Differentiated service

About: Differentiated service is a research topic. Over the lifetime, 5539 publications have been published within this topic receiving 105225 citations.

Adaptive interaction for enabling pervasive services

Abstract: We describe an architecture that allows mobile users to access a variety of services provided by pervasive computing environments Novel to our approach is that the system selects and executes services taking into account arbitrary contextual information (eg location or preferences) Our architecture is based on an adaptive service interaction scheme; individual service requests are attributed by context constraints, which specify the adaption policy Context constraints may relate to spatial or temporal concerns We propose a document-based approach; so called Context-Aware Packets (CAPs) contain context constraints and data for describing an entire service request Intermediary network nodes route and apply the data to services, which match the embedded constraints Services are identified by characterizing attributes, rather then explicit network addresses The execution of selected services may be deferred, and triggered by a specific event Service requests carry the context of their use, therefore our system works well in environments with intermitted connectivity, less interaction with the issuing requester is required

Network-as-a-service product director

Abstract: A device may receive order information that may identify a network service to be provided, via a service provider network, to a service location associated with a customer. The device may determine context information associated with providing the network service. The context information may be determined based on the order information and may include information associated with a virtual network function (VNF) that is to provide the network service to the service location. The device may determine provisioning details associated with the network service. The device may generate a service request that includes the context information and the provisioning details. The device may identify a cloud resource that is to host the VNF. The device may provide the service request to the cloud resource to cause the VNF to be created and inserted into the service provider network.

QoS ontology for service selection and reuse

Abstract: Web service technologies become popular in software development in all sectors. Variety services related standards are defined but they still have limitations to represent the services such as the service registry does not support the Quality of Service (QoS) properties, web service description language does not allow specifying the QoS properties and there is no common ontology's structure to store services. Our research aims to enhance the representation of services to assist the service selection and composition process in order to reduce the development costs. The existing resources are analyzed to define a web service ontology (WSOnto). Furthermore, a service selection algorithm is proposed to validate the proposed WSOnto. It considers the multiple criteria of inputs such as: context, functional and non-functional properties of services. The WSOnto and a service selection algorithm are studied to assist the re-engineering of business processes from users' designed business processes.

A Novel Framework for Service Set Recommendation in Mashup Creation

Abstract: With an overwhelming number of web services online, recommending services for automatic mashup creation greatly facilitates the composition process of developers. Various approaches have been proposed for the task. However, these approaches concentrate on improving the recommending accuracy of an individual service, which give rise to two problems: (1) Top-ranked services may be highly redundant with the same functionality, and (2) The cooperation relations among services are ignored. Therefore, we argue that services should be recommended not individually, but collectively. In this paper, we focus on the problem of recommending service sets instead of services. A service set contains a list of functionally distinct services that collectively match different aspects of functional requirements and are more inclined to compose together following mashup composition patterns. To this end, we propose a novel recommendation framework consisting of two stages: Service Set Generation Stage and Service Set Ranking Stage. We also perform an experimental evaluation on ProgrammableWeb dataset to demonstrate the effectiveness of our framework.

QoS-Driven web service composition with inter service conflicts

Abstract: Web service composition provides a way to build value-added services and web applications by integrating and composing existing web services. In a two-stage approach for web service composition, an abstract specification is synthesized in the first phase and an executable composition process is generated in the second phase by selecting and binding a concrete web service for each abstract task. However, the selection of a web service for one task is not a stand-alone operation, as there may be compatibility conflicts between this service and services chosen for other tasks. This paper gives a method for dynamic web service selection in the presence of inter service dependencies and conflicts. Firstly, a method based on Integer Programming is discussed to implement the process of dynamic service selection. Then, inter service conflicts are explored and expressed formally, which are accommodated into the IP-based method. By combing domain specific service conflicts into a two-stage approach, the method in this paper provides a united approach for dynamic service selection that can integrate both QoS constraints and other domain specific constraints. Experiments show that this method is effective and efficient.