translates the BPMN-lite model into WS-BPEL model. This algorithm uses iterative method to convert the graphic model into structure model effectively. As the service requirement model is descriptive while the WS-BPEL model is executable, the translation is an information increase process. So this algorithm can only provide a skeleton for the personalized services, some further manual work is also needed.3. BPMN-lite based requirement model and WS-BPEL based personalized service model are two key models in this dissertation. In order to increase the service creation efficiency, a model reuse mechanism is meaningful. In this dissertation, we proposed a semantic based model reuse mechanism:Template. No matter requirement model or service model can be extract into template in a same way. In a real world scenario, the service creation can be done by template assemble instead from scratch. Semantic information is the basis of the reuse, while the templates annotated with semantic information can make some meaningful relationship with some domain knowledge base. With the reasoning between the template concept and domain knowledge under some rules, the system can recommend the most probable service or template to the service developer, and this can notably increase the service creation efficiency.4. Without the functional services mentioned above, there still have a large number of information content services. Driven by the development of the Web 2.0 technologies, the user generated content is full of the Internet. How to organize these content services efficiently and create personalized content services is a challenging topic. In this dissertation, we proposed a unified interface definition, and have given a general form of the interface. Based on the interface, we proposed a set of content service modeling methodology, including service modeling, service relationship modeling, user modeling etc. On the basis of the models and related recommender system algorithms, we propose a Mashup based personalized content service creation method.
Keywords/Search Tags:Service Creation, SOA, Web Service, BPMN-lite, WS-BPEL, Template, Template assemble, Semantic Web, Ontology, Recommender System
PDF Full Text Request
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