Differentiated service

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

System and methods for dynamic integration of a voice application with one or more Web services

Abstract: A system is provided for leveraging a Web service to provide access to information for telephone users. The system includes a first network service node for hosting the Web service, an information database accessible from the service node, a voice terminal connected to the first service node, and a service adaptor for integrating a voice application executable from the voice terminal to the Web service. In a preferred aspect, the service adaptor subscribes to data published by the Web service and creates code and functional modules based on that data and uses the created components to facilitate creation of a voice application or to update an existing voice application to provide access to and leverage of the Web service to telephone callers.

The design and implementation of service process reconfiguration with end-to-end QoS constraints in SOA

Abstract: Service processes in SOA are composed dynamically by services from different service providers. At run-time, some services may become faulty and cause a service process to violate its end-to-end quality of service (QoS) constraints. We propose an effective approach for replacing only faulty services and some of their neighboring services to maintain the original end-to-end QoS constraints. We use an iterative algorithm to search for a reconfiguration region that has replaceable services to meet the original QoS constraint for the region. Services in reconfiguration regions may be replaced using one-to-one, one-to-many, or many-to-one service mappings. By replacing only services in reconfiguration regions rather than the whole service process, reconfiguration overheads are lowered and service disruptions may be reduced. We have implemented the Adaptation Manager in the Llama ESB middleware. Performance study shows that our approach may efficiently repair service processes.

Class-based bandwidth allocation and admission control for virtual private networks with differentiated service

Abstract: A method and for establishing a virtual private network (VPN) session for a priority request. The method and apparatus includes identifying a priority request from a plurality of VPN session request classes. Reserved bandwidth is allocated to the priority request if a nominally allocated bandwidth is insufficient to satisfy the priority request. Once the allocated bandwidth is assigned, admission control is applied to the priority request.

Towards a theory of web service choreographies

Abstract: A fundamental promise of service oriented architecture (SOA) lies in the ease of integrating sharable information, processes, and other resources through interactions among the shared components that are modeled as web services. It is expected that not only the participating services are complex and have observable states, but the number of interacting services may be also large. Prior work on choreographies (conversation protocols) all focuses on specifying how the interacting web services should behave globally. Studies have shown that the relationships between global and local specifications of service interactions could be rather intricate. In this paper, we formulate a framework consisting of logical and implementation levels. We survey and discuss the technical problems and known results concerning service design, analysis and verification in this framework.