Differentiated service

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

Service creation technologies for the intelligent network

Abstract: An intelligent network lets a switch query a network node for help in completing a call. Such a node, for example, can translate an 800 number into a true network address. The network service provider often creates the logic in an intelligent network, but frequently that logic is written by sophisticated subscribers (business customers). Since subscribers can create their own service logic, the service creation system must ensure that such customized logic will not cause the network node to fail or in any way affect the service of other subscribers. Service creation technologies are the tools and technical infrastructure designed specifically to help create and update services. AT&T has created software tools to support application-oriented languages. Its service creation technologies are evolving to meet service provider and service subscriber demands for more control over the services they provide and use.

Quality of Experience: User's Perception about Web Services

Abstract: Web service composition enables seamless and dynamic integration of Web services. The behavior of participant Web services determines the overall performance of a composition. Therefore, it is important to choose high quality services for service composition. Existing Web service selection and discovery approaches rely on non-functional aspects (also known as quality of service or QoS), e.g., response time and availability. Though these parameters are crucial for selecting Web services, they may not reflect the user's perspective of quality. In this paper, we explore the feasibility of incorporating perceived quality from user's perspective for service selection and composition. We name such quality attributes as quality of experience (QoE). First, we propose a solution that automatically mines and identifies QoE attributes from the Web. Second, we study the application of such dynamically extracted QoE attributes for service selection. For the evaluation purpose, we collected more than 34,000 reviews from 58 different services in six domains. Our findings show that it is possible to automatically identify QoE attributes with an average precision and recall of 92 and 80 percent respectively. Our study shows that there is a strong positive correlation between QoS and QoE. Hence QoE can be used during service selection especially when QoS data are not available. Furthermore, we found 70 percent of service discovery queries indeed contain QoE attributes showing the importance of QoE attributes during the service discovery phase.

Quality of service models for ad hoc wireless networks

Abstract: This chapter discusses Quality of Service (QoS) models for ad hoc wireless networks (also called Mobile Ad hoc Networks [MANETs]). After examining the features of MANETs and QoS models of the Internet, a Flexible QoS Model for MANETs (FQMM) is proposed. Salient features of FQMM include the dynamic roles of nodes and a hybrid provisioning policy that combines the fine-grained QoS of Integrated Service and service differentiation of Differentiated Service. A framework architecture to realize FQMM is discussed, and the functionalities of and the interreactions among its components are elaborated. By simulation, FQMM is evaluated against its performance in service prioritization and service differentiation in MANETs by implementing relevant components in the FQMM framework architecture.

Method of improving access to services provided by a plurality of remote service providers

Abstract: A server system provides a client system with access to a number of services. For each service, if a given service provider is overloaded or if the client is unable to contact that provider, the client can contact another service provider capable of providing the requested service. The server system provides information to the client system identifying a list of services that the server system provides. For each service in the list of services, the information may include a service name identifying the service, and a unique port identifying each service provider for that service, so that one service name can be used in accessing multiple service providers of a desired service. A request from the client may include a service name identifying the desired service, and a port selected from ports provided by the server system that corresponds to a service provider for the desired service.